{"title":"HM Digital","description":"","products":[{"product_id":"hm-digital-com-100-hmdcom100-waterproof-ec-tds-and-amp-temperature-combo-meter-white-purple","title":"HM Digital COM-100 HMDCOM100 Waterproof EC\/TDS And Amp Temperature Combo Meter, White\/Purple","description":"\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMeasures electrical conductivity (EC), total dissolved solids (TDS) and temperature\u003c\/li\u003e\n\u003cli\u003eThree different calibration options (KCl, 442TM, NaCl), each with its own non-linear conversion factor\u003c\/li\u003e\n\u003cli\u003eAutomatic temperature compensation (ATC) using three temperature coefficients\u003c\/li\u003e\n\u003cli\u003eWaterproof\u003c\/li\u003e\n\u003cli\u003eMeasurement range: 0-9990 µS; 0-8560 ppm.\u003c\/li\u003e\n\u003cli\u003eAuto-off function, data-hold function and low-battery indicator.\u003c\/li\u003e\n\u003cli\u003eDisplay: large and easy-to-read LCD screen includes simultaneous temperature reading.\u003c\/li\u003e\n\u003cli\u003eFactory calibrated: the COM-100 meter is calibrated with a 1413 µS solution. The meter can be re-calibrated with digital calibration using the push buttons, rather than a screwdriver\u003c\/li\u003e\n\u003cli\u003eIncludes a cap, batteries, and lanyard\u003c\/li\u003e\n\u003cli\u003eIdeal for all water purification applications, waste water regulation, aquaculture, hydroponics, and more\u003c\/li\u003e\n\u003cli\u003ePower Source: 2 x 1.5V AAA Alkaline batteries (included)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":43322003488957,"sku":"COM-100","price":49.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/bchpiqgnfkyoyqiy5t8a.jpg?v=1772830444"},{"product_id":"hm-digital-com-80-ec-tds-combo-meter","title":"HM Digital COM-80 EC\/TDS Combo Meter","description":"\u003cb\u003eThe HM Digital COM-80 \u003c\/b\u003eis an affordable handheld electrical conductivity (EC) and total dissoved solids (TDS) meter. The COM-80 is ideal for use in applications such as hydroponics and gardening, pools and spas, aquariums and reef tanks, water ionizers, drinking water, nutrient testing and more.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eMeasures electrical conductivity (EC) and total dissolved solids (TDS)\u003c\/li\u003e\n\u003cli\u003eFour scales: EC: µS, mS; TDS: ppm, ppt\u003c\/li\u003e\n\u003cli\u003eAutomatic Temperature Compensation (ATC)\u003c\/li\u003e\n\u003cli\u003eWater resistant\u003c\/li\u003e\n\u003cli\u003eMeasurement Range: 0-9990 µS; 0-5000 ppm; 0-9.9 mS; 0-5 ppt\u003c\/li\u003e\n\u003cli\u003eAuto-off function, data-hold function and low-battery indicator.\u003c\/li\u003e\n\u003cli\u003eDisplay: large and easy-to-read LCD screen includes simultaneous temperature reading.\u003c\/li\u003e\n\u003cli\u003eDigital calibration (push button) to any point within the meters range\u003c\/li\u003e\n\u003cli\u003eFactory calibrated with a 1413 µS solution. The meter can be re-calibrated with digital calibration using the push buttons\u003c\/li\u003e\n\u003cli\u003eIncludes a cap and batteries\u003c\/li\u003e\n\u003cli\u003eIdeal for all water purification applications, waste water regulation, aquaculture, hydroponics, nutrient testing and more\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":43322003521725,"sku":"COM-80","price":25.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/fqa8ibged8jy8p3mc4s5.jpg?v=1772829479"},{"product_id":"hm-digital-ph-80-handheld-ph-temp-meter","title":"HM Digital PH-80 Handheld pH \/ Temp Meter","description":"The \u003cb\u003eHM Digital PH-80 Handheld pH \/ Temp Meter\u003c\/b\u003e is an economically priced, reliable pH meter. The PH-80 HydroTester is ideal for testing applications such as hydroponics and gardening, pools and spas, aquariums and reef tanks, drinking water, water ionizers or with an Aptera Alkamag Alkaline Water Filter.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eMeasures pH and temperature\u003c\/li\u003e\n\u003cli\u003eSimultaneously displays both pH and temperature\u003c\/li\u003e\n\u003cli\u003eLarge LCD screen\u003c\/li\u003e\n\u003cli\u003eWater resistant\u003c\/li\u003e\n\u003cli\u003eSleek, lightweight design\u003c\/li\u003e\n\u003cli\u003eAutomatic temperature compensation\u003c\/li\u003e\n\u003cli\u003eAuto-off function, data-hold function and low-battery indicator\u003c\/li\u003e\n\u003cli\u003eLong battery life: approximately 2 years\u003c\/li\u003e\n\u003cli\u003eIncludes a cap, batteries, storage solution and pH7.0 buffer\u003c\/li\u003e\n\u003cli\u003eFactory calibrated: The PH-80 meter is calibrated at the factory to pH 7.0 and can be quickly and easily recalibrated to pH 4.0, 7.0 or 10.0 using the meter's simple digital one-touch process.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eNote: Your HM Digital PH-80 meter is shipped with the sponge in the cap dry. Prior to use, pour a small amount of storage solution from the mylar packet into the sponge so that the sponge is moist (not dripping wet). Put the cap back on and allow to soak for 15 minutes (standing upright) prior to use. Additional \u003cu\u003e\u003cb\u003eelectrode storage solution\u003c\/b\u003e\u003c\/u\u003e is available for purchase.\u003c\/b\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":43322004406461,"sku":"PH-80","price":28.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/yqt9sg0vnckphv7tmhfr.jpg?v=1772831128"},{"product_id":"hm-digital-tds-3-handheld-tds-meter-with-thermometer","title":"HM Digital TDS-3 Handheld TDS Meter With Thermometer","description":"The HM Digital TDS-3 handheld water quality tester enables you to determine just how good or bad your water really is! These testers accurately measure the TDS level in your water. Ideal for testing reverse osmosis membrane performance and determining the need for replacement. Ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver. Perfect for both consumer or commercial use. Carry one in your pocket or toolbox at all times!   \u003cbr\u003e  \u003cb\u003eFeature:\u003c\/b\u003e  \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eHighly efficient and accurate\u003c\/b\u003e due to its advanced microprocessor technology.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHold function\u003c\/b\u003e -- Saves measurements for convenient reading and recording, with the sound of a buzzer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAuto-off function\u003c\/b\u003e -- Turns off meter after 10 minutes of non-use to conserve batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAutomatic function\u003c\/b\u003e -- After operating three minutes in the same condition,the measurement simply stops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh TDS Reading\u003c\/b\u003e -- In case of measuring over 999ppm, the figure of X 10 twinkles automatically.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDigital Thermometer\u003c\/b\u003e -- Built-in thermometer with temp button.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDisplay\u003c\/b\u003e -- Large and easy-to-read LCD screen.