Orp Meter(357)
Digital Water Tester, 7-in-1 FAC/TDS/Salt/EC/ORP/Temp/PH Meter for Saltwater Aquarium Sodium Swimming Pools Hot Tubs Spas, Rechargeable pH Meter with LCD Backlit & ATC $59.99

Digital Water Tester, 7-in-1 FAC/TDS/Salt/EC/ORP/Temp/PH Meter for Saltwater Aquarium Sodium Swimming Pools Hot Tubs Spas, Rechargeable pH Meter with LCD Backlit & ATC
Wiher Digital PH Meter, 7 in 1 Water Tester TDS Meter/Salinity Tester/Temp/pH Meter/EC/S.G/ORP Meter for Pool, Fish Tank, Drinking water, hydroponics, Black $19.99 Was $36.99

Wiher Digital PH Meter, 7 in 1 Water Tester TDS Meter/Salinity Tester/Temp/pH Meter/EC/S.G/ORP Meter for Pool, Fish Tank, Drinking water, hydroponics, Black
Wiher Pool Salt Tester, 8 in 1 Pool Salt Tester for Water PH / TDS / EC / SALT / TEMP/CL/S.G/ ORP Meter with ATC, for Household Drinking Water Pool Spas Fish Tank $39.99 Was $69.99

Wiher Pool Salt Tester, 8 in 1 Pool Salt Tester for Water PH / TDS / EC / SALT / TEMP/CL/S.G/ ORP Meter with ATC, for Household Drinking Water Pool Spas Fish Tank
10 in 1 Digital Water Tester Meter, PH/TDS/EC/Salinity/SG/ORP/Hydrogen-rich/Resistivity/Temp/Nutrient Solution, Water Tester Pen for Drinking Water Hydroponics Plant Fish Tank, Pool Salt Tester $29.99 Was $45.99

10 in 1 Digital Water Tester Meter, PH/TDS/EC/Salinity/SG/ORP/Hydrogen-rich/Resistivity/Temp/Nutrient Solution, Water Tester Pen for Drinking Water Hydroponics Plant Fish Tank, Pool Salt Tester
Black Friday Deal, PH Meter 8 in 1 Water Quality Tester Pen Meter, Digital PH Pen for TDS/EC/Salinity/Temp/ORP/S. G/PH/H2, Drinking Water Aquariums Hydroponic Cooking Tester Measure, Plants, Aquarium and Pool $24.59 Was $39.99

PH Meter 8 in 1 Water Quality Tester Pen Meter, Digital PH Pen for TDS/EC/Salinity/Temp/ORP/S. G/PH/H2, Drinking Water Aquariums Hydroponic Cooking Tester Measure, Plants, Aquarium and Pool
Aiper HydroComm Smart Water Quality Meter for 24/7 Monitoring of Pool Temperature, pH, ORP, EC, TDS $231.00 Was $297.00

Aiper HydroComm Smart Water Quality Meter for 24/7 Monitoring of Pool Temperature, pH, ORP, EC, TDS
Wiher Digital PH Meter, 7 in 1 Water Tester TDS Meter/Salinity Tester/Temp/pH Meter/EC/S.G/ORP Meter for Pool, Fish Tank, Drinking water, hydroponics, Black $19.99 Was $36.99

Wiher Digital PH Meter, 7 in 1 Water Tester TDS Meter/Salinity Tester/Temp/pH Meter/EC/S.G/ORP Meter for Pool, Fish Tank, Drinking water, hydroponics, Black
Professional Digital ORP Tester Pen Model ORP-969 High Stability Water Quality Meter Backlight Design with Plastic Storage Box and Calibration Screwdriver for Aquariums Pools Hydroponics 7.4x2.7 in $29.89 Was $33.84

Professional Digital ORP Tester Pen Model ORP-969 High Stability Water Quality Meter Backlight Design with Plastic Storage Box and Calibration Screwdriver for Aquariums Pools Hydroponics 7.4x2.7 in
OAZOUF 7 in 1 Digital Water Tester, PH/TDS/EC/SALT/SG/ORP/TEMP, Water Tester Pen for Drinking Water Hydroponics Plant Fish Tank, Pool Salt Tester $28.35

