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Exclusive Hm Digital Deals and Offers

From timeless classics to modern breakthroughs—discover what Hm Digital has in store.

HM DigitalTriple Inline RO/DI TDS Monitor with 1/4 inch T-Fittings

HM DigitalTriple Inline RO/DI TDS Monitor with 1/4 inch T-Fittings

4.2
$ 122.00
HM Digital tds ez Meter, Purple, 0-9990 ppm. Measurement Range

HM Digital tds ez Meter, Purple, 0-9990 ppm. Measurement Range

4.3
$ 82.00
HM Digital COM-80: EC/TDS Hydrotester (TDS+Conductivity Meter)

HM Digital COM-80: EC/TDS Hydrotester (TDS+Conductivity Meter)

4.1
$ 84.00
Hm Digital Tds-3 Tds Meter Original - Plastic, White

Hm Digital Tds-3 Tds Meter Original - Plastic, White

3.9
$ 38.00
HM Digital Ap-1 Tds Meter: AquaPro Water Tester with Thermometer and Plastic Care Box

HM Digital Ap-1 Tds Meter: AquaPro Water Tester with Thermometer and Plastic Care Box

4.3
$ 39.00
HM Digital COM-100 HMDCOM100 Waterproof EC/TDS And Amp Temperature Combo Meter, 2.1" x 2.9" x 8.9", White/Purple

HM Digital COM-100 HMDCOM100 Waterproof EC/TDS And Amp Temperature Combo Meter, 2.1" x 2.9" x 8.9", White/Purple

4.3
$ 184.00
HM Digital AquaPro Handheld Water Total Dissolved Solids Tester - HM-DIGITAL-AP-1

HM Digital AquaPro Handheld Water Total Dissolved Solids Tester - HM-DIGITAL-AP-1

4.2
$ 96.00
HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue

HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue

4.5
$ 46.00
HM Digital pH Meter pH-80 Hydrotester LCD Display With Auto Calibration & Temperature Display

HM Digital pH Meter pH-80 Hydrotester LCD Display With Auto Calibration & Temperature Display

3.7
$ 94.00
HM DigitalTDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy

HM DigitalTDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy

4.3
$ 172.00
HM Digital DM-1 in-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy

HM Digital DM-1 in-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy

4.6
$ 101.00
HM Digital 342ppm TDS Calibration Solution (a.k.a Water Testing Solution) 3 fl oz (90 ml)

HM Digital 342ppm TDS Calibration Solution (a.k.a Water Testing Solution) 3 fl oz (90 ml)

4.5
$ 70.00
HM Digital PH-200 Waterproof pH Meter, 0-14.00 pH Range, 0.01 pH Resolution, +/- 0.02 pH Readout Accuracy

HM Digital PH-200 Waterproof pH Meter, 0-14.00 pH Range, 0.01 pH Resolution, +/- 0.02 pH Readout Accuracy

4.4
$ 221.00
HMDPHM80 Digital pH/Temperature Meter

HMDPHM80 Digital pH/Temperature Meter

4.3
$ 76.00
HM Digital TDS-3 TDS Meter Handheld tds Tester With Large LCD Screen Includes ATC Temperature Reading Testing For Hydroponics Gardening Aquariums Reefs Pools Spas Water Treatment

HM Digital TDS-3 TDS Meter Handheld tds Tester With Large LCD Screen Includes ATC Temperature Reading Testing For Hydroponics Gardening Aquariums Reefs Pools Spas Water Treatment

4.5
$ 94.00
HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy

HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy

4.6
$ 64.00
HM DigitalPH-80 Digital pH/Temperature Meter

HM DigitalPH-80 Digital pH/Temperature Meter

4.1
$ 161.00
HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy

HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy

4.5
$ 94.00
HM Digital TDS3 TDS-3 Pocket TDS Meter Water Tester Meter with Leather Carry Case and Temperature Display

HM Digital TDS3 TDS-3 Pocket TDS Meter Water Tester Meter with Leather Carry Case and Temperature Display

4.1
$ 37.00
HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy,Purple

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

4.5
$ 65.00
HM DIGITAL TDS Meters TDS-3 Handheld Temperature TDS (PPM) Tester, 0-9990 ppm, 1 ppm Resolution, 2% Readout Accuracy Testing Water Quality For Hydroponics Aquariums Pools Drinking etc

HM DIGITAL TDS Meters TDS-3 Handheld Temperature TDS (PPM) Tester, 0-9990 ppm, 1 ppm Resolution, 2% Readout Accuracy Testing Water Quality For Hydroponics Aquariums Pools Drinking etc

