{"title":"Parts : Residential RO Parts : TDS Meters","description":"","products":[{"product_id":"com-100-hm-digital-ec-tds-temperature-waterproof-meter","title":"COM-100 HM Digital EC TDS \u0026 Temperature Waterproof Meter","description":"\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch3\u003eCOM-100 HM Digital EC TDS \u0026amp; Temperature Waterproof Meter\u003c\/h3\u003e\n\u003cp\u003eIdeal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs \u0026amp; scientific testing, pools \u0026amp; spas, ecology testing, boilers \u0026amp; cooling towers, water treatment and more.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch3\u003eFEATURES\u003c\/h3\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 housing (IP-67 rating)\u003c\/li\u003e\n\u003cli\u003eMeasurement Range: 0-9990 µS; 0-8560 ppm (auto-ranging).\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 COM-100 meter is calibrated with a 1413 µS solution. 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\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/Meter_Comparison_COM100.pdf?v=1712068095\" target=\"_blank\"\u003eSee how the COM-100 stacks up against the competition.\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEC Range: 0 - 9990 µS\u003c\/li\u003e\n\u003cli\u003eTDS Range: 0-8560 ppm (mg\/L)\u003c\/li\u003e\n\u003cli\u003eTemperature Range: 0-55 °C; 32-130 °F\u003c\/li\u003e\n\u003cli\u003eResolution: 0-99: 0.1 µS\/ppm; 100-999: 1 µS\/ppm; 1000-9990: 10 µS\/ppm. Temp. resolution is 0.1 °C\/F\u003c\/li\u003e\n\u003cli\u003eAccuracy: +\/- 2%\u003c\/li\u003e\n\u003cli\u003eEC to TDS Conversion Factor: Non-linear conversions for KCl, 442TM or NaCl solutions, set by the user.\u003c\/li\u003e\n\u003cli\u003eCalibration: Digital calibration by push button.\u003c\/li\u003e\n\u003cli\u003eProbe: Detachable platinum electrodes\u003c\/li\u003e\n\u003cli\u003eHousing: IP-67 Waterproof (submersible; floats)\u003c\/li\u003e\n\u003cli\u003ePower source: 3 x 1.5V button cell batteries (included)\u003c\/li\u003e\n\u003cli\u003eDimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches)\u003c\/li\u003e\n\u003cli\u003eWeight: 90.7g (3.2 oz)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":44959038669104,"sku":"201-COM-100","price":74.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/201-com-100-Base-78600.jpg?v=1747756827"},{"product_id":"hm-digital-dm-1-tds-monitor-1-4-inlet-outlet","title":"HM Digital DM-1 TDS Monitor - 1\/4\" Inlet \/ Outlet","description":"\u003cdiv class=\"large-12 columns\"\u003e \u003ch4\u003eThe HM Digital DM-1 Digital TDS Monitor is The Perfect Way To Monitor the Quality of Your RO Water\u003c\/h4\u003e \u003ch3\u003eFeatures:\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eAuto-Off function conserves battery power\u003c\/li\u003e \u003cli\u003eDual Range 0-9990 ppm (From 0 - 999 ppm the resolution is 1 ppm.\u003c\/li\u003e \u003cli\u003eFrom 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image)\u003c\/li\u003e \u003cli\u003eComes equipped with John Guest Quick-Connect 1\/4\" T-fittings as shown. Installs quickly and easily.\u003c\/li\u003e \u003cli\u003eMeasures the tap water coming in vs. the purified water going out of your system at any time.\u003c\/li\u003e \u003cli\u003eUse the monitor to determine when the membrane need to be changed.\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":44959038800176,"sku":"201-DM-1","price":49.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/201-dm-1-Base-48505.jpg?v=1747756827"},{"product_id":"ec-3-hm-digital-conductivity-meter-with-carrying-case","title":"EC-3 HM Digital Conductivity Meter With Carrying Case","description":"\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch4\u003eIdeal for all water purification applications, waste water regulation, aquaculture, hydroponics, and colloidal silver. Perfect for both consumer or commercial use. Carry one in your pocket or toolbox at all times!