Pool sensors and probes

Electronic pH Tester, 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, Spas (1/4)

Electronic pH Tester, 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, Spas

~~£39.99~~

Free shipping

C-100 Multifunctional 5-in-1 Salinity TDS EC Seawater Test Pen Water Quality Tester Detector (1/5)

C-100 Multifunctional 5-in-1 Salinity TDS EC Seawater Test Pen Water Quality Tester Detector (2/5)

C-100 Multifunctional 5-in-1 Salinity TDS EC Seawater Test Pen Water Quality Tester Detector (3/5)

C-100 Multifunctional 5-in-1 Salinity TDS EC Seawater Test Pen Water Quality Tester Detector

~~£39.99~~

Free shipping

Digital pH/TDS/EC/temperature quality tester, analyzer for water, swimming pools, aquariums (1/5)

Digital pH/TDS/EC/temperature quality tester, analyzer for water, swimming pools, aquariums (2/5)

Digital pH/TDS/EC/temperature quality tester, analyzer for water, swimming pools, aquariums (3/5)

Digital pH/TDS/EC/temperature quality tester, analyzer for water, swimming pools, aquariums

~~£39.99~~

Free shipping

3-in-1 High-Precision Water Quality Test Pen: TDS/PH/Temp 0-14 pH Measurement Range for Swimming Pools (1/5)

3-in-1 High-Precision Water Quality Test Pen: TDS/PH/Temp 0-14 pH Measurement Range for Swimming Pools (2/5)

3-in-1 High-Precision Water Quality Test Pen: TDS/PH/Temp 0-14 pH Measurement Range for Swimming Pools (3/5)

3-in-1 High-Precision Water Quality Test Pen: TDS/PH/Temp 0-14 pH Measurement Range for Swimming Pools

~~£39.99~~

Free shipping

2-in-1 Chlorine pH Meter Tester PC-102 Chlorine pH Cl2 Tester Swimming Pool Water Quality Testing Device, New Swimming Pool Water Quality Tester (1/4)

2-in-1 Chlorine pH Meter Tester PC-102 Chlorine pH Cl2 Tester Swimming Pool Water Quality Testing Device, New Swimming Pool Water Quality Tester (2/4)

2-in-1 Chlorine pH Meter Tester PC-102 Chlorine pH Cl2 Tester Swimming Pool Water Quality Testing Device, New Swimming Pool Water Quality Tester

~~£39.99~~

Free shipping

Portable Digital Chlorine pH Tester, Water Quality Tester, Water Meter, Chlorine Meter for Swimming Pools and Spas, Water Quality Monitor, Checker (1/5)

Portable Digital Chlorine pH Tester, Water Quality Tester, Water Meter, Chlorine Meter for Swimming Pools and Spas, Water Quality Monitor, Checker

~~£39.99~~

Free shipping

5-in-1 Electronic pH Meter Tester, Measures pH, TDS, EC, Salinity & Temperature, Water Quality Tester, LCD Screen and Reading Accuracy, for Drinking Water, Aquariums, Swimming Pools etc. (1/5)

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

~~£38.99~~

Free shipping

Multifunctional water quality meter measures TDS, electrical conductivity and temperature – three in one device with backlight.--BIEMMEDUE (1/3)

Multifunctional water quality meter measures TDS, electrical conductivity and temperature – three in one device with backlight.--BIEMMEDUE

~~£41.12~~

Free shipping

ORP redox tester for aquariums, pools and water treatment – 1-point calibration, measuring range -1000 to +1000 mV, precise LCD display (1/5)

ORP redox tester for aquariums, pools and water treatment – 1-point calibration, measuring range -1000 to +1000 mV, precise LCD display (2/5)

ORP redox tester for aquariums, pools and water treatment – 1-point calibration, measuring range -1000 to +1000 mV, precise LCD display (3/5)

ORP redox tester for aquariums, pools and water treatment – 1-point calibration, measuring range -1000 to +1000 mV, precise LCD display

~~£41.19~~

Electronic pH Meter Tester: Measures pH & EC, Salinity & Temperature Water Quality Tester LCD Screen and Accurate Readings (1/4)

Electronic pH Meter Tester: Measures pH & EC, Salinity & Temperature Water Quality Tester LCD Screen and Accurate Readings (2/4)

Electronic pH Meter Tester: Measures pH & EC, Salinity & Temperature Water Quality Tester LCD Screen and Accurate Readings

Water Quality Tester, Water Quality Tester, PH Automatic Residual Chlorine Tester PH Water Tester Chlorine Analysis Swimming Pool Test Kit (1/5)

