HM Digital QC-1 TDS & Conductivity Monitor

HM Digital QC-1 TDS & Conductivity Monitor

The HM Digital QC-1 TDS & Conductivity Monitor is a monitor that checks your water for conductivity levels and TDS (total dissolved solids). more

$20

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HM Digital (TDS-3) Handheld Digital TDS & Temperature Meter/Monitor

HM Digital (TDS-3) Handheld Digital TDS & Temperature Meter/Monitor

Ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver. Perfect for both consumer or commercial use. Perfect for aquarium owners - salt water fish, fresh water fish or reefs! Carry one in... more

$37.19

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HM Digital (DM-1) Residential Inline Dual TDS Meter/Monitor; 1/4" JG

HM Digital (DM-1) Residential Inline Dual TDS Meter/Monitor; 1/4" JG

Measure the tap water coming in vs. the purified water going out of your system at any time. Use the monitor to determine when the filters need to be changed. Install the meter for your customers so they'll always know how their system is performing.... more

$45.35

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HM Digital DM-2 Dual In-Line TDS Monitor DM-2

HM Digital DM-2 Dual In-Line TDS Monitor DM-2

Determine how efficient your reverse osmosis unit is performing with a push of a button. HM Digital DM-2 Dual In-Line TDS Monitor is a "must have" for any aquarists who produces their own RO (reverse osmosis) water for aquarium use. Once installed to... more

$45.50

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HM Digital (PM-2) External In-Line TDS Purity Monitor 1/4" Quick Connect

HM Digital (PM-2) External In-Line TDS Purity Monitor 1/4" Quick Connect

This is a single inline TDS/purity meter which monitors any water purification system. It has an audible alert when the system requires service or maintenance. Features: Single line internal TDS monitor - great for most water purification systems which... more

$93.99

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HM DM-1 In-Line Dual TDS Monitor

HM DM-1 In-Line Dual TDS Monitor

The HM DM-1 In-Line Dual TDS Monitor allows you to measure the tap water going into your filteration system versus the filtered water coming out of your system at any time. Stop guessing the performance of your filtration system with the DM1! more

$29

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HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range , 1 ppm Resolution, +/- 3% Readout Accuracy

HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range , 1 ppm Resolution, +/- 3% Readout Accuracy

Product Description: A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water. With... more

$14.97

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APEC Water Systems RO-90 Top Tier, Reverse Osmosis Drinking Water Filter System with HM Digital TDS-EZ Water Quality TDS Tester

APEC Water Systems RO-90 Top Tier, Reverse Osmosis Drinking Water Filter System with HM Digital TDS-EZ Water Quality TDS Tester

Top tier brand of authentic US built, high performance drinking water system provides refreshing crisp taste, superior to bottled water. Highest grade 5-Stage ultra-pure system with 100% US Made, NSF certified filters to guarantee water safety & your... more

$323.50

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HM Digital SP-1 TDS - EC Sensor Probe for Panel Mounted Controllers

HM Digital SP-1 TDS - EC Sensor Probe for Panel Mounted Controllers

SP-1 Features: -Connector: 4 pin. -Sensor Material: Stainless steel. -Pin: Yes. -Probes: 1/2'' threaded bushing (detachable from cable). -Size: 1/2'' threaded bushing. -Cable: 9.8 ft (3 meter) shielded cable sensor. Product Type: -Faucet mount. Filter... more

$61.76

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HM Digital DM-2 In-Line Dual TDS Monitor

HM Digital DM-2 In-Line Dual TDS Monitor

The HM Digital DM-2 In-Line Dual TDS Monitor is a water tester which is used to test the amount of total dissolved solids (TDS) in water. It is a new model of the HM DM-1 In-Line Dual TDS Monitor. more

$36

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HM Digital Meters FM-1 Water Filtration System Monitor for Five StaSystems

HM Digital Meters FM-1 Water Filtration System Monitor for Five StaSystems

NRA1006 Features Water filtration monitor Timer Range: 0-999 days/months Timer Modes: Days or months (default is months) Settings: One alert per stage up to five stages Default Settings: 12 months Battery Life: Approximately 18 months Product Type:... more

$67.84

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TDS-3 Handheld TDS meter - HMDTDS3

TDS-3 Handheld TDS meter - HMDTDS3

Highly efficient and accurate. Comes with an advanced microprocessor technology. Measurement range of 0-9990 ppm. Includes a carrying case with belt clip. Ideal for commercial use. Weighs 0.3 lbs.. Measures: 7L x 3W x 3H in.. About Hydrofarm,... more

$27.66

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TDS-3 Handheld TDS meter - HMDTDS3

TDS-3 Handheld TDS meter - HMDTDS3

Highly efficient and accurate. Comes with an advanced microprocessor technology. Measurement range of 0-9990 ppm. Includes a carrying case with belt clip. Ideal for commercial use. Weighs 0.3 lbs.. Measures: 7L x 3W x 3H in.. About Hydrofarm,... more

