Pool sensors and probes

pH Tester, Pool pH Tester Measures TDS pH EC Temperature Water Quality pH Tester for Drinking Water, Pool, Aquarium, Beverages, Hydroponics

Drinking LCD Water Quality Meter Tester Digital Temperature PPM Water Purity Tester 0-9990 PPM for Measuring Water Hydroponics Aquarium Pool Spa (Does Not Test PH)

High Accuracy Water Quality Tester, Water Purity Tester with Aluminum Iron Bar TDS Electrolyzer Device, EU plug 220V

Water Quality Test Meter TDS PH EC Temperature 4 in 1 Set Digital Tester with LCD Display Test for Swimming Pool, Aquarium

LCD Screen TDS EC Meter Digital TDS Tester 3 in 1 for Water Quality Tester Pen EC, Conductivity and Temperature Water Quality Purity Measurement for Drinking Pool Lab

Digital LCD Water Quality Meter Tester Professional Measuring Pen Water Hardness Mineral Impurities Content in Water

Digital PH Meter with Litmus Test Strip Dual Check Function/Temperature, Pool pH Tester 0.01 High Accuracy with Innovative Color Changing LCD, ATC Function

2PCS Water Quality Tester, Electronic pH Meter Tester, TDS&EC Meter Temperature, 4 in 1 Water Quality Tester with LCD Display, High Accuracy Resolution 0.01, for Swimming Pool, Drinking Water NPTERBL

3 in 1 Digital Water Quality Tester, TDS, EC Meter and Temperature - TDS Meter for Drinking Water, Hydroponics, Pools, Aquariums

1Pcs Electronic PH Meter Tester TDS Meter Water Quality Tester TDS PH EC Temperature Measuring Range 0-9990 Ppm, Digital Tester with LCD Display Test for Swimming Pool, Aquarium

Digital Water Tester TDS Meter - Ppm Meter, and Temperature Test Pen 3-in-1 Water Quality Tester

Digital PH Meter TDS Meter Water Quality Tester LCD Screen Pen-type Tester With Two Keys For Drinking Water Pool Tank

Electronic PH Meter Tester, 0-14 pH Measuring Range, High Precision Pool pH Tester, pH Meter for Swimming Pool, Aquarium, Drinking Water

PH Meter, PH/TDS/EC/Temperature Conductivity Meter, High Accuracy Automatic Calibration, Digital for Pool Drinking Water Aquariums

[NEVER USED] Swimming Pool Salinity Tester, 5-in-1 Digital Seawater Salinity Tester, IP67 Waterproof Test Kit

Electronic pH meter, 5 in 1 pH tester for swimming pools with backlight, pH/TDS/EC/salinity/temperature with ATC, high precision pH meter with a resolution of 0.01, for drinking water, aquariums and s

Water Quality Tester Portable Digital Water Quality Tester Orp Tester Pen Water Quality Analyzer for Alcohol Pools Aquarium Water Quality Tester

7-in-1 pH meter with temperature, salinity, TDS, and EC high-precision, waterproof, automatic, multi-function tester ORP and negative potential measurements pH meter quality test pen

PH Meter, PH/TDS/EC/Temperature Conductivity Meter, High Accuracy Automatic Calibration, Digital for Pool Drinking Water Aquariums

Portable water quality meter/electrolyzer/water contamination monitor/testing device/electrolyzer

Electronic pH Meter, 5-in-1 Pool Water Tester with Backlight, pH/TDS/EC/Salinity/Temperature with ATC, High Precision pH Meter with 0.01 Resolution, for Drinking Water, Aquarium

Electronic 5-in-1 PH Meter Tester, Measures pH, TDS, EC Salinity and Temperature, Water Quality Tester, LCD Display and Reading Accuracy, for Drinking Water, Aquariums, Swimming Pools, etc.

Water Electrolyzer Electrolysis Test,Portable Water Quality Tester Lightweight Water Impurity Monitor Electrolyzer Test Monitor

Digital Water Quality Tester Pen Type High Accuracy Portable Waterproof Water PH Quality Meter

Digital Water PH Tester LCD Pen Water Quality Analyzer Pool Aquarium PH High Precision Portable

Electronic 8-in-1 Pool pH Meter: Multifunctional tester for pH/TDS/Salt/SG/ORP/EC/Temperature/H₂ - Accurate, waterproof and ready to use.