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFactory Calibrated\u003c\/b\u003e -- Recalibration is not necessary, but can be done easily with a watch screwdriver.\u003c\/li\u003e\n\u003c\/ul\u003e  The NSF minimum Standard for Percent Rejection is 75%. We recommend replacing the RO membrane once it tests at 80% rejection or lower.  \u003cbr\u003e\u003cbr\u003e  \u003cb\u003eEasy to Follow Instructions!\u003c\/b\u003e  \u003cbr\u003e  Using a clean cup or glass, take a sample of your raw feed water. Remove the protective cap from the Tester. Push the \"ON\" button to activate LCD display. Submerse the tester's probes into the water sample and observe for approx. 10 seconds. Record the results. Repeat the same procedure with a sample of your reverse osmosis (RO) water. If the system is new or the membrane has been replaced, do not test the first tank of RO water. The first tank of product water will contain sanitizer and possibly carbon fines from your new filters. This will cause false reading. Use the following formula to calculate the percentage of solids (TDS) that your membrane is removing:","brand":"HM Digital","offers":[{"title":"Single","offer_id":43322005618877,"sku":"TDS-3","price":12.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/elirif6x06xnknxdumtd.jpg?v=1772831123"},{"product_id":"com-360-waterproof-professional-series-ph-ec-tds-temp-meter","title":"COM-360: Waterproof Professional Series pH\/EC\/TDS\/Temp Meter","description":"\u003cp\u003eThe COM-360 is a professional grade level pH\/EC\/TDS\/Temp meter ideal \nfor all water quality testing, hydroponics, water purification \napplications, wastewater regulation, aquaculture, colloidal silver, labs\n \u0026amp; scientific testing, pools \u0026amp; spas, ecology testing, boilers \n\u0026amp; cooling towers, water treatment and more.\u003c\/p\u003e\n\u003cp\u003eFEATURES:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMeasures Potential Hydrogen (pH), Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity and Temperature\u003c\/li\u003e\n\u003cli\u003eFive scales: pH, µS, mS, ppm 0.5 (NaCl) Scale \u0026amp; 0.7 (442™) Scale\u003c\/li\u003e\n\u003cli\u003eAutomatic Temperature Compensation (ATC) using three temperature coefficients\u003c\/li\u003e\n\u003cli\u003eWater resistant housing\u003c\/li\u003e\n\u003cli\u003eDigital Calibration (push button) to any point within the meter’s range\u003c\/li\u003e\n\u003cli\u003eAuto-off function, data-hold function, and low-battery indicator\u003c\/li\u003e\n\u003cli\u003eDisplay: large and easy-to-read LCD screen includes simultaneous temperature reading\u003c\/li\u003e\n\u003cli\u003eReplaceable Sensor (model SP-CP)\u003c\/li\u003e\n\u003cli\u003eFactory Calibrated (pH\/EC\/TDS)\u003c\/li\u003e\n\u003cli\u003eIncludes translucent cap, 2 (AAA) alkaline batteries, pH 4 \u0026amp; 7 calibration solutions, pH storage solution and lanyard\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46384936583357,"sku":"COM-360","price":116.5,"currency_code":"USD","in_stock":true},{"title":"2-Pack","offer_id":46384936616125,"sku":"COM-360:2PK","price":219.02,"currency_code":"USD","in_stock":true},{"title":"5-Pack","offer_id":46384936648893,"sku":"COM-360:5PK","price":512.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/al1mwgvsqvru8u5rbzf1.jpg?v=1772829288"},{"product_id":"hm-digital-hydroponics-pro-kit","title":"HM Digital Hydroponics Pro Kit","description":" The \u003cb\u003eHM Digital Hydroponics Pro Kit\u003c\/b\u003e is the hydro growers all in one solution. This kit combines the accurate COM-100 TDS (PPM)\/EC\/Temp meter and the reliable PH-200 pH\/Temp meters together into one package.  \u003cbr\u003e  It also includes a zip closure protective case and a generous amount of calibration and storage solutions. This is the best value on the market for anyone looking to test as the Pro’s do.  \u003cbr\u003e  \u003cb\u003e\u003cbr\u003e\u003c\/b\u003e  \u003cb\u003eHM Digital Hydroponics Pro Kit Contains:\u003c\/b\u003e \u003cul\u003e\n\u003cli\u003e(1) PH-200 Meter\u003c\/li\u003e\n\u003cli\u003e(1) COM-100 Meter\u003c\/li\u003e\n\u003cli\u003e(3) PH-4 Buffer\u003c\/li\u003e\n\u003cli\u003e(3) PH-7 Buffer\u003c\/li\u003e\n\u003cli\u003e(3) CP-1000 Solution\u003c\/li\u003e\n\u003cli\u003e(3) PH-STOR Solution\u003c\/li\u003e\n\u003cli\u003e(2) Lanyard\u003c\/li\u003e\n\u003cli\u003e(3) Solution Cup\u003c\/li\u003e\n\u003c\/ul\u003e  ","brand":"HM Digital","offers":[{"title":"Single","offer_id":46385026367677,"sku":"HPK-1","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/qipggwpfydbsl7gcgsax.jpg?v=1772830782"},{"product_id":"hm-digital-dm-3-commercial-in-line-dual-tds-meter","title":"HM Digital DM-3 Commercial In-Line Dual TDS Meter","description":"\u003cp\u003eElevate the performance of your water filtration system with the DM-3, a commercial-grade EC\/TDS monitor engineered for precision and reliability. Designed to measure the Electrical Conductivity (EC) and Total Dissolved Solids (TDS) of both feed (input) and product (output) water, the DM-3 ensures you have real-time data to maintain optimal water quality.\u003c\/p\u003e\u003cp\u003eThe DM-3 boasts a large, backlit screen for clear visibility, even in dark environments, and is equipped with robust shielded cables and diagnostic messaging, making it the ideal choice for Reverse Osmosis (RO) and Deionized water (DI) filtration systems. It excels in a variety of applications, including drinking water, water treatment, aquariums, hydroponics, and more.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e- Advanced Microprocessor Technology:** Highly efficient and accurate measurements.\u003cbr\u003e- Dual Probe Readings:** Displays TDS levels for both feed and product water.\u003cbr\u003e- Auto-Off Function:** Automatically shuts off after 3 minutes to conserve battery power.\u003cbr\u003e- Factory Calibrated:** Pre-calibrated with a 342 ppm NaCl solution, featuring digital calibration.\u003cbr\u003e- Diagnostic Error Messaging:** Helps identify and troubleshoot issues quickly.\u003cbr\u003e- Shielded Sensor Cables:** Provides durability and interference protection.\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eUpgrades from DM-1 \u0026amp; DM-2\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e- Commercial\/Industrial Design:** Enhanced for tougher applications.\u003cbr\u003e- Water-Resistant Casing:** Provides additional protection.\u003cbr\u003e- Individual Line Calibration:** Digital calibration for each line.\u003cbr\u003e- Improved Display:** Extra-large, easy-to-read LCD.\u003cbr\u003e- Longer Cables:** Waterproof, shielded for greater durability.\u003cbr\u003e- Slim Design:** New, sleek profile with variable mounting options.\u003c\/p\u003e\u003cp\u003eThe DM-3 is your go-to solution for professional-grade water quality monitoring, offering superior accuracy, reliability, and ease of use for a wide range of applications. Whether for industrial water treatment or hobbyist setups, the DM-3 delivers unmatched performance.