\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIdeal for commercial use.\u003c\/li\u003e\n\u003cli\u003eIncludes a carrying case with belt clip.\u003c\/li\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: the meter shuts off automatically after 10 minutes of non-use to conserve batteries.\u003c\/li\u003e\n\u003cli\u003eMeasurement Range: 0-9990 µS. From 0-999 µS, the resolution is in increments of 1 µS. From 1000 to 9990 µS, the resolution is in increments of 10 µS, indicated by a blinking 'x10' image.\u003c\/li\u003e\n\u003cli\u003eBuilt-in digital thermometer\u003c\/li\u003e\n\u003cli\u003eDisplay: large and easy-to-read LCD screen.\u003c\/li\u003e\n\u003cli\u003eFactory Calibrated: our meters are calibrated with a 700 µS NaCl solution.\u003c\/li\u003e\n\u003cli\u003eMeters can be recalibrated with a mini-screwdriver.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRange: 0 - 9990 µS (µS\/cm)\u003c\/li\u003e\n\u003cli\u003eTemp. Range: 0 - 80° Celsius\u003c\/li\u003e\n\u003cli\u003eResolution: 1 µS 10 µS, 0.1 degree Celsius\u003c\/li\u003e\n\u003cli\u003eAccuracy: +\/- 2%\u003c\/li\u003e\n\u003cli\u003eATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50° C (33 to 122° F)\u003c\/li\u003e\n\u003cli\u003ePower source: 2 x 1.5V button cell batteries (included)\u003c\/li\u003e\n\u003cli\u003eBattery life: 1000 hours of usage\u003c\/li\u003e\n\u003cli\u003eDimensions: 15.5 x 3.1 x 2.3cm (6.1 x 1.25 x 1 inches)\u003c\/li\u003e\n\u003cli\u003eWeight with case: 76.5g (2.7 oz)\u003c\/li\u003e\n\u003cli\u003eWeight without case: 56.7g (2 oz)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":44959038865712,"sku":"201-EC-3","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/201-ec-3-Base-95458_a19dbf8c-0c6b-4a75-8db4-457719adc6f1.jpg?v=1747756827"},{"product_id":"hm-digital-qc-1-quick-check-tds-monitor","title":"HM Digital QC-1 Quick Check TDS Monitor","description":"\u003cdiv class=\"large-12 columns\"\u003e \u003ch4\u003eHM Digital QC-1 Quick Check TDS Monitor\u003c\/h4\u003e \u003ch3\u003eFeatures\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eWith the push of a button, the unit displays a green or red light, indicating good water quality or service required, respectively.\u003c\/li\u003e \u003cli\u003eTests for TDS levels.\u003c\/li\u003e \u003cli\u003eEight programmable set points (by dip switch).\u003c\/li\u003e \u003cli\u003eBright LED lights.\u003c\/li\u003e \u003cli\u003eSimple to use.\u003c\/li\u003e \u003cli\u003eFactory Calibrated to 100 ppm NaCl. Re-calibration is unncessary.\u003c\/li\u003e \u003cli\u003eComes equipped with 1\/4 inch Quick-Connect T-fitting.\u003c\/li\u003e \u003cli\u003eExcellent Reverse Osmosis (RO) monitor.\u003c\/li\u003e \u003cli\u003eInstalls quickly and easily.\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"large-12 columns\"\u003e \u003ch3\u003eSpecifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eTDS\/EC Range: 0-5000 ppm\u003c\/li\u003e \u003cli\u003eMax. Set Point: 50 ppm\u003c\/li\u003e \u003cli\u003eAccuracy: +-3%\u003c\/li\u003e \u003cli\u003eATC: No\u003c\/li\u003e \u003cli\u003eCable Length: 24.5\" (including sensor)\u003c\/li\u003e \u003cli\u003eFittings: 1\/4\u003c\/li\u003e \u003cli\u003ePower source: 4 x 1.5V button cell batteries (389-A) (included)\u003c\/li\u003e \u003cli\u003eBattery life: Approx. one year\u003c\/li\u003e \u003cli\u003eSize: 7.6 x 2 x 4.7 cm (3 x .8 x 1.9 in.)\u003c\/li\u003e \u003cli\u003eWeight: 39.7 g (1.4 oz.) (not including sensor)\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":44959040209200,"sku":"201-QC-1-14","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/Generated_Image_January_22_2026_-_2_54PM.jpg?v=1769190309"},{"product_id":"ps-202-hm-digital-panel-mount-dual-display-dual-tds-controller","title":"PS-203 HM Digital Panel Mount Dual Display Dual TDS Controller","description":"\u003cdiv class=\"large-12 columns\"\u003e   \u003ch4\u003eThe PS-202 allows for continuous and simultaneous monitoring and control of TDS levels on two water lines.