$27.66

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HM Digital TDS-3 Handheld TDS meter

HM Digital TDS-3 Handheld TDS meter

"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! Features: Ideal for commercial use.... more

$38.87

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"HM Digital TDS-EZ Water Quality TDS Meter Tester"

"HM Digital TDS-EZ Water Quality TDS Meter Tester"

"The HM TDS EZ Water Quality Tester, the best value meter on the market, tests the quality of your tap and drinking water, and is ideal for all basic water testing applications. This device is priceless for both homeowners and business owners. Its... more

$15.59

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HM Digital TDS-4 Pocket Size TDS Tester

HM Digital TDS-4 Pocket Size TDS Tester

$21.00

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"HM Digital TDS-4 Water Quality TDS Meter Tester"

"HM Digital TDS-4 Water Quality TDS Meter Tester"

"HM Digital TDS-4 (Total Dissolved Solids) Water Quality TDS Meter Tester that''s ideal for all water purification applications, drinking water testing, pools and spas, fresh water aquariums, hydroponics, and colloidal silver. its sleek design Perfect... more

$21.00

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HM Digital TDS-EZ Handheld TDS Meter

HM Digital TDS-EZ Handheld TDS Meter

HM Digital TDS-EZ Handheld TDS Meter. The HM Digital TDS-EZ Handheld TDS Meter is ideal for all basic water testing applications especially for testing the performance of your reverse osmosis system. Use the TDS-EZ to measure total dissolved solids to... more

$16.29

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"HM Digital TDS-3 Water Quality TDS Meter Tester"

"HM Digital TDS-3 Water Quality TDS Meter Tester"

"HM Digital TDS-3 Water Quality TDS Meter Tester with Carrying Case. Ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver. Perfect for both consumer or commercial use. Carry one in your... more

$22.20

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PS-100 HM Digital Panel Mount TDS Controller

PS-100 HM Digital Panel Mount TDS Controller

Install the Panel Mount Controller to constantly monitor TDS levels of water produced by a high-output system. Features: Monitors and controls TDS levels for high output commercial systems. Large, bright L.E.D. disp more

$144.95

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PS-200 HM Digital Panel Mount Dual TDS Controller

PS-200 HM Digital Panel Mount Dual TDS Controller

Install the Dual TDS Controller to constantly monitor TDS levels of water produced by a high-output system. Immediately know if the TDS levels rise above an acceptable level. Features: Monitors and controls TDS levels of two more

$174.95

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PS-202 HM Digital Panel Mount Dual Display Dual TDS Controller

PS-202 HM Digital Panel Mount Dual Display Dual TDS Controller

The PS-202 allows for continuous and simultaneous monitoring and control of TDS levels on two water lines. Features: Simultaneously monitors and controls the TDS levels of two water lines (e.g., the feed water and product wat more

$194.95

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HM Digital Waterproof EC/TDS/Temp HydroTester

HM Digital Waterproof EC/TDS/Temp HydroTester

"The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. Features: Measures electrical... more

$59.13

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"HM Digital Handheld TDS-3 Tester"

"HM Digital Handheld TDS-3 Tester"

" Ideal for commercial use. Includes a carrying case with belt clip. Highly efficient and accurate due to its advanced microprocessor technology. Hold Function: saves measurements for convenient reading and recording. Auto-off function: the meter shuts... more

$29.56

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HM Digital HMDCOM80 - EC/TDS/Temp HydroTester Meter

HM Digital HMDCOM80 - EC/TDS/Temp HydroTester Meter

Brand HM Digital - MPN Part No. HMDCOM80 - Battery Type 1 3V Button Cell Included - Length 6 in. - Height 0.6 in. - Width 1.3 in. - more

$36.35

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HM Digital TDS-3 Handheld Meter with Carrying Case

HM Digital TDS-3 Handheld Meter with Carrying Case

$24.95

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HM Digital COM-100 Waterproof EC/TDS/Temp Combo Meter

HM Digital COM-100 Waterproof EC/TDS/Temp Combo Meter

$64.94

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"HM Digital Aquapro TDS Water Tester"

"HM Digital Aquapro TDS Water Tester"

" Measures total dissolved solids (TDS) and temperature. Automatic Temperature Compensation (ATC) Water-resistant housing Measurement Range: 0-5000 ppm Digital Calibration (push button) Auto-off function, data-hold function and low-battery indicator.... more

$34.36

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"HM Digital Water Resistant Ec/TDS Meter w/ Temperature in C/F Hydrotester (Model COM-80)"

"HM Digital Water Resistant Ec/TDS Meter w/ Temperature in C/F Hydrotester (Model COM-80)"