Portable Digital PH Chlorine Tester Water Quality Tester Water Tester Chlorine Meter Swimming Pool Spa Water Quality Monitor Checker

Digital Water Quality Tester – pH Meter and Chlorine Detector – Large Display – For Swimming Pools and Drinking Water – Battery-Free

2-in-1 Chlorine Tester, Portable pH Analyzer for Swimming Pool Water Quality, for Swimming Tap

Portable Residual Chlorine Tester, Water Quality Detection, Testing Tool for Swimming Pools and Spas

3-in-1 Digital Water Quality Tester, TDS, EC Meter and Temperature Meter - TDS Meter for Drinking Water, Hydroponics, Swimming Pools, Aquariums

pc portable water quality tester/electrolyzer/water impurity monitor/test meter/electrolyzer machine

4-in-1 pH Meter, Water Quality Tester for pH/TDS/EC/Temperature, IP67 Digital pH Meter with Auto Calibration and Backlit LCD for Hydroponics, Garden, Swimming Pool

Portable battery-powered water quality tester with large chlorine and pH display and probe for swimming pools and spas.

8-in-1 Electronic pH Meter for Swimming Pools, pH/TDS/SALT/SG/ORP/EC/TEMP/H2 Tester, Water Quality Tester for Swimming Pools, Spas, Aquariums, Drinking Water, and Hydroponics

pH Meter Tester, 4-in-1 Electronic Pool pH Tester, pH, TDS, EC and Temperature Meter, Water Quality Tester with LCD Screen and Accurate Readings, for Swimming Pools and Aquariums

pH acidity meter water quality detector pH tester value pen white TDS pen + yellow pH meter

PH Meter, PH Meter Tester 5-in-1 PH/TDS/EC/ORP/Temp Meter, Water Quality Monitoring Tester for Swimming Pools, Hydroponics, Drinking Water, Aquariums

[NEVER USED] Digital pH Meter Tester, 0.01 Resolution 0-14 pH, 4-in-1 TDS EC Temperature Meter, Water Quality Tester with Backlit LCD, Automatic Calibration, Drinking Water Pool Test-A

[NEVER USED] Pool Salinity Tester 5 in 1 Digital Salt Water pH and Salinity Meter Pool pH and Salinity Tester Salinity Meter for Swimming Pool, Hot Tub and Swim Spa

6-in-1 multi-function test strips for swimming pools: residual chlorine, pH, alkalinity, hardness (sold individually)

6-in-1 multi-function test strips for swimming pools: residual chlorine, pH, alkalinity, hardness (sold individually)

Battery-free TDS water quality detector (yellow)--BIEMMEDUE

[NEVER USED] Combo Digital PH and TDS Meter, 0.05 ph pH Tester with High Accuracy +/-2% Reading Accuracy TDS Tester, Water Quality Tester for Drinking Water/Pool/Aquarium/Swimming Pools (Brass

3 in 1 Water Quality Test Pen EC TEMP PH Water Quality Tester High Accuracy EC Water Tester Digital with Detection Powder

PC102 Swimming Pool Water Quality Tester with Hot Spring and Residual Chlorine Detector for Aquarium

Swimming pool water quality tester – Measures chlorine, TDS and pH value – Accurate and reliable--BIEMMEDUE

[NEVER USED] Swimming pool water tester pH and chlorine content, electronic 13 cm cable, spa chlorine test

[NEVER USED] Chlorine, pH and Chlorine Cl2 Tester – Water Level Monitoring for Pool, Spa – with Probe

Professional 3 in 1 Multi Parameter Water Quality Tester Portable Pen Type PH EC TEMP Meter Acidometer Water Quality Analysis Device

GROOFOO Salinity Meter Digital PenType Salinity Tester for Seawater Salt Water Swimming Pool

Automatic pH Tester, Chlorine pH Meter, Digital Water Analyzer, Specially for Swimming Pools, Spas, and Aquariums