4.1
$ 10.72
HM DigitalPH-80 pH Meter Waterproof PH80 Tester HydroTester

HM DigitalPH-80 pH Meter Waterproof PH80 Tester HydroTester

4.3
$ 174.00
HM Digital AP-1 AquaPro Water Quality Total Dissolved Solids Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy (Magnetic Body)

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

4.3
$ 99.00
HM Digital AP-1 AquaPro Water Quality Total Dissolved Solids Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy

HM Digital AP-1 AquaPro Water Quality Total Dissolved Solids Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy

4.2
$ 39.00
HM Digital TDS-3 Handheld TDS Meter with Carrying Case

HM Digital TDS-3 Handheld TDS Meter with Carrying Case

4.1
$ 40.00
HM DIGITAL AP-1 Handheld TDS Meter Tester With Large LCD Screen Includes ATC Temperature Reading Magnetic Body Testing For Hydroponics Gardening Aquariums Reefs Pools Spas Water Treatment Drinking Pure Filter system

HM DIGITAL AP-1 Handheld TDS Meter Tester With Large LCD Screen Includes ATC Temperature Reading Magnetic Body Testing For Hydroponics Gardening Aquariums Reefs Pools Spas Water Treatment Drinking Pure Filter system

4.4
$ 90.00
HM Digital Com-300 Ph/Tds/EC/Temp Meter

HM Digital Com-300 Ph/Tds/EC/Temp Meter

4.0
$ 395.00
HM Digital COM-100 Waterproof EC/TDS/Temp Meter

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

4.3
$ 211.00
HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy,Blue & White

HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy,Blue & White

4.6
$ 79.00
HM Digital PH Meter PH-80 Handheld Water Resistant Water Quality Tester Pen With ATC For Hydroponics Gardening Aquariums Reefs Pools Spas Water Treatment Drinking Water

HM Digital PH Meter PH-80 Handheld Water Resistant Water Quality Tester Pen With ATC For Hydroponics Gardening Aquariums Reefs Pools Spas Water Treatment Drinking Water

4.0
$ 53.12
HM Digital COM-100 Waterproof EC/TDS/TEMP Meter

HM Digital COM-100 Waterproof EC/TDS/TEMP Meter

4.4
$ 215.00
HM DigitalHM-100 PH/EC/TDS/Temp Monitor Wall Mounted For Water Testing Aquarium Garden Pond Care Aquatic

HM DigitalHM-100 PH/EC/TDS/Temp Monitor Wall Mounted For Water Testing Aquarium Garden Pond Care Aquatic

$ 331.21
HM Digital 716160 COM-100 WATERPROOF PROFESSIONAL SERIES Combo Meter, 7", White/Purple

HM Digital 716160 COM-100 WATERPROOF PROFESSIONAL SERIES Combo Meter, 7", White/Purple

4.4
$ 61.86
HM Digital EC-3 Handheld Conductivity Tester and Thermometer with Case

HM Digital EC-3 Handheld Conductivity Tester and Thermometer with Case

4.3
$ 96.00
HM DigitalWater Quality TDS Meter HM Digital TDS-4TM

HM DigitalWater Quality TDS Meter HM Digital TDS-4TM

$ 84.00
HM Digital SM-1 In-Line Single TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy

HM Digital SM-1 In-Line Single TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy

4.4
$ 92.00
HM Digital C-342 TDS / EC Calibration Solution

HM Digital C-342 TDS / EC Calibration Solution

4.4
$ 65.00
HM DIGITAL PH Meter PH-200 Replacement Sensor SP-P2

HM DIGITAL PH Meter PH-200 Replacement Sensor SP-P2

4.0
$ 162.00
HM Digital Triple Inline RO/DI TDS Monitor with 1/4 inch T-Fittings

HM Digital Triple Inline RO/DI TDS Monitor with 1/4 inch T-Fittings

4.2
$ 137.00
HM Digital DM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy

HM Digital DM-2 Commercial In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accuracy

4.2
$ 135.00
HM Digital DM-2 tds Inline-Dual TDS commercial measuring device for testing hydroponics, gardening, aquarium, reefs, pools, spas, water treatment, drinking water filter systems

HM Digital DM-2 tds Inline-Dual TDS commercial measuring device for testing hydroponics, gardening, aquarium, reefs, pools, spas, water treatment, drinking water filter systems

4.6
$ 155.00
HM Digital PH-STOR pH Electrode Storage Solution for Use with PH-200 or PH-80, 60cc Volume

HM Digital PH-STOR pH Electrode Storage Solution for Use with PH-200 or PH-80, 60cc Volume

