Pool sensors and probes

500+ products

Digital PH Meter TDS Meter Water Quality Tester LCD Screen Pen-type Tester With Two Keys For Drinking Water Pool Tank (1/5)

Digital PH Meter TDS Meter Water Quality Tester LCD Screen Pen-type Tester With Two Keys For Drinking Water Pool Tank (2/5)

Digital PH Meter TDS Meter Water Quality Tester LCD Screen Pen-type Tester With Two Keys For Drinking Water Pool Tank (3/5)

Digital PH Meter TDS Meter Water Quality Tester LCD Screen Pen-type Tester With Two Keys For Drinking Water Pool Tank (4/5)

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

~~£16.99~~

Free shipping

Digital LCD Water Quality Meter Tester Professional Measuring Pen Water Hardness Mineral Impurities Content in Water (1/5)

Digital LCD Water Quality Meter Tester Professional Measuring Pen Water Hardness Mineral Impurities Content in Water (2/5)

Digital LCD Water Quality Meter Tester Professional Measuring Pen Water Hardness Mineral Impurities Content in Water (3/5)

Digital LCD Water Quality Meter Tester Professional Measuring Pen Water Hardness Mineral Impurities Content in Water (4/5)

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

~~£16.99~~

Free shipping

High Accuracy Water Quality Tester, Water Purity Tester with Aluminum Iron Bar TDS Electrolyzer Device, EU plug 220V (1/5)

High Accuracy Water Quality Tester, Water Purity Tester with Aluminum Iron Bar TDS Electrolyzer Device, EU plug 220V (2/5)

High Accuracy Water Quality Tester, Water Purity Tester with Aluminum Iron Bar TDS Electrolyzer Device, EU plug 220V (3/5)

High Accuracy Water Quality Tester, Water Purity Tester with Aluminum Iron Bar TDS Electrolyzer Device, EU plug 220V (4/5)

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

~~£16.99~~

Free shipping

in 1 Digital Multifunctional Tester TDS EC and Temperature Meter with Large Digital LCD Display Monitor Drinking Water Quality, Hydroponics and More(Cannot Test pH) (1/5)

in 1 Digital Multifunctional Tester TDS EC and Temperature Meter with Large Digital LCD Display Monitor Drinking Water Quality, Hydroponics and More(Cannot Test pH)

~~£16.99~~

Free shipping

Digital Water Quality Tester Meter with Large Digital LCD Display for Home Industry Hydrotherapy, Drinking Water Quality Monitor(Black) (1/5)

Digital Water Quality Tester Meter with Large Digital LCD Display for Home Industry Hydrotherapy, Drinking Water Quality Monitor(Black) (2/5)

Digital Water Quality Tester Meter with Large Digital LCD Display for Home Industry Hydrotherapy, Drinking Water Quality Monitor(Black) (3/5)

Digital Water Quality Tester Meter with Large Digital LCD Display for Home Industry Hydrotherapy, Drinking Water Quality Monitor(Black) (4/5)

Digital Water Quality Tester Meter with Large Digital LCD Display for Home Industry Hydrotherapy, Drinking Water Quality Monitor(Black)

~~£16.99~~

Free shipping

in 1 Digital Water Quality Tester TDS Meter LCD Digital Tester Temperature Meter Conductivity 0.9999PPM Drinking Water Quality Monitor Pen Tester (1/5)

in 1 Digital Water Quality Tester TDS Meter LCD Digital Tester Temperature Meter Conductivity 0.9999PPM Drinking Water Quality Monitor Pen Tester

~~£16.99~~

Free shipping

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) (1/5)

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)

~~£16.99~~

Free shipping

Tester of quality of water 3 in 1 LCD digital - Tester water TDS EC - High precision for water potable, pool, aquarium, pond to fish and pool (1/5)

Tester of quality of water 3 in 1 LCD digital - Tester water TDS EC - High precision for water potable, pool, aquarium, pond to fish and pool (2/5)

Tester of quality of water 3 in 1 LCD digital - Tester water TDS EC - High precision for water potable, pool, aquarium, pond to fish and pool (3/5)