OAZOUF 7 in 1 Digital Water Tester, PH/TDS/EC/SALT/SG/ORP/TEMP, Water Tester Pen for Drinking Water Hydroponics Plant Fish Tank, Pool Salt Tester
7 In 1 Digital Water Quality Tester pH TDS EC Salinity ORP Temperature Specific Gravity Meter IP67 Waterproof LCD Test Pen For Drinking Water Pool Aquarium Hydroponics $25.88

7 In 1 Digital Water Quality Tester pH TDS EC Salinity ORP Temperature Specific Gravity Meter IP67 Waterproof LCD Test Pen For Drinking Water Pool Aquarium Hydroponics
Reduced price, 7 in 1 Digital PH/TDS/EC/ORP/TEMP/SG/Salinity Water Quality Tester Meter LCD Pen $30.23 Was $35.99

7 in 1 Digital PH/TDS/EC/ORP/TEMP/SG/Salinity Water Quality Tester Meter LCD Pen
10-in-1 Water Quality Tester, Digital Water Quality Meter with LCD, pH TDS EC SALT S.G. ORP H2 Fertility and Temperature Tester, 3-Point pH Calibration, Automatic Temperature Compensation $36.99 Was $41.99

10-in-1 Water Quality Tester, Digital Water Quality Meter with LCD, pH TDS EC SALT S.G. ORP H2 Fertility and Temperature Tester, 3-Point pH Calibration, Automatic Temperature Compensation
Yeswillos Professional ORP Meter Tester Redox 1999mV Range BNC Type Connector 1.2cm Dia $44.07

Yeswillos Professional ORP Meter Tester Redox 1999mV Range BNC Type Connector 1.2cm Dia
Fule pH Meter Calibration Solution ORP tester Accurate Reading for Plant Growth Test

Fule pH Meter Calibration Solution ORP tester Accurate Reading for Plant Growth Test
10 in 1 Digital Water Tester Meter, PH/TDS/EC/Salinity/SG/ORP/Hydrogen-rich/Resistivity/Temp/Nutrient Solution, Water Tester Pen for Drinking Water Hydroponics Plant Fish Tank, Pool Salt Tester $29.99 Was $45.99

10 in 1 Digital Water Tester Meter, PH/TDS/EC/Salinity/SG/ORP/Hydrogen-rich/Resistivity/Temp/Nutrient Solution, Water Tester Pen for Drinking Water Hydroponics Plant Fish Tank, Pool Salt Tester
Digital Chlorine ORP EC Temp PH Meter Bluetooth 6 in 1 Water Quality Tester $14.54

Digital Chlorine ORP EC Temp PH Meter Bluetooth 6 in 1 Water Quality Tester
Wiher Pool Salt Tester, 8 in 1 Pool Salt Tester for Water PH / TDS / EC / SALT / TEMP/CL/S.G/ ORP Meter with ATC, for Household Drinking Water Pool Spas Fish Tank $39.99 Was $69.99

Wiher Pool Salt Tester, 8 in 1 Pool Salt Tester for Water PH / TDS / EC / SALT / TEMP/CL/S.G/ ORP Meter with ATC, for Household Drinking Water Pool Spas Fish Tank
BIMZUC ORP H2 PH Temp Meter High Sensitivity Backlit LCD Display Hydrogen Water Tester for Pool Fish Tank Drinking Water $27.77

BIMZUC ORP H2 PH Temp Meter High Sensitivity Backlit LCD Display Hydrogen Water Tester for Pool Fish Tank Drinking Water
HM Digital Orp-200 Hm Digital Water Test Meter $129.99

HM Digital Orp-200 Hm Digital Water Test Meter
Hydrogen Water Tester 10 in 1 Resistivity/Fertility/H2/pH/TDS/EC/ORP/S.G/Salt/Temp Meter with ATC pH Meter,0.01 High Accuracy pH Tester Digital,TDS Meter PPM Meter for Drinking,Hydroponics,Pool. $44.99

Hydrogen Water Tester 10 in 1 Resistivity/Fertility/H2/pH/TDS/EC/ORP/S.G/Salt/Temp Meter with ATC pH Meter,0.01 High Accuracy pH Tester Digital,TDS Meter PPM Meter for Drinking,Hydroponics,Pool.
7 In 1 Digital Water Quality Tester pH TDS EC Salinity ORP Temperature Specific Gravity Meter IP67 Waterproof LCD Test Pen For Drinking Water Pool Aquarium Hydroponics $25.88