\u003c\/h4\u003e   \u003ch3\u003eFeatures\u003c\/h3\u003e   \u003cul\u003e   \u003cli\u003eSimultaneously monitors and controls the TDS levels of two water lines (e.g., the feed water and product water) for high output commercial systems.\u003c\/li\u003e   \u003cli\u003eLarge, bright L.E.D. displays.\u003c\/li\u003e   \u003cli\u003eAn alarm will sound if the TDS level rises above the user-set level for both lines.\u003c\/li\u003e   \u003cli\u003eInstalls easily in minutes.\u003c\/li\u003e   \u003cli\u003eIncludes two 1\/2\" sensor probes.\u003c\/li\u003e   \u003c\/ul\u003e   \u003c\/div\u003e   \u003cdiv class=\"large-12 columns\"\u003e   \u003ch3\u003eSpecifications\u003c\/h3\u003e   \u003cul\u003e   \u003cli\u003eRange: 0 - 999ppm\u003c\/li\u003e   \u003cli\u003eAccuracy: +-2%\u003c\/li\u003e   \u003cli\u003eConversion Factor: NaCl (avg. 0.5)\u003c\/li\u003e   \u003cli\u003eResolution: 1 PPM\u003c\/li\u003e   \u003cli\u003eATC: Yes (1 - 65 degrees Celsius)\u003c\/li\u003e   \u003cli\u003eCalibration: Adjustable\u003c\/li\u003e   \u003cli\u003eSetting: Controlled by on-screen up\/down buttons\u003c\/li\u003e   \u003cli\u003eRelay Control: The unit will open or close a circuit via dry contacts when the ppm level of the output water (line 2) or input water (line 1) reaches or exceeds its control setting (simple switch). The PS-202 can be used to control one or two pumps, solenoid valves or other device.\u003c\/li\u003e   \u003cli\u003eRelay Voltage: 5V\u003c\/li\u003e   \u003cli\u003eAlarm: Steady beep for both lines\u003c\/li\u003e   \u003cli\u003eDisplay: Bright 5\/8\" L.E.D. dual displays\u003c\/li\u003e   \u003cli\u003e2 Probes: 1\/2\" bushing, 3 meter (9.8 ft) shielded cable\u003c\/li\u003e   \u003cli\u003ePower supply: AC 110V \/ AC 220V\u003c\/li\u003e   \u003cli\u003eDimensions: 9.4 x 9.4 x 12.5 cm (3.7 x 3.7 x 4.9 in.)\u003c\/li\u003e   \u003cli\u003eMonitor Weight: 569.8 g (1 lb 4.1 oz)\u003c\/li\u003e   \u003cli\u003eTotal Weight: 938.4 g (2 lbs 1.1 oz)\u003c\/li\u003e   \u003c\/ul\u003e \u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":44959041487152,"sku":"211-PS-203","price":319.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/ps-202-hm-digital-panel-mount-dual-display-dual-tds-controller.media.01.jpg?v=1747756826"},{"product_id":"psc-150-hm-digital-panel-mount-extended-range-ec-tds-controller","title":"PSC-150 HM Digital Panel Mount Extended Range EC \u0026 TDS Controller","description":"\u003cdiv class=\"large-12 columns\"\u003e   \u003ch4\u003eNew controller includes extended range, digital calibration, on-screen temperature and tri-color display.\u003c\/h4\u003e \u003ch3\u003eFeatures\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eMonitors and controls TDS levels for high output commercial systems.\u003c\/li\u003e \u003cli\u003eLarge, bright L.E.D. display.\u003c\/li\u003e \u003cli\u003eAn alarm will sound if the TDS level rises above the user-set level.\u003c\/li\u003e \u003cli\u003eOn-screen temperature display (C\/F).\u003c\/li\u003e \u003cli\u003eInstalls easily in minutes.\u003c\/li\u003e \u003cli\u003eIncludes one sensor probe.\u003c\/li\u003e \u003cli\u003eProtective cover also available (sold separately)\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e \u003cdiv class=\"large-12 columns\"\u003e \u003ch3\u003eSpecifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eEC Range: 0-9999 µS\u003c\/li\u003e \u003cli\u003eTDS Range: 0 - 5000 ppm\u003c\/li\u003e \u003cli\u003eTemperature Range: 1-75°C; 33-167°F\u003c\/li\u003e \u003cli\u003eAccuracy: ±2%\u003c\/li\u003e \u003cli\u003eConversion Factor: NaCl (avg. 0.5)\u003c\/li\u003e \u003cli\u003eResolution: 0.1 µS\/ppm (0-999); 1 µS\/ppm (1000-9999)\u003c\/li\u003e \u003cli\u003eATC: Yes (1 - 65°C)\u003c\/li\u003e \u003cli\u003eCalibration: Adjustable (manual)\u003c\/li\u003e \u003cli\u003eSetting: Controlled by on-screen up\/down buttons\u003c\/li\u003e \u003cli\u003eRelay Control: The unit will open or close a circuit via dry contacts when the ppm\/µS level reaches or exceeds the control setting (simple switch). It can be used to control a pump, solenoid valve or other device.