Water Quality Tester, Water Quality Tester, PH Automatic Residual Chlorine Tester PH Water Tester Chlorine Analysis Swimming Pool Test Kit (2/5)

Water Quality Tester, Water Quality Tester, PH Automatic Residual Chlorine Tester PH Water Tester Chlorine Analysis Swimming Pool Test Kit (3/5)

Water Quality Tester, Water Quality Tester, PH Automatic Residual Chlorine Tester PH Water Tester Chlorine Analysis Swimming Pool Test Kit

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Hydrometer and pH meter, numeric salt meters and PH. 5 salt readings in pH, Temp, and TDS. (1/4)

Hydrometer and pH meter, numeric salt meters and PH. 5 salt readings in pH, Temp, and TDS. (2/4)

Hydrometer and pH meter, numeric salt meters and PH. 5 salt readings in pH, Temp, and TDS.

Free shipping

Electronic Chlorine and pH Tester for Swimming Pools - Water Quality Meter (1/5)

Electronic Chlorine and pH Tester for Swimming Pools - Water Quality Meter (2/5)

Electronic Chlorine and pH Tester for Swimming Pools - Water Quality Meter (3/5)

Electronic Chlorine and pH Tester for Swimming Pools - Water Quality Meter

Free shipping

in 1 Electronic pH Meter Tester, pH Meter with Backlit LCD Screen, Water Quality Tester for Testing pH/TDS/EC/Temperature/Salinity, for Drinking Water/Aquariums/Pools (1/5)

in 1 Electronic pH Meter Tester, pH Meter with Backlit LCD Screen, Water Quality Tester for Testing pH/TDS/EC/Temperature/Salinity, for Drinking Water/Aquariums/Pools

Free shipping

in 1 Electronic PH Meter with TDS EC Salinity Temperature, High Accuracy IP67 Waterproof Multi-parameter pH Tester, Pool Water Salinity pH Tester with Automatic Temp Compensation (1/5)

in 1 Electronic PH Meter with TDS EC Salinity Temperature, High Accuracy IP67 Waterproof Multi-parameter pH Tester, Pool Water Salinity pH Tester with Automatic Temp Compensation

Free shipping

Electronic pool tester – pH and chlorine, 13cm cable, high accuracy, waterproof, clear LCD display (1/4)

Electronic pool tester – pH and chlorine, 13cm cable, high accuracy, waterproof, clear LCD display (2/4)

Electronic pool tester – pH and chlorine, 13cm cable, high accuracy, waterproof, clear LCD display

~~£48.76~~

PH Meter Water Digital Tester: 5 in 1 PH EC TDS Salinity Temperature High Precision Digital Pool Tester - Automatic Temperature Compensation Value Meter with LCD Display for Drinking Water (1/5)

PH Meter Water Digital Tester: 5 in 1 PH EC TDS Salinity Temperature High Precision Digital Pool Tester - Automatic Temperature Compensation Value Meter with LCD Display for Drinking Water

Free shipping

Chlorine and pH Water Meter Tester Kit, Portable Digital Water Quality Monitor, Electronic Water Quality Analyzer Test Kit for Swimming Pools and Spas (1/4)

Chlorine and pH Water Meter Tester Kit, Portable Digital Water Quality Monitor, Electronic Water Quality Analyzer Test Kit for Swimming Pools and Spas

Free shipping

Battery-free TDS water quality detector, white ---BIEMMEDUE

~~£39.37~~

Free shipping

[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 (1/4)

[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

5-in-1 Pool and Spa Tester: pH, salinity, temperature, ORP and TDS – precise, waterproof, with backlit LCD display (1/3)

5-in-1 Pool and Spa Tester: pH, salinity, temperature, ORP and TDS – precise, waterproof, with backlit LCD display

~~£46.59~~

High-Precision 7-in-1 Digital Tester for pH, TDS, EC, Salinity, Temperature, ORP, Density, Aquarium, Swimming Pool, and Plant Water (1/4)

High-Precision 7-in-1 Digital Tester for pH, TDS, EC, Salinity, Temperature, ORP, Density, Aquarium, Swimming Pool, and Plant Water (2/4)

High-Precision 7-in-1 Digital Tester for pH, TDS, EC, Salinity, Temperature, ORP, Density, Aquarium, Swimming Pool, and Plant Water

Compatible with the HM Digital AP-2 professional water quality tester (EC/TEMP µS and C°) (1/4)

Compatible with the HM Digital AP-2 professional water quality tester (EC/TEMP µS and C°) (2/4)