Tester of quality of water 3 in 1 LCD digital - Tester water TDS EC - High precision for water potable, pool, aquarium, pond to fish and pool (4/5)

Tester of quality of water 3 in 1 LCD digital - Tester water TDS EC - High precision for water potable, pool, aquarium, pond to fish and pool

~~£24.40~~

Free shipping

2PCS Water Quality Tester, Electronic pH Meter Tester, TDS&EC Temperature Meter, 4 in 1 Water Quality Tester with LCD Display, High Accuracy, Resolution 0.01, for Swimming Pool, Drinking Water (1/5)

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

~~£27.80~~

Free shipping

Water Quality Tester - Portable Water Quality Tester, Water Impurity Tester, Electrolyzer Machine Test Monitor (1/5)

Water Quality Tester - Portable Water Quality Tester, Water Impurity Tester, Electrolyzer Machine Test Monitor (2/5)

Water Quality Tester - Portable Water Quality Tester, Water Impurity Tester, Electrolyzer Machine Test Monitor (3/5)

Water Quality Tester - Portable Water Quality Tester, Water Impurity Tester, Electrolyzer Machine Test Monitor (4/5)

Water Quality Tester - Portable Water Quality Tester, Water Impurity Tester, Electrolyzer Machine Test Monitor

~~£17.80~~

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

~~£17.80~~

Free shipping

TDS Meter - Drinking Water Quality Tester - High Accuracy - Measuring Range: 0-9999 ppm - Digital Purity Tester for Pools, Spas, Aquariums (1/5)

TDS Meter - Drinking Water Quality Tester - High Accuracy - Measuring Range: 0-9999 ppm - Digital Purity Tester for Pools, Spas, Aquariums (2/5)

TDS Meter - Drinking Water Quality Tester - High Accuracy - Measuring Range: 0-9999 ppm - Digital Purity Tester for Pools, Spas, Aquariums (3/5)

TDS Meter - Drinking Water Quality Tester - High Accuracy - Measuring Range: 0-9999 ppm - Digital Purity Tester for Pools, Spas, Aquariums (4/5)

TDS Meter - Drinking Water Quality Tester - High Accuracy - Measuring Range: 0-9999 ppm - Digital Purity Tester for Pools, Spas, Aquariums

~~£17.80~~

Free shipping

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 (1/5)

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

~~£17.80~~

Free shipping

3 in 1 Digital Multifunctional Tester TDS EC and Temperature Measurement with Large Digital LCD Display Monitor Drinking Water Quality, Hydroponics and More (Cannot Test pH) NPTERBL (1/5)

3 in 1 Digital Multifunctional Tester TDS EC and Temperature Measurement with Large Digital LCD Display Monitor Drinking Water Quality, Hydroponics and More (Cannot Test pH) NPTERBL

~~£16.99~~

Free shipping

2 in 1 Water Quality Tester Digital PH Chlorine CL2 Tester Portable with Large Screen for Swimming Pool Spa Water Quality Analyzer NPTERBL (1/5)

2 in 1 Water Quality Tester Digital PH Chlorine CL2 Tester Portable with Large Screen for Swimming Pool Spa Water Quality Analyzer NPTERBL (2/5)

2 in 1 Water Quality Tester Digital PH Chlorine CL2 Tester Portable with Large Screen for Swimming Pool Spa Water Quality Analyzer NPTERBL (3/5)

2 in 1 Water Quality Tester Digital PH Chlorine CL2 Tester Portable with Large Screen for Swimming Pool Spa Water Quality Analyzer NPTERBL (4/5)

2 in 1 Water Quality Tester Digital PH Chlorine CL2 Tester Portable with Large Screen for Swimming Pool Spa Water Quality Analyzer NPTERBL

~~£31.58~~

Free shipping

Water Tester - a highly accurate and reliable portable water quality testing tool for testing drinking water or swimming pools (1/5)

Water Tester - a highly accurate and reliable portable water quality testing tool for testing drinking water or swimming pools (2/5)