\u003c\/li\u003e \u003cli\u003eRelay Voltage: 5V\u003c\/li\u003e \u003cli\u003eAlarm: Optional steady beep (set by user)\u003c\/li\u003e \u003cli\u003eDisplay: Bright 5\/8\" L.E.D. display\u003c\/li\u003e \u003cli\u003eProbe: 1\/2\" bushing, 3 meter (9.8 ft) shielded cable\u003c\/li\u003e \u003cli\u003ePower supply: AC 110V \/ AC 220V\u003c\/li\u003e \u003cli\u003eDimensions: 7.2 x 7.2 x 10.2 cm (2.8 x 2.8 x 4 in.)\u003c\/li\u003e \u003cli\u003eMonitor Weight: 476 g (1 lb .8 oz)\u003c\/li\u003e \u003cli\u003eTotal Weight: 680.4 g (1 lb 8 oz)\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":44959041585456,"sku":"211-PSC-150","price":239.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/211-psc-150-Base-54614_1c0cb3c2-a32f-4311-877e-2b156c593eca.jpg?v=1747756826"},{"product_id":"psc-154-hm-digital-panel-mount-ec-tds-controller-with-4-20ma-output","title":"PSC-154 HM Digital Panel Mount EC \u0026 TDS Controller With 4-20mA Output","description":"\u003cdiv class=\"large-12 columns\"\u003e   \u003ch4\u003eNew controller includes extended range, digital calibration, on-screen temperature, tri-color display and 4-20mA output.\u003c\/h4\u003e   \u003ch3\u003eFeatures\u003c\/h3\u003e   \u003cul\u003e   \u003cli\u003eMonitors and controls TDS\/EC levels for high output commercial systems.\u003c\/li\u003e   \u003cli\u003eLarge, bright L.E.D. display.\u003c\/li\u003e   \u003cli\u003e4-20mA output signal can connect to a PLC to record values.\u003c\/li\u003e   \u003cli\u003eAn alarm will sound if the TDS \/EC level rises above the user-set level.\u003c\/li\u003e   \u003cli\u003eA switch will control a device based upon the set point.\u003c\/li\u003e   \u003cli\u003eOn-screen temperature display (C\/F).\u003c\/li\u003e   \u003cli\u003eInstalls easily in minutes.\u003c\/li\u003e   \u003cli\u003eIncludes one sensor probe.\u003c\/li\u003e   \u003cli\u003eProtective cover also available (sold separately)\u003c\/li\u003e   \u003c\/ul\u003e   \u003c\/div\u003e   \u003cdiv class=\"large-12 columns\"\u003e   \u003ch3\u003eSpecifications\u003c\/h3\u003e   \u003cul\u003e   \u003cli\u003eEC Range: 0-9999 µS\u003c\/li\u003e   \u003cli\u003eTDS Range: 0 - 5000 ppm\u003c\/li\u003e   \u003cli\u003eTemperature Range: 1-75°C; 33-167 °F\u003c\/li\u003e   \u003cli\u003eAccuracy: ±2% (of the reading)\u003c\/li\u003e   \u003cli\u003eConversion Factor: NaCl (avg. 0.5)\u003c\/li\u003e   \u003cli\u003eResolution: 0.1 µS\/ppm (0-999); 1 µS\/ppm (1000-9999)\u003c\/li\u003e   \u003cli\u003eATC: Yes (1 - 65°C)\u003c\/li\u003e   \u003cli\u003eCalibration: Digital by push button\u003c\/li\u003e   \u003cli\u003eSet-Point: Single point, controlled by on-screen up\/down buttons (to any point within the range)\u003c\/li\u003e   \u003cli\u003eRelay Control: The unit will open or close a circuit via dry contacts when the ppm\/µS level reaches or exceeds the control setting (simple switch). It can be used to control a pump, solenoid valve or other device.\u003c\/li\u003e   \u003cli\u003eRelay Voltage: 5V\u003c\/li\u003e   \u003cli\u003eOutput Signal: Digital 4-20mA\u003c\/li\u003e   \u003cli\u003eOutput Accuracy (mA): ±1%\u003c\/li\u003e   \u003cli\u003eAlarm: Optional steady beep (set by user)\u003c\/li\u003e   \u003cli\u003eDisplay: Bright 5\/8\" L.E.D. display\u003c\/li\u003e   \u003cli\u003eProbe: 1\/2\" bushing, 3 meter (9.8 ft) shielded cable\u003c\/li\u003e   \u003cli\u003ePower supply: AC 110V \/ AC 220V\u003c\/li\u003e   \u003cli\u003eDimensions: 7.2 x 7.2 x 10.2 cm (2.8 x 2.8 x 4 in.)