Compatible with the HM Digital AP-2 professional water quality tester (EC/TEMP µS and C°)

~~£51.97~~

Free shipping

Battery-free blue TDS water quality tester – precise and reliable for regular water monitoring--BIEMMEDUE (1/5)

Battery-free blue TDS water quality tester – precise and reliable for regular water monitoring--BIEMMEDUE (2/5)

Battery-free blue TDS water quality tester – precise and reliable for regular water monitoring--BIEMMEDUE (3/5)

Battery-free blue TDS water quality tester – precise and reliable for regular water monitoring--BIEMMEDUE

~~£39.33~~

Free shipping

3-in-1 Blue Electrical Conductivity Meter, TDS-EC Measuring Pen for Water Quality Analysis ---BIEMMEDUE (1/3)

3-in-1 Blue Electrical Conductivity Meter, TDS-EC Measuring Pen for Water Quality Analysis ---BIEMMEDUE

~~£39.86~~

Free shipping

4-in-1 pH Meter, Water Quality Tester, Ph/EC/TDS/Temperature, IP55 Meter, Auto Shut-Off, Waterproof, Backlit Display, Tester, White, Ph-686 (1/5)

4-in-1 pH Meter, Water Quality Tester, Ph/EC/TDS/Temperature, IP55 Meter, Auto Shut-Off, Waterproof, Backlit Display, Tester, White, Ph-686 (2/5)

4-in-1 pH Meter, Water Quality Tester, Ph/EC/TDS/Temperature, IP55 Meter, Auto Shut-Off, Waterproof, Backlit Display, Tester, White, Ph-686 (3/5)

4-in-1 pH Meter, Water Quality Tester, Ph/EC/TDS/Temperature, IP55 Meter, Auto Shut-Off, Waterproof, Backlit Display, Tester, White, Ph-686

Free shipping

3-in-1 Blue Electrical Conductivity Meter, TDS-EC Measuring Pen for Water Quality Analysis with Backlight ---BIEMMEDUE (1/3)

3-in-1 Blue Electrical Conductivity Meter, TDS-EC Measuring Pen for Water Quality Analysis with Backlight ---BIEMMEDUE

~~£40.45~~

Free shipping

PC101 PH & CL2 Test 2 in 1 Electronic SPA Digital Water Quality Tester Residual Chlorine Analysis Detector Monitor (1/5)

PC101 PH & CL2 Test 2 in 1 Electronic SPA Digital Water Quality Tester Residual Chlorine Analysis Detector Monitor (2/5)

PC101 PH & CL2 Test 2 in 1 Electronic SPA Digital Water Quality Tester Residual Chlorine Analysis Detector Monitor (3/5)

PC101 PH & CL2 Test 2 in 1 Electronic SPA Digital Water Quality Tester Residual Chlorine Analysis Detector Monitor

~~£62.08~~

Free shipping

in 1 Electronic PH Meter for Swimming Pools, PH/TDS/SALT/SG/ORP/EC/TEMP/H2 Tester, Water Quality Tester for Swimming Pool, Spa, Aquarium, Drinking Water, Hydroponics (1/5)

in 1 Electronic PH Meter for Swimming Pools, PH/TDS/SALT/SG/ORP/EC/TEMP/H2 Tester, Water Quality Tester for Swimming Pool, Spa, Aquarium, Drinking Water, Hydroponics

~~£62.08~~

Free shipping

Electronic PH Meter Tester, PH Meter with Backlit LCD Display, Water Quality Tester for Testing pH/TDS/EC/Temperature/Salinity (1/5)

Electronic PH Meter Tester, PH Meter with Backlit LCD Display, Water Quality Tester for Testing pH/TDS/EC/Temperature/Salinity (2/5)

Electronic PH Meter Tester, PH Meter with Backlit LCD Display, Water Quality Tester for Testing pH/TDS/EC/Temperature/Salinity (3/5)

Electronic PH Meter Tester, PH Meter with Backlit LCD Display, Water Quality Tester for Testing pH/TDS/EC/Temperature/Salinity

~~£62.08~~

Free shipping

[NEVER USED] PH Meter Tester, 4-in-1 Electronic Swimming Pool PH Tester, PH TDS EC and Temperature Meter, Water Quality Tester with LCD Display and Reading Accuracy, for Swimming Pool, Aquarium (1/4)

[NEVER USED] PH Meter Tester, 4-in-1 Electronic Swimming Pool PH Tester, PH TDS EC and Temperature Meter, Water Quality Tester with LCD Display and Reading Accuracy, for Swimming Pool, Aquarium

New 3-in-1 water quality analyzer (TDS, EC, conductivity) with temperature compensation and backlight--BIEMMEDUE (1/3)

New 3-in-1 water quality analyzer (TDS, EC, conductivity) with temperature compensation and backlight--BIEMMEDUE

~~£41.59~~

Free shipping

Professional 3-in-1 digital water quality tester pH EC, temperature tester ideal for home, drinking water, aquarium, swimming pools and hydroponics. (1/4)

Professional 3-in-1 digital water quality tester pH EC, temperature tester ideal for home, drinking water, aquarium, swimming pools and hydroponics.