\u003c\/p\u003e","brand":"HM Digital","offers":[{"title":"1\/2\" Feed x 1\/2\" Product","offer_id":46385029841085,"sku":"DM-3-5050","price":72.14,"currency_code":"USD","in_stock":true},{"title":"1\/2\" Feed x 3\/8\" Product","offer_id":46385029808317,"sku":"DM-3-5038","price":75.43,"currency_code":"USD","in_stock":true},{"title":"1\/4\" Feed  x 1\/2\" Product","offer_id":46385029677245,"sku":"DM-3-2550","price":74.21,"currency_code":"USD","in_stock":true},{"title":"1\/4\" Feed x 1\/4\" Product","offer_id":46385029611709,"sku":"DM-3-2525","price":71.09,"currency_code":"USD","in_stock":true},{"title":"1\/4\" Feed x 3\/8\" Product","offer_id":46385029644477,"sku":"DM-3-2538","price":72.31,"currency_code":"USD","in_stock":true},{"title":"3\/8\" Feed x 1\/2\" Product","offer_id":46385029775549,"sku":"DM-3-3850","price":75.43,"currency_code":"USD","in_stock":true},{"title":"3\/8\" Feed x 1\/4\" Product","offer_id":46385029710013,"sku":"DM-3-3825","price":72.31,"currency_code":"USD","in_stock":true},{"title":"3\/8\" Feed x 3\/8\" Product","offer_id":46385029742781,"sku":"DM-3-3838","price":70.24,"currency_code":"USD","in_stock":true},{"title":"No Fittings","offer_id":46385029578941,"sku":"DM-3-NF","price":66.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/mtty6pcwu5y2kg0ahmbb.jpg?v=1772831097"},{"product_id":"handheld-tds-meter-zt-2","title":"Handheld TDS Meter ZT-2","description":"The HM Digital ZT-2 Handheld TDS meter is a handheld water quality tester that enables you to determine just how good or bad your water really is! These testers accurately measure the TDS level in your water. Perfect for both consumer or commercial use. Carry one in your pocket or toolbox at all times!\u003cbr\u003e  \u003cbr\u003e \u003cb\u003eFeatures:\u003c\/b\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIdeal For All Water Purification Applications.\u003c\/b\u003e This meter is ideal for testing reverse osmosis membrane performance and determining the need for replacement. Ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHighly Efficient and Accurate. \u003c\/b\u003eThe HM Digital ZT-2 Handheld TDS Meter has advanced microprocessor technology that makes it highly efficient and accurate. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHold function.\u003c\/b\u003e This meter has measurements for convenient reading and recording, with the sound of a buzzer. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAutomatic function.\u003c\/b\u003e After operating three minutes in the same condition, the measurement simply stops! This meter will also turn off meter after 10 minutes of non-use to conserve battery power. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh TDS reading. \u003c\/b\u003eIn case of measuring over 999ppm, the figure of X 10 twinkles automatically. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEasy-To-Read Display.\u003c\/b\u003e This meter has a large and easy-to-read LCD screen for convenient us for anyone.   \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFactory calibrated.\u003c\/b\u003e Recalibration is not necessary, but can be done easily with a watch screwdriver. \u003c\/li\u003e\n\u003c\/ul\u003e                 Packaged in retail blister pack.   \u003cb\u003eRequires two 1.5V Button Cell Batteries (not included).    \u003c\/b\u003e \u003cbr\u003e  \u003cb\u003e\u003cbr\u003e\u003c\/b\u003e  \u003cb\u003eNote: This TDS meter is sold with no warranty.  \u003c\/b\u003e   \u003cbr\u003e\u003cbr\u003e    The NSF minimum standard for percent rejection is 75%. We recommend replacing the RO membrane once it tests at 80% rejection or lower.      \u003cbr\u003e  \u003cb\u003e\u003cbr\u003e\u003c\/b\u003e  \u003cb\u003eEasy to Follow Instructions!\u003c\/b\u003e \u003cbr\u003e\u003cbr\u003e     Using a clean cup or glass, take a sample of your raw feed water. Remove the protective cap from the Tester. Push the \"ON\" button to activate LCD display. Submerse the tester's probes into the water sample and observe for approx. 10 seconds. Record the results. Repeat the same procedure with a sample of your reverse osmosis (RO) water. If the system is new or the membrane has been replaced, do not test the first tank of RO water. The first tank of product water will contain sanitizer and possibly carbon fines from your new filters. This will cause false reading. Use the following formula to calculate the percentage of solids (TDS) that your membrane is removing:","brand":"HM Digital","offers":[{"title":"Single","offer_id":46555485012157,"sku":"TDS-ZT2","price":12.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/pmtey0w3h8khuggz1xku.jpg?v=1774985609"},{"product_id":"hm-digital-cic-152-dual-control-dosing-injection-tds-ec-controller","title":"HM Digital CIC-152 Dual Control Dosing\/Injection TDS\/EC Controller","description":"The \u003cb\u003eHM Digital CIC-152 TDS\/EC Controller monitors \u003c\/b\u003eand controls dosing or injection systems with two adjustable set points to keep TDS level within a range. The CIC-152 allows you to set minimum and maximum control points that will activate relay controls to send an analog signal to an external device via switching dry contacts. The external devices must have their own power source. \u003cbr\u003e\u003cbr\u003e \u003cb\u003eFeatures:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eMonitors and controls dosing or injection systems\u003c\/li\u003e\n\u003cli\u003eLarge, bright tri-colored LED display\u003c\/li\u003e\n\u003cli\u003eTwo adjustable set points keep TDS levels within a range\u003c\/li\u003e\n\u003cli\u003eAn alarm will sound if the TDS reaches the minimum or maximum set point, and will start or stop a device (pump, valve, etc.) via switching a dry contact position.\u003c\/li\u003e\n\u003cli\u003eOnce the TDS level returns to the acceptable range, the alarm will stop and the dry contacts will switch to the normal position.\u003c\/li\u003e\n\u003cli\u003eDigital calibration.\u003c\/li\u003e\n\u003cli\u003eOn-screen temperature display.\u003c\/li\u003e\n\u003cli\u003eInstalls easily in minutes.\u003c\/li\u003e\n\u003cli\u003eIncludes one sensor probe.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610132926653,"sku":"HMCIC-152","price":301.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/lzsjc0o4tzlkvi5a0pyu.jpg?v=1775564745"},{"product_id":"hm-digital-hydromaster-continuous-ph-ec-tds-temperature-monitor","title":"HM Digital HydroMaster Continuous pH\/EC\/TDS\/Temperature Monitor","description":"The \u003cb\u003eHM Digital HydroMaster \u003c\/b\u003econtinuously monitors pH, EC, and TDS temperature levels. The HM-500 is very accurate and can be calibrated with various buffer solutions, but also features automatic buffer recognition. The HydroMaster also features a rechargeable Lithium Ion battery which is strong enough to power the very bright LCD touch screen which has automatic light detection for low light situations.\u003cbr\u003e \u003cbr\u003e \u003cb\u003eHighly Accurate pH\/EC\/TDS Monitor.\u003c\/b\u003e The HM-500 continuously monitors pH, EC, and TDS temperature levels.\u003cbr\u003e \u003cb\u003e\u003cbr\u003e\u003c\/b\u003e  \u003cb\u003eAdjustable High \u0026amp; Low Alarm.\u003c\/b\u003e The HM-500 features an adjustable high-low set point and on\/off function.  \u003cb\u003e \u003cb\u003e\u003cbr\u003e\u003c\/b\u003e \u003c\/b\u003e \u003cb\u003e\u003cbr\u003e\u003c\/b\u003e  \u003cb\u003eLCD Touch-Type Screen with Auto Back Lighting. \u003c\/b\u003eThe HM-500 features a LCD touch screen which has automatic light detection and can be used in very dark places.   \u003cb\u003e \u003c\/b\u003e \u003cb\u003e\u003cbr\u003e\u003c\/b\u003e  \u003cb\u003e\u003cbr\u003e\u003c\/b\u003e  \u003cb\u003eABS Probes with Platinum Electrodes.\u003c\/b\u003e The HM-500 ABS probes features 1\/2\" sensor probes and platinum electrodes.    \u003cb\u003e \u003c\/b\u003e \u003cb\u003e\u003cbr\u003e\u003c\/b\u003e  \u003cb\u003eRechargeable Lithium Battery.\u003c\/b\u003e The HM-500 includes a rechargeable lithium ion battery.","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209145021,"sku":"HM-500","price":226.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/k8idvfr1io6j4ffrzpaz.jpg?v=1775566928"},{"product_id":"hm-digital-sp-2-dual-tds-sensor-probe-for-dm-1-dual-inline-tds-monitor","title":"HM Digital SP-2 Dual TDS Sensor Probe for DM-1 Dual Inline TDS Monitor","description":"\u003cb\u003eFeatures\u003c\/b\u003e:\u003cul\u003e\n\u003cli\u003eEach sensor has a blue or red wrap and is labeled \"in\" or \"out\"\u003c\/li\u003e\n\u003cli\u003eStainless steel sensors\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eHM Digital SP-2 Dual TDS Sensor Probes Specifications\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSensors:\u003c\/b\u003e Stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProbe:\u003c\/b\u003e 1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCable:\u003c\/b\u003e 24.5\" shielded cable standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConnector:\u003c\/b\u003e 8-pin\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209243325,"sku":"HM-SP-2","price":10.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/qt1kqufkebv1ajdowktx.jpg?v=1775566928"},{"product_id":"hm-digital-ldm-100r-commercial-grade-dual-line-ec-tds-monitor","title":"HM Digital LDM-100R Commercial Grade Dual Line EC\/TDS Monitor","description":"The \u003cb\u003eHM Digital LDM-100R Commercial Grade Dual Line EC\/TDS Monitor \u003c\/b\u003ereads in an extended range to monitor and control electrical conductivity (EC) and total dissolved solids (TDS) levels for high output systems (110-220V).\u003cbr\u003e\u003cbr\u003e \u003cb\u003eFeatures:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDual Line.\u003c\/b\u003e The LDM-100R allows for simultaneous monitoring of two separate water lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExtended Range Measurements\u003c\/b\u003e. The extended range ensures your water supply is pristine due to the monitor's ability to detect a wider range of EC and TDS.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOptional Alarm\u003c\/b\u003e. An optional steady beep can be set to alarm when EC\/TDS levels exceed user-set values.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e\"Mini\" Monitor. \u003c\/b\u003eThe compact size of the LDM-100R makes installation simple and easy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExtended Battery Life.\u003c\/b\u003e The HM Digital LDM-100R features an extended battery life for continous monitoring. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMonitoring for Commercial RO Systems.\u003c\/b\u003e The HM Digital LDM-100R commercial grade monitor gives the user the \"In-put\" water (Line 1) and \"Out-put\" water (Line 2) in addition to the % of rejection number of how much TDS is being rejected. \u003c\/li\u003e\n\u003c\/ul\u003e \u003cb\u003eSpecifications:\u003c\/b\u003e \u003cul\u003e\n\u003cli\u003eWarranty: One year\u003c\/li\u003e\n\u003cli\u003eAutomatically calculates the % of rejection\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209308861,"sku":"LDM-100R","price":85.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/ozy7njrkminsxfqyqqkm.jpg?v=1775566928"},{"product_id":"hm-digital-dm-2-commercial-in-line-dual-tds-meter","title":"HM Digital DM-2 Commercial In-Line Dual TDS Meter","description":"  The HM Digital DM-2 Commercial In-Line Dual TDS Meter is a water quality tester that accurately measures the total dissolved solids (TDS) in your tap (feed) water and purified (product) water. You can use these readings from the meter to determine when the reverse osmosis membrane needs replacing. The DM-2 can be installed in residential, commercial and industrial applications such as car washes, window washing, manufacturing and food processing systems.    \u003cbr\u003e  \u003cb\u003eSpecifications:\u003c\/b\u003e  \u003cul\u003e\n\u003cli\u003eAvailable with 1\/4\", 3\/8\" or 1\/2\" quick connect fittings\u003c\/li\u003e\n\u003cli\u003eInstalls quickly and easily\u003c\/li\u003e\n\u003cli\u003eDiagnostic error messaging\u003c\/li\u003e\n\u003cli\u003eShielded sensor cables\u003c\/li\u003e\n\u003cli\u003eHighly efficient and accurate due to its advanced microprocessor technology\u003c\/li\u003e\n\u003cli\u003eAuto-off function automatically shuts off meter after 3 minutes of non-use to conserve battery power\u003c\/li\u003e\n\u003cli\u003eDisplays TDS levels of the feed water and product water with in and out electrode probes\u003c\/li\u003e\n\u003cli\u003eMeasures from 0-999 ppm with a resolution of 1 ppm. \u003c\/li\u003e\n\u003cli\u003eMeasures from 1000 to 9990 ppm with a resolution of 10 ppm indicated by a blinking \"x10\" image.\u003c\/li\u003e\n\u003cli\u003eFactory calibrated with a 342 ppm NaCl solution. Meters can be digitally recalibrated.\u003c\/li\u003e\n\u003cli\u003eComes equipped with Quick-Connect T-fittings as shown\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"1\/2\" Feed x 1\/2\" Product","offer_id":46610209341629,"sku":"DM-2-5050","price":39.96,"currency_code":"USD","in_stock":true},{"title":"1\/2\" Feed x 3\/8\" Product","offer_id":46610209374397,"sku":"DM-2-5038","price":41.36,"currency_code":"USD","in_stock":true},{"title":"1\/4\" Feed x 1\/2\" Product","offer_id":46610209407165,"sku":"DM-2-2550","price":38.47,"currency_code":"USD","in_stock":true},{"title":"1\/4\" Feed x 1\/4\" Product","offer_id":46610209439933,"sku":"DM-2-2525","price":36.97,"currency_code":"USD","in_stock":true},{"title":"1\/4\" Feed x 3\/8\" Product","offer_id":46610209472701,"sku":"DM-2-2538","price":38.0,"currency_code":"USD","in_stock":true},{"title":"3\/8\" Feed x 1\/2\" Product","offer_id":46610209505469,"sku":"DM-2-3850","price":39.5,"currency_code":"USD","in_stock":true},{"title":"3\/8\" Feed x 1\/4\" Product","offer_id":46610209538237,"sku":"DM-2-3825","price":38.0,"currency_code":"USD","in_stock":true},{"title":"3\/8\" Feed x 3\/8\" Product","offer_id":46610209571005,"sku":"DM-2-3838","price":39.03,"currency_code":"USD","in_stock":true},{"title":"no fitting (1\/4\" probes only)","offer_id":46610209603773,"sku":"DM-2-NF","price":33.