\u003c\/li\u003e   \u003cli\u003eMonitor Weight: 476 g (1 lb .8 oz)\u003c\/li\u003e   \u003cli\u003eTotal Weight: 680.4 g (1 lb 8 oz)\u003c\/li\u003e   \u003c\/ul\u003e \u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":44959042011440,"sku":"211-PSC-154","price":289.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/211-psc-154-Base-98980_f3e470fd-0278-401f-a429-f31fde66a1ab.jpg?v=1747756826"},{"product_id":"hm-digital-dm-1-tds-monitor-1-4-inlet-3-8-outlet","title":"HM Digital DM-1 TDS Monitor - 1\/4\" Inlet \/ 3\/8\" Outlet","description":"\u003cdiv class=\"large-12 columns\"\u003e \u003ch4\u003eThe HM Digital DM-1 Digital TDS Monitor is The Perfect Way To Monitor the Quality of Your RO Water\u003c\/h4\u003e \u003ch3\u003eFeatures:\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eAuto-Off function conserves battery power\u003c\/li\u003e \u003cli\u003eDual Range 0-9990 ppm (From 0 - 999 ppm the resolution is 1 ppm.\u003c\/li\u003e \u003cli\u003eFrom 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image)\u003c\/li\u003e \u003cli\u003eComes equipped with John Guest Quick-Connect 1\/4\" and 3\/8\" T-fittings as shown. Installs quickly and easily.\u003c\/li\u003e \u003cli\u003eMeasures the tap water coming in vs. the purified water going out of your system at any time.\u003c\/li\u003e \u003cli\u003eUse the monitor to determine when the membrane need to be changed.\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":45113163448624,"sku":"201-DM-1-14-38","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/201-dm-1-14-38-Base-98292_22287d29-1487-4614-9aa6-11e1e94d9ccc.jpg?v=1747756272"},{"product_id":"hm-digital-commercial-in-line-dual-tds-monitor-with-1-2-tee-fittings-dm-3","title":"DM-3 HM Digital Commercial In-Line Dual EC\/TDS Monitor - 1\/2\" Tee Fittings","description":"\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch4\u003eInstall on industrial systems such as car washes, window washing, manufacturing, and food processing.\n\u003c\/h4\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-2b88e3c\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eHighly efficient and accurate due to its advanced microprocessor technology\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-7652a3f\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eDisplays TDS levels of the Feed Water and Product Water with in \u0026amp; out electrode probes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-23fb89c\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eFactory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. The DM-3 features digital calibration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-787a1bd\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eDiagnostic error messaging\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-3c01dec\"\u003e\n\u003cspan class=\"stad-classic-list-item-content\"\u003eShielded sensor cables\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eComes equipped with 1\/2\" Quick-Connect T-fittings. Also available with 3\/8\" or 1\/4\" fittings.\u003c\/li\u003e\n\u003cli\u003eInstalls quickly and easily.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDifferences from the DM-1 and DM-2\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for commercial\/industrial applications\u003c\/li\u003e\n\u003cli\u003eStronger, water-resistant casing\u003c\/li\u003e\n\u003cli\u003eDigital calibration can be done individually on each line.