4.6
$ 67.00
Flow Meter Digital Water Timer s TDS-100H-HS+HM Flow Meter Flowmeter W/Bracket Transducer Simple and Flexible Programming

Flow Meter Digital Water Timer s TDS-100H-HS+HM Flow Meter Flowmeter W/Bracket Transducer Simple and Flexible Programming

$ 2,774.82
HM DigitalTRM-1, 3X 1/4" Tee, Triple Inline TDS PPM Monitor/Meter

HM DigitalTRM-1, 3X 1/4" Tee, Triple Inline TDS PPM Monitor/Meter

4.4
$ 125.00
HM Digital AP-2 Handheld Water Electrical Conductivity Tester

HM Digital AP-2 Handheld Water Electrical Conductivity Tester

4.5
$ 89.00
HM DigitalPH-200 PH Meter, White, 3.3" x 8.5" x 2"

HM DigitalPH-200 PH Meter, White, 3.3" x 8.5" x 2"

4.3
$ 236.00
HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy

HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy

4.4
$ 142.00
HM Digital TRM-1, 3X 1/4" Tee, Triple Inline TDS PPM Monitor/Meter

HM Digital TRM-1, 3X 1/4" Tee, Triple Inline TDS PPM Monitor/Meter

4.5
$ 48.65
HM DIGITAL in-Line Single TDS Monitor SM-1 0-9990 ppm Accuracy +/-2% for Water Filtration System,RO Systems,Coolers,More

HM DIGITAL in-Line Single TDS Monitor SM-1 0-9990 ppm Accuracy +/-2% for Water Filtration System,RO Systems,Coolers,More

4.6
$ 121.00
HM Digital PH-STOR pH Electrode Storage Solution for Use with PH-200 or PH-80, 60cc Volume

HM Digital PH-STOR pH Electrode Storage Solution for Use with PH-200 or PH-80, 60cc Volume

4.7
$ 42.00
Flow Meter, Digital Flow Meters TDS-100H-HS+HM(DN15-700mm) Ultrasonic Flow Meter Flowmeter W/Bracket Transducer for Water, Diesel, Gasoline, and Other Liquids

Flow Meter, Digital Flow Meters TDS-100H-HS+HM(DN15-700mm) Ultrasonic Flow Meter Flowmeter W/Bracket Transducer for Water, Diesel, Gasoline, and Other Liquids

$ 1,638.75
TDS / °F / pH / EC continuous controller HM Digital Hydromaster (HM-500)

TDS / °F / pH / EC continuous controller HM Digital Hydromaster (HM-500)

$ 445.11
HM DIGITAL In-line Single TDS Monitor

HM DIGITAL In-line Single TDS Monitor

3.5
$ 74.00
HM Digital, TDS-EZ, tds meter, handheld, TDS meter tester with LCD screen test, hydroponics gardening, aquariums, reefs, pools spas, drink pure water, purifier system

HM Digital, TDS-EZ, tds meter, handheld, TDS meter tester with LCD screen test, hydroponics gardening, aquariums, reefs, pools spas, drink pure water, purifier system

4.1
$ 87.00
HM Digital COM-360 Waterproof pH/EC/TDS/Temp Meter Water Quality Tester Meter With Carrying Case and One Year Warranty

HM Digital COM-360 Waterproof pH/EC/TDS/Temp Meter Water Quality Tester Meter With Carrying Case and One Year Warranty

$ 499.00
HM Digital AP 1 TDS Meter (White)

HM Digital AP 1 TDS Meter (White)

4.4
$ 44.00
HM Digital Single TDS Sensor Probe for tds measuring

HM Digital Single TDS Sensor Probe for tds measuring

4.0
$ 4.45
Commercial in-Line Dual TDS Monitor

Commercial in-Line Dual TDS Monitor

3.8
$ 252.00
HM Digital EC-3 (EC) Conductivity Meter for Testing Water For Reverse Osmosis Drinking Water

HM Digital EC-3 (EC) Conductivity Meter for Testing Water For Reverse Osmosis Drinking Water

4.7
$ 129.00
HM DigitalLBS-10 LeakBlock Sensor

HM DigitalLBS-10 LeakBlock Sensor

$ 189.00
HM Digital PSC-154 TDS/EC Controller with 4-20mA Output, 0-9999 µS Measurement Range, 0.1 µS/ppm Resolution, -2% Readout Accuracy

HM Digital PSC-154 TDS/EC Controller with 4-20mA Output, 0-9999 µS Measurement Range, 0.1 µS/ppm Resolution, -2% Readout Accuracy

$ 2,669.00
HM Digital Inline Dual Conductivity Meter - Measures in PPM, Meter for Desktop, Laptop, 2 AA Batteries Required, Package Quantity 1