7 In 1 Digital Water Quality Tester pH TDS EC Salinity ORP Temperature Specific Gravity Meter IP67 Waterproof LCD Test Pen For Drinking Water Pool Aquarium Hydroponics
Black Friday Deal, PH Meter 8 in 1 Water Quality Tester Pen Meter, Digital PH Pen for TDS/EC/Salinity/Temp/ORP/S. G/PH/H2, Drinking Water Aquariums Hydroponic Cooking Tester Measure, Plants, Aquarium and Pool $24.59 Was $39.99

PH Meter 8 in 1 Water Quality Tester Pen Meter, Digital PH Pen for TDS/EC/Salinity/Temp/ORP/S. G/PH/H2, Drinking Water Aquariums Hydroponic Cooking Tester Measure, Plants, Aquarium and Pool
Portable Hydrogen Water Tester with Multi-function ORP Redox Meter - Ensures $28.58

Portable Hydrogen Water Tester with Multi-function ORP Redox Meter - Ensures
7 in 1 PH/Free Chlorine/ORP/EC/TDS/Salt/Temp PH Meter Swimming Pool Salinity Tester IP67 Waterproof for Aquarium $53.96

7 in 1 PH/Free Chlorine/ORP/EC/TDS/Salt/Temp PH Meter Swimming Pool Salinity Tester IP67 Waterproof for Aquarium
Digital ORP Meter Water Quality Tester Pen 0 to 1999mV High Accuracy Redox Potential Monitor with Backlit LCD Screen for Aquarium Hydroponics Swimming Pool and Spa Drinking Water Testing $33.66

Digital ORP Meter Water Quality Tester Pen 0 to 1999mV High Accuracy Redox Potential Monitor with Backlit LCD Screen for Aquarium Hydroponics Swimming Pool and Spa Drinking Water Testing
ORP/Redox Tester Waterproof ORP Meter Monitor Pen Water Quality Analyzer For Drinking Aquarium Swimming Pool $87.36

ORP/Redox Tester Waterproof ORP Meter Monitor Pen Water Quality Analyzer For Drinking Aquarium Swimming Pool
7 In 1 Water Quality Tester PH TDS EC ORP Redox Salinity S. G Temperature TEMP Meter C-600 For Drinking Water Aquariums PH Test ,Pocket Size Sensor $46.50

7 In 1 Water Quality Tester PH TDS EC ORP Redox Salinity S. G Temperature TEMP Meter C-600 For Drinking Water Aquariums PH Test ,Pocket Size Sensor
Suodoka 4-in-1 ORP H2 pH Temp Meter, High Sensitivity Backlit LCD Digital Water Quality Tester Pen for Swimming Pool, Fish Tank, Drinking Water (7.09 inches / 180 mm) $26.77

Suodoka 4-in-1 ORP H2 pH Temp Meter, High Sensitivity Backlit LCD Digital Water Quality Tester Pen for Swimming Pool, Fish Tank, Drinking Water (7.09 inches / 180 mm)
7 In 1 Temp ORP EC TDS Salinity S.G PH Meter Online Blue Tooth Water Quality Tester APP Control For Drinking Laboratory Aquarium ,Pocket Size Sensor $59.36

7 In 1 Temp ORP EC TDS Salinity S.G PH Meter Online Blue Tooth Water Quality Tester APP Control For Drinking Laboratory Aquarium ,Pocket Size Sensor
Tcwhniev Digital PH Meter 7 In 1 PH/ORP/EC/TEMP/SALT/S/G/TDS/Water Quality Tester High Precision Water Tester Pen for Household Drinking Water Swimming Pool Aquarium Hydroponics Plants $19.89

Tcwhniev Digital PH Meter 7 In 1 PH/ORP/EC/TEMP/SALT/S/G/TDS/Water Quality Tester High Precision Water Tester Pen for Household Drinking Water Swimming Pool Aquarium Hydroponics Plants
Digital PH Meter, 5 in 1 Pool Salt Tester for Water PH / TDS / EC / Salinity / Temp Meter with ATC, for Household Drinking Water Hot Tub Spas Fish Tank $23.99 Was $29.99