\u003c\/li\u003e\n\u003cli\u003eImproved design, including an extra-large, easy-to-read LCD display\u003c\/li\u003e\n\u003cli\u003eLonger, waterproof, shielded cables\u003c\/li\u003e\n\u003cli\u003eVariable mounting bracket\u003c\/li\u003e\n\u003cli\u003eALL-NEW slim design\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange:\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eEC:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0~9999μS\/0~9.99mS \u003cbr\u003e\u003cstrong\u003eTDS:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0~5000ppm\/ 0~5ppt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eEC:\u003c\/strong\u003e\u003cbr\u003e0.1μS (0~99.9)\u003cbr\u003e1μS (100~999)\u003cbr\u003e10μS (1000~9990)\u003cbr\u003e0.01mS (0.00~9.99)\u003cbr\u003e\u003cstrong\u003eTDS:\u003c\/strong\u003e\u003cbr\u003e0.1ppm (0~99.9)\u003cbr\u003e1ppm (100~999)\u003cbr\u003e10ppm (1000~5000)\u003cbr\u003e0.01 ppt (0.00~5.00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e±2%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConversion Factor:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNaCl (avg. 0.5)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e1.2m \/3.9ft, shielded cables\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDual, 1\/4″ diameter for quick-connect fittings (model SP-3, included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Calibration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDigitally factory calibrated to NaCl 342 ppm. Re-calibration can be done separately for each line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e2 x AA batteries (included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e11.6 x 1.9 x 7.0 cm (4.6 x 0.7 x 2.8 in)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e225 g (7.9 oz.)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":45113171476784,"sku":"211-DM-3-12","price":69.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/DM3_Dual_MonitorR2.png?v=1777513927"},{"product_id":"hm-digital-commercial-in-line-dual-tds-monitor-with-3-8-tee-fittings-dm-3","title":"DM-3 HM Digital Commercial In-Line Dual EC\/TDS Monitor - 3\/8\" Tee Fittings","description":"\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch4\u003eInstall on industrial systems such as car washes, window washing, manufacturing, and food processing.\n\u003c\/h4\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-2b88e3c\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eHighly efficient and accurate due to its advanced microprocessor technology\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-7652a3f\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eDisplays TDS levels of the Feed Water and Product Water with in \u0026amp; out electrode probes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-23fb89c\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eFactory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. The DM-3 features digital calibration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-787a1bd\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eDiagnostic error messaging\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-3c01dec\"\u003e\n\u003cspan class=\"stad-classic-list-item-content\"\u003eShielded sensor cables\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eComes equipped with 3\/8\" Quick-Connect T-fittings. Also available with 1\/4\" or 1\/2\" fittings.\u003c\/li\u003e\n\u003cli\u003eInstalls quickly and easily.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDifferences from the DM-1 and DM-2\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for commercial\/industrial applications\u003c\/li\u003e\n\u003cli\u003eStronger, water-resistant casing\u003c\/li\u003e\n\u003cli\u003eDigital calibration can be done individually on each line.\u003c\/li\u003e\n\u003cli\u003eImproved design, including an extra-large, easy-to-read LCD display\u003c\/li\u003e\n\u003cli\u003eLonger, waterproof, shielded cables\u003c\/li\u003e\n\u003cli\u003eVariable mounting bracket\u003c\/li\u003e\n\u003cli\u003eALL-NEW slim design\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange:\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eEC:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0~9999μS\/0~9.99mS \u003cbr\u003e\u003cstrong\u003eTDS:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0~5000ppm\/ 0~5ppt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eEC:\u003c\/strong\u003e\u003cbr\u003e0.1μS (0~99.9)\u003cbr\u003e1μS (100~999)\u003cbr\u003e10μS (1000~9990)\u003cbr\u003e0.01mS (0.00~9.99)\u003cbr\u003e\u003cstrong\u003eTDS:\u003c\/strong\u003e\u003cbr\u003e0.1ppm (0~99.9)\u003cbr\u003e1ppm (100~999)\u003cbr\u003e10ppm (1000~5000)\u003cbr\u003e0.01 ppt (0.00~5.00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e±2%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConversion Factor:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNaCl (avg. 0.5)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e1.2m \/3.9ft, shielded cables\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDual, 1\/4″ diameter for quick-connect fittings (model SP-3, included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Calibration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDigitally factory calibrated to NaCl 342 ppm. Re-calibration can be done separately for each line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e2 x AA batteries (included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e11.6 x 1.9 x 7.0 cm (4.6 x 0.7 x 2.8 in)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e225 g (7.9 oz.)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":45113171542320,"sku":"211-DM-3-38","price":68.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/DM3_Dual_Monitor.png?v=1748623826"},{"product_id":"us-water-systems-pro-tds-ec-meter","title":"US WATER SYSTEMS PRO TDS METER","description":"\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch4\u003eHandheld TDS meter with a sleek design that's perfect for today's modern kitchen\u003c\/h4\u003e\n\u003cp\u003eThis TDS meter is the next generation for today's tech-savvy and health-conscience consumer. If you have a reverse osmosis system, how do you know when to change the membrane? The answer is \"You don't... unless you have a TDS meter.\" Everyday we are shocked to hear people ask if their membrane should be replaced and they have no idea of what their water quality might be. A TDS meter to measure your water quality is as important as the Reverse Osmosis System itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch3\u003eFEATURES\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMeasures total dissolved solids (TDS) and temperature.\u003c\/li\u003e\n\u003cli\u003eAutomatic Temperature Compensation (ATC)\u003c\/li\u003e\n\u003cli\u003eWater-resistant housing\u003c\/li\u003e\n\u003cli\u003eMeasurement Range: 0-4999 ppm\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 color coded backlit display.\u003c\/li\u003e\n\u003cli\u003eFactory Calibrated: The US Water TDS Meter is calibrated with a 342 ppm NaCl solution. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver.\u003c\/li\u003e\n\u003cli\u003eIncludes a cap and batteries.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMeasurement Range: 0-4999 ppm\u003c\/li\u003e\n\u003cli\u003eTemperature Range: 0-80°C; 32-176°F\u003c\/li\u003e\n\u003cli\u003eResolution: 1 ppm; Temp. resolution is 0.1°C\/F\u003c\/li\u003e\n\u003cli\u003eAccuracy: +\/- 2%\u003c\/li\u003e\n\u003cli\u003eConversion Factor: NaCl (avg. 0.5)\u003c\/li\u003e\n\u003cli\u003eCalibration: Digital calibration by push button.\u003c\/li\u003e\n\u003cli\u003eHousing: Water-resistant\u003c\/li\u003e\n\u003cli\u003ePower source: 1 x 3V button cell (included) (model CR2032)\u003c\/li\u003e\n\u003cli\u003eDimensions: 16.2 x 2.9 x 1.6 cm (6.4 x 1.2 x .6 inches)\u003c\/li\u003e\n\u003cli\u003eWeight: 42.5 g (1.5 oz)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"US Water Systems Inc","offers":[{"title":"Default Title","offer_id":45113424511280,"sku":"201-USW-TDS3","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/Untitled-1.png?v=1756368208"},{"product_id":"dm-3-hm-digital-commercial-in-line-dual-ec-tds-monitor-1-4-tee-fittings","title":"DM-3 HM Digital Commercial In-Line Dual EC\/TDS Monitor - 1\/4\" Tee Fittings","description":"\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch4\u003eInline conductivity meter that can be used on commercial water treatment systems such as car washes, window washing, manufacturing, and food processing.