HM Digital Inline Dual Conductivity Meter - Measures in PPM, Meter for Desktop, Laptop, 2 AA Batteries Required, Package Quantity 1

4.0
$ 183.00
Medidor / Probador Waterproof de pH / EC / TDS / ºC HM Digital (COM-300)

Medidor / Probador Waterproof de pH / EC / TDS / ºC HM Digital (COM-300)

3.9
$ 238.86
HM Digital HydroMaster Portable/Wall Mount/Bench Continuous pH/EC/TDS/Temp

HM Digital HydroMaster Portable/Wall Mount/Bench Continuous pH/EC/TDS/Temp

$ 959.00
HM Digital pH80 Digital pH/Temp Meter With One Year Warranty HM pH-80 Meter

HM Digital pH80 Digital pH/Temp Meter With One Year Warranty HM pH-80 Meter

3.2
$ 129.00
TDS Conducti Activity Meter/Tester for Reverse Osmosis HM Digital TDS)

TDS Conducti Activity Meter/Tester for Reverse Osmosis HM Digital TDS)

4.1
$ 82.00
HM DigitalAP-2 AquaPro Water Quality Tester

HM DigitalAP-2 AquaPro Water Quality Tester

4.1
$ 86.00
HM Digital Meters HMDTDS3 3 Handheld TDS Meter

HM Digital Meters HMDTDS3 3 Handheld TDS Meter

$ 25.42
HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter

HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter

3.6
$ 407.00
Flowmeters Digital Flow Meters TDS-100H-HS+HM(DN15-700mm) Ultrasonic Flow Meter Flowmeter W/Bracket Transducer

Flowmeters Digital Flow Meters TDS-100H-HS+HM(DN15-700mm) Ultrasonic Flow Meter Flowmeter W/Bracket Transducer

$ 1,727.09
HM DigitalHydroMaster HM-500

HM DigitalHydroMaster HM-500

$ 541.72
HanchenUltrasonic Flow Meter with HM Sensor (DN50-700mm) Digital Pipe Liquid Flowmeter for Seawater Alcohol Industrial Sewage River Water

HanchenUltrasonic Flow Meter with HM Sensor (DN50-700mm) Digital Pipe Liquid Flowmeter for Seawater Alcohol Industrial Sewage River Water

$ 1,338.71
HM Digital HM-100 PH/EC/TDS/Temp Monitor Wall Mounted For Water Testing Aquarium Garden Pond Care Aquatic

HM Digital HM-100 PH/EC/TDS/Temp Monitor Wall Mounted For Water Testing Aquarium Garden Pond Care Aquatic

$ 1,659.00
HM Digital AquaPro AP-2 Conductivity EC Meter

HM Digital AquaPro AP-2 Conductivity EC Meter

3.8
$ 36.62
HM Digital COM-80 EC/TDS Hydro Tester Handheld Pen Meter Testing Water Quality µs mS ppm PPT Measuring Kydroponics & Gardening, Pools & Spas, Aquariums & Reef Tanks, Water Ionizers, Drinking Water

HM Digital COM-80 EC/TDS Hydro Tester Handheld Pen Meter Testing Water Quality µs mS ppm PPT Measuring Kydroponics & Gardening, Pools & Spas, Aquariums & Reef Tanks, Water Ionizers, Drinking Water

3.7
$ 180.00
HM Digital pH-80 pH Meter Hydrotester (WITH ONE YEAR WARRANTY)

HM Digital pH-80 pH Meter Hydrotester (WITH ONE YEAR WARRANTY)

$ 126.00
Themisto TDS-30 Digital TDS Meter, Water Quality Tester, 0-9990ppm

Themisto TDS-30 Digital TDS Meter, Water Quality Tester, 0-9990ppm

3.8
$ 20.00
HM Digital HydroMaster portable with pH, EC, TDS and Temperature (HM-200)

HM Digital HydroMaster portable with pH, EC, TDS and Temperature (HM-200)

$ 372.16
KONVIO NEER Imported Digital LCD TDS Meter for RO Water Filter Tester and Measuring with Carry Case - Off White

KONVIO NEER Imported Digital LCD TDS Meter for RO Water Filter Tester and Measuring with Carry Case - Off White

4.2
$ 22.00
KAMSTEALTH Hm-01 Ac Square Digital Gauge Hour Meter AC 220-240 V

KAMSTEALTH Hm-01 Ac Square Digital Gauge Hour Meter AC 220-240 V

3.4
$ 34.00
HM DIGITAL PPH-1000 Single Line pH/Temp Controller With 2 Years Warranty Digital pH Meter…