Digital PH Meter, 5 in 1 Pool Salt Tester for Water PH / TDS / EC / Salinity / Temp Meter with ATC, for Household Drinking Water Hot Tub Spas Fish Tank
5 in 1 Tester Pool Salt Tester & pH Meter with Temperature, Digital Meter and PH Tester for Water, PH/TDS/EC/Salinity/Temp Meter with ATC, for Household Drinking Water Hot Tub Spas Fish Tank $21.99

5 in 1 Tester Pool Salt Tester & pH Meter with Temperature, Digital Meter and PH Tester for Water, PH/TDS/EC/Salinity/Temp Meter with ATC, for Household Drinking Water Hot Tub Spas Fish Tank
ORP-169F Waterproof ORP Meter High Quality ORP Meter Water Quality Tester Test Tool ORP Tester $23.69

ORP-169F Waterproof ORP Meter High Quality ORP Meter Water Quality Tester Test Tool ORP Tester
Clearance, 5 In 1 Water Quality Tester Monitor PH EC TDS Temperature ORP Meter For Pools Drinking Water Aquariums Digital Quality Detector ,Pocket Size Sensor $44.21 Was $49.21

5 In 1 Water Quality Tester Monitor PH EC TDS Temperature ORP Meter For Pools Drinking Water Aquariums Digital Quality Detector ,Pocket Size Sensor
Reduced price, 7 in 1 Digital PH/TDS/EC/ORP/TEMP/SG/Salinity Water Quality Tester Meter LCD Pen $30.23 Was $35.99

7 in 1 Digital PH/TDS/EC/ORP/TEMP/SG/Salinity Water Quality Tester Meter LCD Pen
1 Pack 8 in 1 Water Quality Tester, WiFi Water Quality Meter with App Connection, Mount Monitor for Fish , Aquarium, Hydroponics, Measures PH/S.G/EC/Salt/ORP/TDS/CF/Temp $205.10

1 Pack 8 in 1 Water Quality Tester, WiFi Water Quality Meter with App Connection, Mount Monitor for Fish , Aquarium, Hydroponics, Measures PH/S.G/EC/Salt/ORP/TDS/CF/Temp
Chlorine & PH Meter, 5 in 1 Water Quality Tester for Chlorine/PH/ORP/H2/Temp, Digital pH and Chlorine Tester for Hot Tub Drinking Water Quality Analysis Monitor $26.99

Chlorine & PH Meter, 5 in 1 Water Quality Tester for Chlorine/PH/ORP/H2/Temp, Digital pH and Chlorine Tester for Hot Tub Drinking Water Quality Analysis Monitor
ORP Meter,Single Line ST10R $178.58

ORP Meter,Single Line ST10R
ORP-3569 Water Quality Tester pH ORP Temp Meter with Backlit Display $47.35

ORP-3569 Water Quality Tester pH ORP Temp Meter with Backlit Display
8-In-1 Water Quality Testing Pen Digital TDS EC ORP Salinity S.G H2 Meter Portable Waterproof Analyzer for Drinking Water Aquarium Pool Hydroponics

8-In-1 Water Quality Testing Pen Digital TDS EC ORP Salinity S.G H2 Meter Portable Waterproof Analyzer for Drinking Water Aquarium Pool Hydroponics
Milwaukee Instruments pH/ORP/Temp Meter, Dual Level Tester Electrode PH58, 0.1 pH, 250 Hrs Battery $219.65

Milwaukee Instruments pH/ORP/Temp Meter, Dual Level Tester Electrode PH58, 0.1 pH, 250 Hrs Battery
Tuya Smart PH Meter Data Logger Temp TDS Salinity ORP Water Tester Monitor Analyzer For Aquariums Pool Hydroponics ,Accurate - BLACK_PLUG $138.23

Tuya Smart PH Meter Data Logger Temp TDS Salinity ORP Water Tester Monitor Analyzer For Aquariums Pool Hydroponics ,Accurate - BLACK_PLUG
Large Display ORP Pen $114.50

Large Display ORP Pen
Milwaukee MW105 MAX Waterproof pH/ORP/Temp Logging Portable Meter for Brewers $448.50

Milwaukee MW105 MAX Waterproof pH/ORP/Temp Logging Portable Meter for Brewers
Multi-Parameter PH Meter Water Quality Acidity TEMP ORP Tester Redox Analyzer Monitor Big Screen $76.21

Multi-Parameter PH Meter Water Quality Acidity TEMP ORP Tester Redox Analyzer Monitor Big Screen
Digital ORP PH TDS Meter Temperature Tester Waterproof With Automatic Calibration Portable Tester COM-80/100/200/300/360 ,Multifunctional $96.15