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/b68vmhgg7kphkrj2vqec.jpg?v=1775566928"},{"product_id":"hm-digital-ph-orp-electrode-storage-solution","title":"HM Digital pH\/ORP Electrode Storage Solution","description":"The\u003cb\u003e HM Digital OP-STOR pH\/ORP Electrode Storage Solution \u003c\/b\u003eshould be used to always keep your pH sensor wetted with a pH storage solution. If the sponge in your meter's cap is dry, re-wet the sponge so it is moist. If salt residue (white deposits) forms on the sensor or cap, wipe away with a tissue. The residue will not harm the meter or sensor.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eFor use with the PH-200 or ORP-200\u003c\/li\u003e\n\u003cli\u003eConvenient size\u003c\/li\u003e\n\u003cli\u003eBottle: Combination twist off and eyedropper style cap\u003c\/li\u003e\n\u003cli\u003eMade in Korea\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eTotal Volume: 60 cc\u003c\/li\u003e\n\u003cli\u003eContents: Specially formulated KCl solution for pH and ORP electrodes (sensors)\u003c\/li\u003e\n\u003c\/ul\u003e \u003cb\u003eNOTE: This solution is NOT for calibration. Do not use with a TDS\/EC meter. Never touch the sensor with your fingers.\u003c\/b\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209669309,"sku":"ORP-STOR","price":9.69,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/syvgguha9eewglonp4jd.jpg?v=1775566928"},{"product_id":"hm-digital-psc-154-extended-range-ec-tds-controller-with-4-20ma-output","title":"HM Digital PSC-154 Extended Range EC\/TDS Controller with 4-20mA Output","description":"The\u003cb\u003e HM Digital PSC-154 EC\/TDS \u003c\/b\u003eController reads in an extended range to monitor and control TDS levels for high output commercial systems. If the TDS level rises above the user-set level, an alarm will sound and the unit will open or close a circuit via dry contacts to control a pump, solenoid valve or other external device. External devices must have their own power supply.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eMonitors and controls TDS\/EC level for high output commercial systems.\u003c\/li\u003e\n\u003cli\u003eLarge, bright L.E.D. display\u003c\/li\u003e\n\u003cli\u003e4-20mA output signal can connect to a PLC to record values.\u003c\/li\u003e\n\u003cli\u003eAn alarm will sound if the TDS level rises above the user-set level.\u003c\/li\u003e\n\u003cli\u003eA switch will control a device based upon the set point.\u003c\/li\u003e\n\u003cli\u003eOn-screen temperature display (C\/F).\u003c\/li\u003e\n\u003cli\u003eInstalls easily in minutes\u003c\/li\u003e\n\u003cli\u003eIncludes one sensor probe\u003c\/li\u003e\n\u003cli\u003eOne year warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209702077,"sku":"PSC-154","price":206.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/z4te1jwi4nlboncznvth.jpg?v=1775566928"},{"product_id":"hm-digital-sp-3-dual-tds-sensor-probes-for-dm-2-dual-inline-tds-monitor","title":"HM Digital SP-3 Dual TDS Sensor Probes for DM-2 Dual Inline TDS Monitor","description":"\u003cb\u003eFeatures\u003c\/b\u003e:\u003cul\u003e\n\u003cli\u003eEach sensor has a blue or red wrap and is labeled \"in\" or \"out\"\u003c\/li\u003e\n\u003cli\u003eStainless steel sensors\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eHM Digital SP-3 Dual TDS Sensor Probes Specifications\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSensors:\u003c\/b\u003e Stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProbe:\u003c\/b\u003e 1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCable:\u003c\/b\u003e 45\" shielded cable standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eConnector:\u003c\/b\u003e Dual 4-pin\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209734845,"sku":"HM-SP-3","price":17.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/ldtmtlh4hszmvphai5wc.jpg?v=1775566928"},{"product_id":"hm-digital-psc-60d-dual-inline-ec-tds-monitor","title":"HM Digital PSC-60D Dual Inline EC\/TDS Monitor","description":"The\u003cb\u003e HM Digital PSC-60D Dual\u003c\/b\u003e Inline EC\/TDS Monitor reads in an extended range to monitor and control electrical conductivity (EC) and total dissolved solids (TDS) levels for high output systems (110-220V).\u003cbr\u003e\u003cbr\u003e\u003cb\u003eDual Line.\u003c\/b\u003e The PSC-60D allows for simultaneous monitoring of two separate water lines.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eExtended Range Measurements. \u003c\/b\u003eThe extended range ensures your water supply is pristine due to the monitor's ability to detect a wider range of EC and TDS.\u003cb\u003eOptional Alarm. \u003c\/b\u003eAn optional steady beep can be set to alarm when EC\/TDS levels exceed user-set values.\u003cb\u003e\"Mini\" Monitor. \u003c\/b\u003eThe compact size of the PSC-60D makes installation simple and easy.\u003cb\u003ePower Cord Included.\u003c\/b\u003e The HM Digital PSC-60D features a power cord and other necessary parts that are included at no extra charge.\u003cb\u003eBright Display.\u003c\/b\u003e The bright 5\/8\" LED display on the front of the monitor is easy to read in any situation.\u003cb\u003e\u003cbr\u003e\u003cbr\u003eSpecifications:\u003c\/b\u003e \u003cul\u003e\n\u003cli\u003eWarranty: One year\u003c\/li\u003e\n\u003cli\u003eSetting: On screen buttons\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209767613,"sku":"PSC-60D","price":119.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/mkljd7tkp15m7ovy8cwv.jpg?v=1775566928"},{"product_id":"hm-digital-c1000-tds-and-ec-calibration-nacl-solution-1000-ppm-3oz-89ml","title":"HM Digital C1000 TDS and EC Calibration NaCl Solution - 1000 ppm 3oz\/89ml","description":"\u003cb\u003eFor optimal performance,\u003c\/b\u003e re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges. \u003cbr\u003eThe 342ppm Calibration Solution is designed for use with pure drinking water. The 1000ppm Calibration Solution is designed for use with beverages, aquariums and pools.\u003cbr\u003e\u003cbr\u003e \u003cb\u003eSpecifications:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eNaCl calibration solution\u003c\/li\u003e\n\u003cli\u003eAvailable in 342 ppm or 1000 ppm\u003c\/li\u003e\n\u003cli\u003eSealed with a coated foam liner\u003c\/li\u003e\n\u003cli\u003e3 oz. bottles (88.7 ml)\u003c\/li\u003e\n\u003cli\u003eGood for 5-10 calibrations\u003c\/li\u003e\n\u003cli\u003eShelf life of 6-9 months\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eSolution Conversions:\u003c\/b\u003e\u003cbr\u003e342 NaCl = 362 as KCl 478 as \"442\" 700 µS ----------------------------------------------------------------- 1000 NaCl = 1060 as KCl 1450 as \"442\" 2000 µS","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209800381,"sku":"C1000","price":10.01,"currency_code":"USD","in_stock":true},{"title":"Case of 24","offer_id":46610209833149,"sku":"C1000:24PK","price":228.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/eaczshstgl6bwsgo93wg.jpg?v=1775566928"},{"product_id":"hm-digital-qc-1-quick-check-tds-monitor-1-4-push-in","title":"HM Digital QC-1 Quick Check TDS Monitor 1\/4\" Push-in","description":"With the push of a button the HM Digital QC-1 displays a green or red light, indicating good water quality, or service required, respectively. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eTests for TDS or conductivity levels.\u003c\/li\u003e\n\u003cli\u003eEight programmable set points (by dip switch).\u003c\/li\u003e\n\u003cli\u003eBright LED lights\u003c\/li\u003e\n\u003cli\u003eFactory calibrated to 100 ppm NaCl. Recalibration is unecessary.\u003c\/li\u003e\n\u003cli\u003eExcellent reverse osmosis or deionization monitor\u003c\/li\u003e\n\u003cli\u003eAvailable with 1\/4\" quick connect tee or with no fitting\u003c\/li\u003e\n\u003cli\u003eInstalls quickly and easily\u003c\/li\u003e\n\u003c\/ul\u003e  Use the following formula to calculate the percentage of solids (TDS) that your membrane is removing:","brand":"HM Digital","offers":[{"title":"No Fitting","offer_id":46610209865917,"sku":"QC-1-NF","price":19.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/ungj4bzheybqocrobuwi.jpg?v=1775575786"},{"product_id":"hm-digital-tds-4-pocket-size-tds-meter","title":"HM Digital TDS-4 Pocket Size TDS Meter","description":"\u003cb\u003eFeatures\u003c\/b\u003e:  \u003cul\u003e\n\u003cli\u003eHighly efficient and accurate due to its advanced microprocessor technology\u003c\/li\u003e\n\u003cli\u003eHold function -- saves measurements for convenient reading and recording\u003c\/li\u003e\n\u003cli\u003eAuto-off function -- automatically shuts off meter after 10 minutes of non-use to conserve batteries\u003c\/li\u003e\n\u003cli\u003eDisplay -- large and easy-to-read LCD screen\u003c\/li\u003e\n\u003cli\u003eFactory calibrated -- recalibration is not necessary, but can be done easily with a watch screwdriver\u003c\/li\u003e\n\u003c\/ul\u003e  \u003cb\u003eEasy to Follow Instructions!\u003c\/b\u003e  \u003cbr\u003e  Using a clean cup or glass, take a sample of your raw feed water. Remove the protective cap from the Tester. Push the \"ON\" button to activate LCD display. Submerse the tester's probes into the water sample and observe for approx. 10 seconds. Record the results. Repeat the same procedure with a sample of your reverse osmosis (RO) water. If the system is new or the membrane has been replaced, do not test the first tank of RO water. The first tank of product water will contain sanitizer and possibly carbon fines from your new filters. This will cause false reading. Use the following formula to calculate the percentage of solids (TDS) that your membrane is removing:","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209898685,"sku":"TDS-4","price":19.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/bnthlb07a12evi8ln6tc_709e18e0-ce95-4b51-b5ce-af6dbcb03b72.jpg?v=1775575786"},{"product_id":"pocket-size-tds-meter-w-thermometer","title":"Pocket Size TDS Meter w\/Thermometer","description":"\u003cb\u003eFeatures\u003c\/b\u003e:  \u003cul\u003e\n\u003cli\u003eIncludes an internal digital thermometer\u003c\/li\u003e\n\u003cli\u003eHold function -- saves measurements for convenient reading and recording\u003c\/li\u003e\n\u003cli\u003eAuto-off function -- automatically shuts off meter after 10 minutes of non-use to conserve batteries\u003c\/li\u003e\n\u003cli\u003eDisplay -- large and easy-to-read LCD screen\u003c\/li\u003e\n\u003cli\u003eFactory calibrated -- recalibration is not necessary, but can be done easily with a watch screwdriver\u003c\/li\u003e\n\u003c\/ul\u003e This water quality tester enables you to determine just how good or bad your water really is! This tester accurately measures the TDS level in your water. Ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver. Perfect for both consumer or commercial use.    \u003cbr\u003e\u003cbr\u003e  \u003cb\u003eEasy to Follow Instructions!\u003c\/b\u003e  \u003cbr\u003e  Using a clean cup or glass, take a sample of your raw feed water. Remove the protective cap from the Tester. Push the \"ON\" button to activate LCD display. Submerse the tester's probes into the water sample and observe for approx. 10 seconds. Record the results. Repeat the same procedure with a sample of your reverse osmosis (RO) water. If the system is new or the membrane has been replaced, do not test the first tank of RO water. The first tank of product water will contain sanitizer and possibly carbon fines from your new filters. This will cause false reading. Use the following formula to calculate the percentage of solids (TDS) that your membrane is removing:","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209964221,"sku":"TDS-4TM","price":23.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/uksfxux1dwvlf1nctrhh.jpg?v=1775575749"},{"product_id":"hm-digital-psc-64d-mini-dual-display-ec-tds-monitor-with-4-20ma-output","title":"HM Digital PSC-64D Mini Dual Display EC\/TDS Monitor with 4-20mA Output","description":"The \u003cb\u003eHM Digital PSC-64D EC\/TDS\u003c\/b\u003e Monitor reads in an extended range to monitor TDS levels for high output commercial systems. If the TDS level rises above the user-set level, an alarm will sound and the unit will open or close a circuit via dry contacts to control a pump, solenoid valve or other external device. \u003cbr\u003e \u003cbr\u003e\u003cb\u003eFeatures:\u003c\/b\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\"Mini\" Monitor.\u003c\/b\u003e The HM Digital PSC-64D features a mini display which continuously monitors 2 lines while sending out a 4-20mA output. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExtended Range for Monitoring EC\/TDS\u003c\/b\u003e. The HM Digital PSC-64D features an extended range to monitor both TDS and EC. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePower Cord Included.\u003c\/b\u003e The HM Digital PSC-64D features a power cord and other necessary parts that are included at no extra charge. \u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eWarranty:\u003c\/b\u003e One year\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTemp Range:\u003c\/b\u003e 33 - 167° F\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEC Measurement:\u003c\/b\u003e 0-9999 µS \/ 0-20.00 mS\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTDS Measurement:\u003c\/b\u003e 0 - 9999 ppm\/ 0 - 10.0 ppt\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSettings:\u003c\/b\u003e Controlled by on-screen up\/down buttons\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209931453,"sku":"PSC-64D","price":148.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/a1waja0amdv8zhqexvej.jpg?v=1775566928"},{"product_id":"hm-digital-pph-1000-industrial-ph-controller-with-3-8-sensor-probe","title":"HM Digital PPH-1000 Industrial pH Controller with 3\/8\" Sensor Probe","description":"The \u003cb\u003eHM Digital pH Controller \u003c\/b\u003eis an industrial online monitor and controller of pH levels. The PPH-1000 is used in a variety of water solution treatment applications such as petroleum, chemical, medical, and more.\u003cbr\u003e \u003cbr\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eOn\/Off Alarm:\u003c\/b\u003e An upper limit, lower limit alarm can be set singly or in combination on the PPH-1000 to help monitor pH levels. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSensor Probe Included: \u003c\/b\u003eThe HM Digital PPH-1000 features a 3\/8\" sensor probe that is included at no extra cost. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBright LED Display:\u003c\/b\u003e Temperature and pH levels are easily and clearly read on the controller's bright LED display. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEasy Installation:\u003c\/b\u003e The compact size and light-weight of the PPH-1000 makes installation simple and easy. \u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610209996989,"sku":"PPH-1000","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/vt4gfcyp67uxyweb1gbu.jpg?v=1775566928"},{"product_id":"ph-temp-meter-waterproof","title":"pH \/ Temp Meter Waterproof","description":"\u003cb\u003eFeatures:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eMeasures pH and temperature\u003c\/li\u003e\n\u003cli\u003eAuto-ranging three point calibration with digital fine tuning\u003c\/li\u003e\n\u003cli\u003eIncludes 4 pH buffer solution in a sponge embedded in a clear cap, so you can see if it's dried up\u003c\/li\u003e\n\u003cli\u003eWaterproof housing\u003c\/li\u003e\n\u003cli\u003eSimultaneous temperature display\u003c\/li\u003e\n\u003cli\u003eMeasurement range: 0-14 pH\u003c\/li\u003e\n\u003cli\u003eDigital calibration (push button)\u003c\/li\u003e\n\u003cli\u003eAuto-off function, data-hold function and low-battery indicator\u003c\/li\u003e\n\u003cli\u003eDisplay: Large and easy-to-read LCD screen includes simultaneous temperature reading\u003c\/li\u003e\n\u003cli\u003eFactory calibrated: The PH-200 meter is three-point factory calibrated to 4, 7, and 10 pH. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver\u003c\/li\u003e\n\u003cli\u003eIncludes a cap, batteries, and lanyard\u003c\/li\u003e\n\u003c\/ul\u003e \u003cb\u003eNOTE: Ideal for all pH testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs and scientific testing, pools and spas, ecology testing, boilers and cooling towers, water treatment, wine, coffee, agriculture and more.\u003c\/b\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610210029757,"sku":"PH-200","price":62.83,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/bqj7eb2g8nuaexwuwgec.jpg?v=1775566928"},{"product_id":"hm-digital-lsm-100-commercial-inline-ec-tds-monitor","title":"HM Digital LSM-100 Commercial Inline EC\/TDS Monitor","description":"The\u003cb\u003e HM Digital LSM-100\u003c\/b\u003e is the ideal EC\/TDS monitor for commercial or industrial applications. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eIdeal for Large Scale Systems. \u003c\/b\u003eThe extended battery life as well as 1\/2\" sensor probe makes the LSM-100 ideal for large scale systems in commercial or industrial settings.\u003cbr\u003e\u003cb\u003eExtra Large Screen.\u003c\/b\u003e The extra large LCD display screen is both functional and easy to read from far distances.\u003cbr\u003e\u003cb\u003eBattery Operated. \u003c\/b\u003eThe LSM-100 is battery powered and includes two (2) 1.5V AA batteries at no extra cost.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eIncludes 1\/2\" sensor probe\u003c\/li\u003e\n\u003cli\u003eReads ppm, ppt, µS and mS\u003c\/li\u003e\n\u003cli\u003eBattery Life: Approximately 2 years\u003c\/li\u003e\n\u003cli\u003eWarranty: 1 Year Manufacturer's\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610210062525,"sku":"LSM-100","price":76.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/a0wr911pyechxksoqdls.jpg?v=1775566928"},{"product_id":"hm-digital-sp-1-psc-tds-ec-sensor-probe-for-panel-mounted-controllers","title":"HM Digital SP-1-PSC TDS\/EC Sensor Probe for Panel Mounted Controllers","description":"\u003cb\u003eFeatures:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eTDS\/EC Sensor Probe for panel mounted controllers\u003c\/li\u003e\n\u003cli\u003eDurable plastic probe\u003c\/li\u003e\n\u003cli\u003eStainless steel sensors\u003c\/li\u003e\n\u003cli\u003eHigh quality construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eCompatible With HM Digital Panel Mount Controllers\u003c\/b\u003e\u003cbr\u003e\u003cb\u003eHM Digital SP-1 TDS\/EC Sensor Probe Specifications\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eSensors: stainless steel\u003c\/li\u003e\n\u003cli\u003eProbe: 1\/2\" threaded bushing (detachable from cable)\u003c\/li\u003e\n\u003cli\u003eCable: 3 meter (9.8 ft) shielded cable\u003c\/li\u003e\n\u003cli\u003eConnector: 4-pin\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610210128061,"sku":"HM-SP-1-PSC","price":43.1,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/exgbornfnxm8kn5xjffz.jpg?v=1775566928"},{"product_id":"hm-digital-trm-1-triple-inline-tds-monitor","title":"HM Digital TRM-1 Triple Inline TDS Monitor","description":"The HM Digital TRM-1 is a three sensor TDS monitor that allows you to check TDS at three different points. This is ideal for use in systems that utilize both reverse osmosis and deionization, or for checking multiple points in an RO system. This is a perfect accessory for aquarium enthusiasts, allowing you to quickly and easily determine when to change your RO membrane or DI cartridge.\u003cbr\u003e  \u003cbr\u003e  \u003cb\u003eFeatures:\u003c\/b\u003e  \u003cul\u003e\n\u003cli\u003eAvailable with 1\/4\", 3\/8\" or 1\/2\" quick connect fittings\u003c\/li\u003e\n\u003cli\u003eHighly efficient and accurate due to its advanced microprocessor technology\u003c\/li\u003e\n\u003cli\u003eDisplays TDS levels from 3 different points with electrode probes\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAuto-off function\u003c\/b\u003e -- Automatically shuts off meter after 10 minutes of non-use to conserve battery power\u003c\/li\u003e\n\u003cli\u003eDual range 0-9990 ppm (from 0 - 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm)\u003c\/li\u003e\n\u003cli\u003eFactory calibrated -- HM Digital meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.\u003c\/li\u003e\n\u003cli\u003eInstalls quickly and easily\u003c\/li\u003e\n\u003c\/ul\u003e  Use the following formula to calculate the percentage of solids (TDS) that your membrane is removing:","brand":"HM Digital","offers":[{"title":"1\/2\" Fittings","offer_id":46610210226365,"sku":"TRM-1-50","price":44.86,"currency_code":"USD","in_stock":true},{"title":"1\/4\" Fittings","offer_id":46610210259133,"sku":"TRM-1-25","price":41.29,"currency_code":"USD","in_stock":true},{"title":"3\/8\" Fittings","offer_id":46610210291901,"sku":"TRM-1-38-KIT","price":42.0,"currency_code":"USD","in_stock":true},{"title":"No Fittings","offer_id":46610210324669,"sku":"TRM-1-NF","price":35.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/fzk68jajzmadii76sifg.jpg?v=1775575690"},{"product_id":"hm-digital-c342-tds-and-ec-calibration-solution-342-ppm-nacl-3oz-89ml","title":"HM Digital C342 TDS and EC Calibration Solution - 342 ppm NaCl 3oz\/89mL","description":"For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges. \u003cbr\u003eThe 342ppm Calibration Solution is designed for use with pure drinking water. The 1000ppm Calibration Solution is designed for use with beverages, aquariums and pools.