~~£41.99~~

Free shipping

Multifunctional Tester, LCD Screen SG Tester, Digital Temperature Meter, EC Tester, Salt Tester with White Backlight for Drinking Water, Aquarium, Swimming Pool (1/5)

Multifunctional Tester, LCD Screen SG Tester, Digital Temperature Meter, EC Tester, Salt Tester with White Backlight for Drinking Water, Aquarium, Swimming Pool

~~£40.99~~

Free shipping

3-in-1 Digital pH, EC, and Temperature Meter 001 High-Precision pH Water Quality Tester for Household Drinking Water, Swimming Pools, and Aquariums (1/5)

3-in-1 Digital pH, EC, and Temperature Meter 001 High-Precision pH Water Quality Tester for Household Drinking Water, Swimming Pools, and Aquariums

~~£40.99~~

Free shipping

ORP-969 ORP Tester, Portable Water Quality Analyzer for System (1/5)

ORP-969 ORP Tester, Portable Water Quality Analyzer for System (2/5)

ORP-969 ORP Tester, Portable Water Quality Analyzer for System (3/5)

ORP-969 ORP Tester, Portable Water Quality Analyzer for System

~~£40.99~~

Free shipping

Aquarium Pool Tester, 2-in-1 Digital ORP/TEMP Hydroponic Aquarium Pool Monitor (1/5)

Aquarium Pool Tester, 2-in-1 Digital ORP/TEMP Hydroponic Aquarium Pool Monitor (2/5)

Aquarium Pool Tester, 2-in-1 Digital ORP/TEMP Hydroponic Aquarium Pool Monitor (3/5)

Aquarium Pool Tester, 2-in-1 Digital ORP/TEMP Hydroponic Aquarium Pool Monitor

~~£41.99~~

Free shipping

Water quality meter, pH tester, robust ABS material, LCD display for accurate measurement, widely applicable in agriculture, industry, and medicine. (1/5)

Water quality meter, pH tester, robust ABS material, LCD display for accurate measurement, widely applicable in agriculture, industry, and medicine.

~~£40.99~~

Free shipping

Portable water quality analyzer, water electrolyzer, TDS tester, measuring device for water analysis--BIEMMEDUE

~~£41.74~~

Free shipping

Prorbtordorr orf egivtherectrólisis orf torgutor, mornorrtorr Trtorgbtorr lightweight forr evbandutorr the Qubanditand orf the torgutor egivtherectrorliztorthe. (1/4)

Prorbtordorr orf egivtherectrólisis orf torgutor, mornorrtorr Trtorgbtorr lightweight forr evbandutorr the Qubanditand orf the torgutor egivtherectrorliztorthe.

~~£22.07~~

Free shipping

4-in-1 Electronic pH Meter for Swimming Pools, pH, TDS, and Temperature, with LCD Screen, for Drinking Water, Aquariums, Hydroponics, and Swimming Pools (1/4)

4-in-1 Electronic pH Meter for Swimming Pools, pH, TDS, and Temperature, with LCD Screen, for Drinking Water, Aquariums, Hydroponics, and Swimming Pools

~~£54.57~~

Free shipping

Electronic pH Meter Tester, Measuring Range from 0 to 14 pH, High-Precision Swimming Pool pH Tester, pH Meter for Swimming Pools, Aquariums, and Drinking Water (1/5)

Electronic pH Meter Tester, Measuring Range from 0 to 14 pH, High-Precision Swimming Pool pH Tester, pH Meter for Swimming Pools, Aquariums, and Drinking Water

~~£51.51~~

ORP-986 Portable Pen Type ORP Meter Water Quality Tester Analyzer Experiment Detection Monitor 6.9 x 1.3 x 0.7 inch Used in Industry and Experiment (Blue Backlight), pH, Conductivity and Tds (1/5)

ORP-986 Portable Pen Type ORP Meter Water Quality Tester Analyzer Experiment Detection Monitor 6.9 x 1.3 x 0.7 inch Used in Industry and Experiment (Blue Backlight), pH, Conductivity and Tds