Digital ORP PH TDS Meter Temperature Tester Waterproof With Automatic Calibration Portable Tester COM-80/100/200/300/360 ,Multifunctional
3 In 1 Digital Tester Reads ORP Chlorine and Temp for Swimming Pool Water ,Liquid Test $46.74

3 In 1 Digital Tester Reads ORP Chlorine and Temp for Swimming Pool Water ,Liquid Test
Hydrogen Water Quality Tester H2 Monitor, TEMP & ORP Meter 0-2400PPb for Drinking Water, Aquariums, Spa $22.49

Hydrogen Water Quality Tester H2 Monitor, TEMP & ORP Meter 0-2400PPb for Drinking Water, Aquariums, Spa
7 In 1 Multifunctional PH TDS EC ORP Salinity SG Temp Meter Pen Type IP67 ATC For Hydroponics, Aquarium $21.58

7 In 1 Multifunctional PH TDS EC ORP Salinity SG Temp Meter Pen Type IP67 ATC For Hydroponics, Aquarium
Plant Water Meter, pH Meter, 7 in 1 Digital Water Tester for pH TDS EC SALT ORP TEMP Fertility, TDS Meter for Hydroponics, Aquarium, Swimming Pool, Hot Tub $39.59 Was $43.99

Plant Water Meter, pH Meter, 7 in 1 Digital Water Tester for pH TDS EC SALT ORP TEMP Fertility, TDS Meter for Hydroponics, Aquarium, Swimming Pool, Hot Tub
FAQ
How does an ORP meter help with pool care?
An ORP meter, or Oxidation Reduction Potential meter, helps you monitor water quality by measuring how well your pool is disinfected. It gives a quick reading on the effectiveness of sanitizers like chlorine. Keeping an eye on ORP levels means you can adjust chemicals sooner for safer, cleaner water.
- ORP readings make maintenance easier.
- Helps reduce guesswork when adding pool chemicals.
- Works alongside other testers for a complete water check.
Can I use a water tester for aquariums?
Many digital water testers, including ORP meters, are suitable for aquarium use. They check key parameters like pH, TDS, EC, and ORP so you can track water quality and support aquatic life.
- Helps maintain balanced water for fish and plants.
- Easy to use in tanks of all sizes.
- Multi-function testers can be used for pools, spas, and home water, too.
What should I look for in a digital water tester?
Choosing a digital water tester is about matching features to your needs. Look for meters that measure several parameters like pH, TDS, EC, and ORP. Multi-function testers are efficient if you handle pools, aquariums, and drinking water.
- Consider models with automatic temperature compensation for accurate readings.
- Waterproof designs add durability.
- LCD screens make results easy to read.
How do I calibrate my ORP meter?
Calibrating your ORP meter can improve its performance and reading accuracy.
- Follow the manufacturer's instructions for the specific calibration steps.
- Use the recommended calibration solution.
- Rinse the probe with distilled water after use.
Is it easy to care for a water quality tester?
Caring for your water quality tester is pretty straightforward.
- Always rinse the probe gently with distilled water after each test.
- Store it in a dry, protective case when not in use.
- Keep batteries fresh to prevent interruptions during use.
Popular in ORP Meter Industrial Water Quality Testers Online
Related Products
Food Salinity Tester Pen Type Salinity Meter Salt Concentration Meter Salinometer LED Indicator Screen for Home Kitchen
Food Salinity Tester Pen Type Salinity Meter Salt Concentration Meter Salinometer LED Indicator Screen for Home Kitchen$12.00current price $12.00AC Infinity pH Meter PRO Kit, High Precision Digital pH Pen with ±0.01 pH Accuracy and Interchangeable Probe, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools
AC Infinity pH Meter PRO Kit, High Precision Digital pH Pen with ±0.01 pH Accuracy and Interchangeable Probe, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools$79.99current price $79.99Water Quality Tester, 3 in 1 TDS Meter, EC Meter & Temperature Meter, 0-9990ppm Measurement Range, Digital Water Tester for Drinking Water, Aquariums, Farming, Pools