\u003cbr\u003e\u003cbr\u003e \u003cb\u003eSpecifications:\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eNaCl calibration solution\u003c\/li\u003e\n\u003cli\u003eAvailable in 342 ppm or 1000 ppm\u003c\/li\u003e\n\u003cli\u003eSealed with a coated foam liner\u003c\/li\u003e\n\u003cli\u003e3 oz. bottles (88.7 mL)\u003c\/li\u003e\n\u003cli\u003eGood for 5-10 calibrations\u003c\/li\u003e\n\u003cli\u003eShelf life of 6-9 months\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eSolution Conversions:\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e342 NaCl = 362 as KCl 478 as \"442\" 700 µS ----------------------------------------------------------------- 1000 NaCl = 1060 as KCl 1450 as \"442\" 2000 µS","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610210357437,"sku":"C342","price":9.0,"currency_code":"USD","in_stock":true},{"title":"Case of 36","offer_id":46610210390205,"sku":"C342:36PK","price":307.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/ori8rvr5fjo0uysshvvn.jpg?v=1775566928"},{"product_id":"hm-digital-dm-1-dual-tds-meter","title":"HM Digital DM-1 Dual TDS Meter","description":"This water quality tester accurately measures the TDS level in your tap (feed) water and purified (product) water. It enables you to determine just how good or bad your water really is! Use the meter to determine when the reverse osmosis membrane needs replacing. \u003cbr\u003e  \u003cbr\u003e  \u003cb\u003eSpecifications:\u003c\/b\u003e  \u003cul\u003e\n\u003cli\u003eAvailable with 1\/4\" and\/or 3\/8\" quick connect fittings. The DM-1-NF does not come with fittings.\u003c\/li\u003e\n\u003cli\u003eHighly efficient and accurate due to its advanced microprocessor technology\u003c\/li\u003e\n\u003cli\u003eDisplays TDS levels of the feed water and product water with in and out electrode probes\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAuto-off function\u003c\/b\u003e -- Automatically shuts off meter after 10 minutes of non-use to conserve battery power\u003c\/li\u003e\n\u003cli\u003eDual range 0-9990 ppm (from 0 - 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image)\u003c\/li\u003e\n\u003cli\u003eFactory calibrated -- HM Digital meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.\u003c\/li\u003e\n\u003cli\u003eInstalls quickly and easily\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"1\/4\" Feed x 1\/4\" Product","offer_id":46610210488509,"sku":"DM-1-2525","price":28.1,"currency_code":"USD","in_stock":true},{"title":"No Fittings","offer_id":46610210521277,"sku":"DM-1-NF","price":34.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/kd3bgeh0pwpyrauejzmq.jpg?v=1775575621"},{"product_id":"hm-digital-scm-1000-sugar-refractometer","title":"HM Digital SCM-1000 Sugar Refractometer","description":"The \u003cb\u003eHM Digital SCM-1000 monitors Brix,\u003c\/b\u003e and temperature, in order to effectively measure sugar concentration. It features water resistance, allowing it to be washed with flowing water. It can store up to 20 measurements, allowing for easy data storing and reading.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e\u003ci\u003eHighly Accurate Monitor. \u003c\/i\u003e\u003c\/strong\u003eThe SCM-1000 monitors Brix, and temperature levels. There is automatic temperature compensation (ATC) to ensure high accuracy temperature readings.\u003cbr\u003e\u003cstrong\u003e\u003ci\u003eAuto-adjusting brightness.\u003c\/i\u003e\u003c\/strong\u003e The SCM-1000 features an automatically adjusting LCD brightness display, allowing you to easily read the screen in any lighting.\u003cbr\u003e\u003cstrong\u003e\u003ci\u003eEasy calibration. \u003c\/i\u003e\u003c\/strong\u003eThe SCM-1000 features an automatic calibration, needing only a drop of distilled water.\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMeasurement Units:\u003c\/b\u003e Brix\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMeasurement Range:\u003c\/b\u003e 0.00%-55.00%\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eResolution:\u003c\/b\u003e 0.1%\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAccuracy:\u003c\/b\u003e ±0.2%\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTemperature Compensation:\u003c\/b\u003e ATC (50-140°F) \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBacklight:\u003c\/b\u003e Automatic Brightness Control (20 seconds) \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAuto Shut-off:\u003c\/b\u003e After 2 minutes\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMeasurement Time:\u003c\/b\u003e less than 3 seconds\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIdle sample volume: \u003c\/b\u003e0.5ml\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUsage Environment: \u003c\/b\u003e10 -40°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePower source:\u003c\/b\u003e 1.5V x 2 (AAA Alkaline) \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSize:\u003c\/b\u003e 58(W) x 36(D) x 122(H) mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWeight:\u003c\/b\u003e 149g\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HM Digital","offers":[{"title":"Single","offer_id":46610260656317,"sku":"SCM-1000","price":210.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2434\/4509\/files\/cxawzy5vx3uu7ams3agy.jpg?v=1775568432"},{"product_id":"orp-200-waterproof-orp-meter","title":"ORP-200 Waterproof ORP Meter","description":"Oxidation reduction potential (also known as redox potential, oxidation \/ oxidation potential, or ORP) is a measure of water's ability to gain or lose electrons in chemical reactions. Just as the transfer of hydrogen ions in water determines the pH level, the transfer of electrons in water determines the ORP value. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e \u003cul\u003e\n\u003cli\u003eMeasures oxidation reduction potential (redox) and temperature\u003c\/li\u003e\n\u003cli\u003eAuto-ranging calibration with digital fine tuning\u003c\/li\u003e\n\u003cli\u003eIncludes 4 pH buffer solution in a sponge embedded in a clear cap, so you can see if it's dried up\u003c\/li\u003e\n\u003cli\u003eWaterproof housing\u003c\/li\u003e\n\u003cli\u003eSimultaneous temperature display\u003c\/li\u003e\n\u003cli\u003eMeasurement range: -999 to +1000 mV\u003c\/li\u003e\n\u003cli\u003eDigital calibration (push button)\u003c\/li\u003e\n\u003cli\u003eAuto-off function, data-hold function and low-battery indicator.\u003c\/li\u003e\n\u003cli\u003eDisplay: large and easy-to-read LCD screen includes simultaneous temperature reading.\u003c\/li\u003e\n\u003cli\u003eFactory calibrated: the ORP-200 meter is factory calibrated to +200 mV. The meter can be easily recalibrated with digital calibration using the push buttons, rather than a screwdriver.\u003c\/li\u003e\n\u003cli\u003eIncludes a cap, batteries, and lanyard\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eNOTE: The ORP value of a water supply is directly related to the effect it has on plumbing and bacteria growth. The life expectancy of bacteria in water is more dependent on the ORP value than the chlorine concentration or pH value. 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