" Measures electrical conductivity (EC), total dissolved solids (TDS). Exellent for nutrient testing. Four scales: EC: µS, mS; TDS: ppm, ppt Automatic Temperature Compensation (ATC) Water resistant Measurement Range: 0-9990 µS; 0-5000 ppm; 0-9.9 mS;... more

$38.36

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HM Digital TDS-3 Handheld TDS Meter With Carrying Case

HM Digital TDS-3 Handheld TDS Meter With Carrying Case

TDS-3 is the most widely used handheld TDS meter in the world according to HM Digital who holds the original patent for this meter. Beware of imitators, none offer the superior performance of the original TDS-3.TDS-3 Meters measure the amount of Total... more

$24.98

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AP-1 AquaPro Water Quality Total Dissolved Solids Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy (Magnetic Body), Measures total dissolved.., By HM Digital

AP-1 AquaPro Water Quality Total Dissolved Solids Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy (Magnetic Body), Measures total dissolved.., By HM Digital

Water-resistant housingAutomatic Temperature Compensation (ATC)Measures total dissolved solids (TDS) and temperatureDigital Calibration (push button)Magnetic body - store the meter on your fridge when not in use! more

$30.59

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HM Digital Handheld TDS-3 Tester

HM Digital Handheld TDS-3 Tester

HM Digital Handheld TDS-3 TesterIdeal for commercial use. Includes a carrying case with belt clip. Highly efficient and accurate due to its advanced microprocessor technology. Hold Function: saves measurements for convenient reading and recording.... more

$36.95

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Digital TDS Meter Tester Pen Tap Bottled Water Quality Filter Purity Monitor

Digital TDS Meter Tester Pen Tap Bottled Water Quality Filter Purity Monitor

Features100% brand new and high qualityAutomatic shutdown: automatically shut down after 10 minutesReasonable design: the pen electrode can be directly inserted into in the drinking water bottleFast test: due to the exquisite type sensors, 2-6 seconds... more

$8.59

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Sennotech (B TDS-3/8) Before & After Meter Digital TDS Monitor; 3/8 Comp

Sennotech (B TDS-3/8) Before & After Meter Digital TDS Monitor; 3/8 Comp

Quick and accurate way of knowing your TDS Features Measures and displays TDS values before and after water flows through treatment system. Real time calculation of removal rate. Removal rate indicator: 80% Green Flash Removal Rate < 80% Red Flash... more

$45.28

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Lynxtech HM Digital AP-1 AquaPro TDS Meter,Water Quality Total Dissolved Soli...

Lynxtech HM Digital AP-1 AquaPro TDS Meter,Water Quality Total Dissolved Soli...

Product Description: How Pure is Your Water? A TDS meter (aka ppm pen, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or mineral in the... more

$23.99

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Digital TDS Meter Tester Pen Tap Bottled Water Quality Filter Purity Monitor

Digital TDS Meter Tester Pen Tap Bottled Water Quality Filter Purity Monitor

Features:100% brand new and high qualityAutomatic shutdown: automatically shut down after 10 minutesReasonable design: the pen electrode can be directly inserted into in the drinking water bottleFast test: due to the exquisite type sensors, 2-6 seconds... more

$8.59

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Digital TDS Meter Tester Pen Tap Bottled Water Quality Filter Purity Monitor

Digital TDS Meter Tester Pen Tap Bottled Water Quality Filter Purity Monitor

Features:100% brand new and high qualityAutomatic shutdown: automatically shut down after 10 minutesReasonable design: the pen electrode can be directly inserted into in the drinking water bottleFast test: due to the exquisite type sensors, 2-6 seconds... more

$8.59

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Digital TDS Meter Tester Pen Tap Bottled Water Quality Filter Purity Monitor

Digital TDS Meter Tester Pen Tap Bottled Water Quality Filter Purity Monitor

Features100% brand new and high qualityAutomatic shutdown: automatically shut down after 10 minutesReasonable design: the pen electrode can be directly inserted into in the drinking water bottleFast test: due to the exquisite type sensors, 2-6 seconds... more

$7.99

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Digital TDS Meter Tester Pen Tap Bottled Water Quality Filter Purity Monitor

Digital TDS Meter Tester Pen Tap Bottled Water Quality Filter Purity Monitor

Features100% brand new and high qualityAutomatic shutdown: automatically shut down after 10 minutesReasonable design: the pen electrode can be directly inserted into in the drinking water bottleFast test: due to the exquisite type sensors, 2-6 seconds... more

$8.59

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Commercial Water Distributing HM-DIGITAL-C-342 Digital Calibration Solution

Commercial Water Distributing HM-DIGITAL-C-342 Digital Calibration Solution

FeaturesWater tester solution and tds meter calibration solution- SKU: CWD5635 more

$14.04 $10.30

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