Water Quality Tester, 3 in 1 TDS Meter, EC Meter & Temperature Meter, 0-9990ppm Measurement Range, Digital Water Tester for Drinking Water, Aquariums, Farming, Pools$10.00current price $10.00HM Digital TDS-EZ TDS Meter Digital Water Tester, Water Quality Tester, 0-9990 ppm, Blue
HM Digital TDS-EZ TDS Meter Digital Water Tester, Water Quality Tester, 0-9990 ppm, Blue$16.95current price $16.95Digital Food PH Tester, 0.01 Resolution High Accuracy Digital PH Meter with Backlit LCD Display, Digital pH Tester for Sourdough, Bread, Meat, Canning, Cheese, Solid Samples, Soft Soil, Water
Digital Food PH Tester, 0.01 Resolution High Accuracy Digital PH Meter with Backlit LCD Display, Digital pH Tester for Sourdough, Bread, Meat, Canning, Cheese, Solid Samples, Soft Soil, Water$31.99current price $31.99OBOSOE Digital pH Meter,Water Quality Tester,Water pH Tester With 0-14pH Measurement Range,Suitable For Drinking Water,Hydroponics, Aquarium,Swimming Pool. High Precision 0.01pH Pen Tester
OBOSOE Digital pH Meter,Water Quality Tester,Water pH Tester With 0-14pH Measurement Range,Suitable For Drinking Water,Hydroponics, Aquarium,Swimming Pool. High Precision 0.01pH Pen Tester$9.97current price $9.97water tester,tds meter,zero water tester,0-9990 ppm Digital Water Quality Tester Auto Calibration Easy to Use and Portable,,Professional Testing for Drinking Water,Dark Blue
water tester,tds meter,zero water tester,0-9990 ppm Digital Water Quality Tester Auto Calibration Easy to Use and Portable,,Professional Testing for Drinking Water,Dark Blue$1.95current price $1.95iSpring 3-Button Digital TDS Water Quality Test Meter Kit with Temperature Calibration, 0.11 lb
iSpring 3-Button Digital TDS Water Quality Test Meter Kit with Temperature Calibration, 0.11 lb$15.99current price $15.99Apera Instruments AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy
Apera Instruments AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy$85.04current price $85.04Digital PH Meter with ATC, High Accuracy Digital Water Quality Tester with 0-14 PH Measurement Range for Household Drinking, Hydroponics, Pool and Aquarium
Digital PH Meter with ATC, High Accuracy Digital Water Quality Tester with 0-14 PH Measurement Range for Household Drinking, Hydroponics, Pool and Aquarium$14.99current price $14.99TDS Meter Digital Water Tester, Accurate Professional 4-in-1 TDS, Temperature and EC Meter, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums,Water Tester for Drinking Water
TDS Meter Digital Water Tester, Accurate Professional 4-in-1 TDS, Temperature and EC Meter, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums,Water Tester for Drinking Water$11.59current price $11.593 in 1 Digital PH Meter for Water, TDS/PH/Temp Meter, Water Tester for Drinking Water, Swimming Pool, Hydroponics
3 in 1 Digital PH Meter for Water, TDS/PH/Temp Meter, Water Tester for Drinking Water, Swimming Pool, Hydroponics$17.66current price $17.66pH Meter for Water 4 in 1 pH Temp EC TDS Meter for Hydroponics PPM and Water Tester Digital pH Meter for Nutrients Growing Hydroponics Gardening Laboratory Household Drinking
pH Meter for Water 4 in 1 pH Temp EC TDS Meter for Hydroponics PPM and Water Tester Digital pH Meter for Nutrients Growing Hydroponics Gardening Laboratory Household Drinking$18.99current price $18.99AC Infinity pH Meter Kit, High Precision Digital pH Pen with ±0.1 pH Accuracy, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools
AC Infinity pH Meter Kit, High Precision Digital pH Pen with ±0.1 pH Accuracy, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools$69.99current price $69.99Blue Digital Ph Meter Pen Type Water Quality Tester Kit With Leather Cover Blue For Home Use #M7S37
Blue Digital Ph Meter Pen Type Water Quality Tester Kit With Leather Cover Blue For Home Use #M7S37$7.59current price $7.597 in 1 Digital PH/TDS/EC/ORP/TEMP/SG/Salinity Water Quality Tester Meter LCD Pen
7 in 1 Digital PH/TDS/EC/ORP/TEMP/SG/Salinity Water Quality Tester Meter LCD Pen$30.23current price $30.23