HM DIGITAL PPH-1000 Single Line pH/Temp Controller With 2 Years Warranty Digital pH Meter…

$ 488.46
HM DIGITAL PSC-50 Single Line TDS/EC Mini Controller With One Year Warranty Digital TDS Meter…

HM DIGITAL PSC-50 Single Line TDS/EC Mini Controller With One Year Warranty Digital TDS Meter…

$ 154.32
HM DIGITAL TRM-1 Triple In-Line TDS Monitor

HM DIGITAL TRM-1 Triple In-Line TDS Monitor

$ 59.96
HM Digital DM-3 Commercial In-Line Dual EC/TDS Monitor With One Year Warranty

HM Digital DM-3 Commercial In-Line Dual EC/TDS Monitor With One Year Warranty

$ 292.00
HM Digital COM100 Waterproof EC/TDS And Temperature Combo Meter

HM Digital COM100 Waterproof EC/TDS And Temperature Combo Meter

4.4
$ 215.00
HM Digital India Smart Digital Refractometer Sugar Quality Tester Handheld Refractometer With Removable Protective Case

HM Digital India Smart Digital Refractometer Sugar Quality Tester Handheld Refractometer With Removable Protective Case

$ 829.00
HM Digital ORP-200 Waterproof ORP Meter Measures Oxidation Reduction Potential and Temperature

HM Digital ORP-200 Waterproof ORP Meter Measures Oxidation Reduction Potential and Temperature

3.6
$ 574.00
HM DIGITAL AP-2: AquaPro Water Quality Tester (EC)

HM DIGITAL AP-2: AquaPro Water Quality Tester (EC)

3.9
$ 55.00
HM DIGITAL HM-500 HydroMaster pH/EC/TDS/Temp Continuous Monitor With 3 Years Warranty Hydrometer…

HM DIGITAL HM-500 HydroMaster pH/EC/TDS/Temp Continuous Monitor With 3 Years Warranty Hydrometer…

4.0
$ 1,179.00
THEMISTOThemisto TH-TDS10 Digital TDS Meter

THEMISTOThemisto TH-TDS10 Digital TDS Meter

4.2
$ 13.00
HM DIGITAL PS-50D Dual Display TDS/EC Lines Controller With One Year Warranty Digital TDS Meter

HM DIGITAL PS-50D Dual Display TDS/EC Lines Controller With One Year Warranty Digital TDS Meter

1
$ 424.00
"Yokins Hour Meter HM-2R 100-240V AC - Square Digital Gauge or Time Totalizer in LCD display with RESET Button "

"Yokins Hour Meter HM-2R 100-240V AC - Square Digital Gauge or Time Totalizer in LCD display with RESET Button "

$ 43.00
HM Digital Tds Water Testing Meter, Tds-4

HM Digital Tds Water Testing Meter, Tds-4

4.1
$ 10.00
Konvio Neer Imported Tds Meter, Total Dissolved Solids Meter, Water Quality Tester, Ppm Tester For Water Testing - White

Konvio Neer Imported Tds Meter, Total Dissolved Solids Meter, Water Quality Tester, Ppm Tester For Water Testing - White

4.3
$ 18.00
Yokins Hour Meter HM-01 220-240v AC - Square Digital Gauge or Time Totalizer

Yokins Hour Meter HM-01 220-240v AC - Square Digital Gauge or Time Totalizer

3.9
$ 36.00
HM DIGITAL FLM-3 Consumer Flow Meter With One Year Warranty Hydrometer

HM DIGITAL FLM-3 Consumer Flow Meter With One Year Warranty Hydrometer

$ 199.00
HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, 2% Readout Accuracy

HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, 2% Readout Accuracy

$ 42.68
HM DIGITAL SM-1EC In-Line Single EC Monitor With One Year Warranty Watermeter…

HM DIGITAL SM-1EC In-Line Single EC Monitor With One Year Warranty Watermeter…

$ 78.00
Konvio Neer pH Test Meter ± 0.1pH High Accuracy with 0.00-14.00ph Measure Range for Drinking Water, Hydroponics, Aquariums, Swimming Pools. (Manual pH Meter)

Konvio Neer pH Test Meter ± 0.1pH High Accuracy with 0.00-14.00ph Measure Range for Drinking Water, Hydroponics, Aquariums, Swimming Pools. (Manual pH Meter)

3.9
$ 46.00
HM Digital HM AP-2 AquaPro Water Quality Tester (EC Tester)

HM Digital HM AP-2 AquaPro Water Quality Tester (EC Tester)

3.9
$ 39.00