~~£71.86~~

Free shipping

PC102 Pool Water Quality Analyzer CL2 and pH, Portable Residual Chlorine Meter for Swimming Pools

~~£27.75~~

Free shipping

3-in-1 TDS pen for pets, EC conductivity analyzer, home water quality tester, high-precision digital display--BIEMMEDUE (1/4)

3-in-1 TDS pen for pets, EC conductivity analyzer, home water quality tester, high-precision digital display--BIEMMEDUE (2/4)

3-in-1 TDS pen for pets, EC conductivity analyzer, home water quality tester, high-precision digital display--BIEMMEDUE

~~£39.26~~

Free shipping

[NEVER USED] Electronic pH Meter, 5-in-1 Pool Water Tester with Backlight, pH/TDS/EC/Salinity/Temperature with ATC, High Precision pH Meter (1/4)

[NEVER USED] Electronic pH Meter, 5-in-1 Pool Water Tester with Backlight, pH/TDS/EC/Salinity/Temperature with ATC, High Precision pH Meter (2/4)

[NEVER USED] Electronic pH Meter, 5-in-1 Pool Water Tester with Backlight, pH/TDS/EC/Salinity/Temperature with ATC, High Precision pH Meter

[NEVER USED] 5-in-1 High-Precision Salinity Tester for Saltwater, IP67 Waterproof Test Kit (1/4)

[NEVER USED] 5-in-1 High-Precision Salinity Tester for Saltwater, IP67 Waterproof Test Kit (2/4)

[NEVER USED] 5-in-1 High-Precision Salinity Tester for Saltwater, IP67 Waterproof Test Kit

Electronic pH Meter, 5-in-1 Pool Water Tester with Backlight, pH/TDS/EC/Salinity/Temperature with ATC, High Precision pH Meter (1/4)

Electronic pH Meter, 5-in-1 Pool Water Tester with Backlight, pH/TDS/EC/Salinity/Temperature with ATC, High Precision pH Meter (2/4)

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

[NEVER USED] Swimming Pool Salinity Tester, 5-in-1 Digital Seawater Salinity Tester, IP67 Waterproof Test Kit (1/4)

[NEVER USED] Swimming Pool Salinity Tester, 5-in-1 Digital Seawater Salinity Tester, IP67 Waterproof Test Kit (2/4)

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

Digital Pool Water Quality Meter, Electronic pH Meter, pH Tester with LCD Screen, pH Test for Swimming Pools and Spas, Measuring Range from 0 to 14 pH (1/5)

Digital Pool Water Quality Meter, Electronic pH Meter, pH Tester with LCD Screen, pH Test for Swimming Pools and Spas, Measuring Range from 0 to 14 pH

~~£40.65~~

Testeur PH Mètre, Testeur PH Piscine Électronique 3-en-1, TDS Mètre Température, Testeur de qualité de l'eau avec Écran LCD et Précision de Lecture, pour Piscine, Aquarium (1/5)

Testeur PH Mètre, Testeur PH Piscine Électronique 3-en-1, TDS Mètre Température, Testeur de qualité de l'eau avec Écran LCD et Précision de Lecture, pour Piscine, Aquarium

Free shipping

4 in 1 EC TDS Salinity Temperature Test Pen Digital Water Quality Tester for Seawater Aquarium(Battery Not Included) (1/5)

4 in 1 EC TDS Salinity Temperature Test Pen Digital Water Quality Tester for Seawater Aquarium(Battery Not Included) (2/5)

4 in 1 EC TDS Salinity Temperature Test Pen Digital Water Quality Tester for Seawater Aquarium(Battery Not Included) (3/5)

4 in 1 EC TDS Salinity Temperature Test Pen Digital Water Quality Tester for Seawater Aquarium(Battery Not Included)

~~£75.22~~

Free shipping

PH & CL2 Test 2 in 1 Electronic SPA Digital Water Quality Tester Residual Chlorine Analysis Detector Monitor (1/5)

PH & CL2 Test 2 in 1 Electronic SPA Digital Water Quality Tester Residual Chlorine Analysis Detector Monitor (2/5)

PH & CL2 Test 2 in 1 Electronic SPA Digital Water Quality Tester Residual Chlorine Analysis Detector Monitor (3/5)

PH & CL2 Test 2 in 1 Electronic SPA Digital Water Quality Tester Residual Chlorine Analysis Detector Monitor

~~£64.38~~

Free shipping

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

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

~~£64.38~~

Free shipping