\u003c\/h4\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-2b88e3c\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eHighly efficient and accurate due to its advanced microprocessor technology\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-7652a3f\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eDisplays TDS levels of the Feed Water and Product Water with in \u0026amp; out electrode probes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-23fb89c\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eFactory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. The DM-3 features digital calibration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-787a1bd\"\u003e\u003cspan class=\"stad-classic-list-item-content\"\u003eDiagnostic error messaging\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"stad-classic-list-item elementor-repeater-item-3c01dec\"\u003e\n\u003cspan class=\"stad-classic-list-item-content\"\u003eShielded sensor cables\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eComes equipped with 1\/4\" Quick-Connect T-fittings. Also available with 3\/8\" or 1\/2\" fittings.\u003c\/li\u003e\n\u003cli\u003eInstalls quickly and easily.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eDifferences from the DM-1 and DM-2\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for commercial\/industrial applications\u003c\/li\u003e\n\u003cli\u003eStronger, water-resistant casing\u003c\/li\u003e\n\u003cli\u003eDigital calibration can be done individually on each line.\u003c\/li\u003e\n\u003cli\u003eImproved design, including an extra-large, easy-to-read LCD display\u003c\/li\u003e\n\u003cli\u003eLonger, waterproof, shielded cables\u003c\/li\u003e\n\u003cli\u003eVariable mounting bracket\u003c\/li\u003e\n\u003cli\u003eALL-NEW slim design\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"large-12 columns\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange:\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eEC:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0~9999μS\/0~9.99mS \u003cbr\u003e\u003cstrong\u003eTDS:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0~5000ppm\/ 0~5ppt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eEC:\u003c\/strong\u003e\u003cbr\u003e0.1μS (0~99.9)\u003cbr\u003e1μS (100~999)\u003cbr\u003e10μS (1000~9990)\u003cbr\u003e0.01mS (0.00~9.99)\u003cbr\u003e\u003cstrong\u003eTDS:\u003c\/strong\u003e\u003cbr\u003e0.1ppm (0~99.9)\u003cbr\u003e1ppm (100~999)\u003cbr\u003e10ppm (1000~5000)\u003cbr\u003e0.01 ppt (0.00~5.00)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e±2%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConversion Factor:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNaCl (avg. 0.5)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e1.2m \/3.9ft, shielded cables\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDual, 1\/4″ diameter for quick-connect fittings (model SP-3, included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Calibration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDigitally factory calibrated to NaCl 342 ppm. Re-calibration can be done separately for each line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e2 x AA batteries (included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e11.6 x 1.9 x 7.0 cm (4.6 x 0.7 x 2.8 in)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e225 g (7.9 oz.)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"US Water Systems","offers":[{"title":"Default Title","offer_id":49857753874736,"sku":"211-DM-3","price":59.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3221\/1504\/files\/DM3_Dual_Monitor.png?v=1748623826"}],"url":"https:\/\/uswatersystems.com\/collections\/tds-meters.oembed?page=2","provider":"US Water Systems","version":"1.0","type":"link"}