Water Tester - a highly accurate and reliable portable water quality testing tool for testing drinking water or swimming pools (3/5)

Water Tester - a highly accurate and reliable portable water quality testing tool for testing drinking water or swimming pools (4/5)

Water Tester - a highly accurate and reliable portable water quality testing tool for testing drinking water or swimming pools

~~£31.58~~

Free shipping

LCD TDS-3 Meter for Drinking Water Quality Tester Digital Temperature PPM Test Measurer Pen Analyzer for Measuring Drinking Water, Hydroponics, Aquarium, Pool and Spa (1/5)

LCD TDS-3 Meter for Drinking Water Quality Tester Digital Temperature PPM Test Measurer Pen Analyzer for Measuring Drinking Water, Hydroponics, Aquarium, Pool and Spa

~~£16.99~~

Free shipping

Tester of Conductivity Electric 3 in 1 Blue, Pen of Measurement TDS EC for the Analyse of Quality of the Water - (1/3)

Tester of Conductivity Electric 3 in 1 Blue, Pen of Measurement TDS EC for the Analyse of Quality of the Water - (2/3)

Tester of Conductivity Electric 3 in 1 Blue, Pen of Measurement TDS EC for the Analyse of Quality of the Water -

~~£25.92~~

Free shipping

Tester of Conductivity Electric 3 in 1 Blue, Pen of Measurement TDS EC for the Analyse of Quality of the Water -

~~£25.92~~

Free shipping

$Mtre TDS-3 of water drinking LCD Numrique Portable Tester Mtre of Quality of l\\'Water Pen of Temperature and PPM Tester of Puret of l\\'Water 0-9990 PPM Water Drinking Cultivation Hydroponique (Not t (1/5)$ $Mtre TDS-3 of water drinking LCD Numrique Portable Tester Mtre of Quality of l\\'Water Pen of Temperature and PPM Tester of Puret of l\\'Water 0-9990 PPM Water Drinking Cultivation Hydroponique (Not t (2/5)$ $Mtre TDS-3 of water drinking LCD Numrique Portable Tester Mtre of Quality of l\\'Water Pen of Temperature and PPM Tester of Puret of l\\'Water 0-9990 PPM Water Drinking Cultivation Hydroponique (Not t (3/5)$ $Mtre TDS-3 of water drinking LCD Numrique Portable Tester Mtre of Quality of l\\'Water Pen of Temperature and PPM Tester of Puret of l\\'Water 0-9990 PPM Water Drinking Cultivation Hydroponique (Not t (4/5)$ $Mtre TDS-3 of water drinking LCD Numrique Portable Tester Mtre of Quality of l\\'Water Pen of Temperature and PPM Tester of Puret of l\\'Water 0-9990 PPM Water Drinking Cultivation Hydroponique (Not t (5/5)$

Mtre TDS-3 of water drinking LCD Numrique Portable Tester Mtre of Quality of l\\'Water Pen of Temperature and PPM Tester of Puret of l\\'Water 0-9990 PPM Water Drinking Cultivation Hydroponique (Not t

~~£25.46~~

Free shipping

Pen Of Test Tds For the analyse Of The Quality Of the water TO The Home - Supervision Precise Of Water Potables Without Battery Included- (1/3)

Pen Of Test Tds For the analyse Of The Quality Of the water TO The Home - Supervision Precise Of Water Potables Without Battery Included- (2/3)

Pen Of Test Tds For the analyse Of The Quality Of the water TO The Home - Supervision Precise Of Water Potables Without Battery Included-

~~£25.92~~

Free shipping

Pen Of Test Tds For the analyse Of The Quality Of the water TO The Home - Supervision Precise Of Water Potables Without Battery Included-

~~£25.92~~

Free shipping

Detector Of Quality Of the water Red Without Battery Wind To (1/3)

Detector Of Quality Of the water Red Without Battery Wind To (2/3)

Detector Of Quality Of the water Red Without Battery Wind To

~~£25.92~~

Free shipping

5-in-1 Digital pH Meter – pH, TDS, EC, and Temperature Tester – LCD Screen – Measuring Range 0-14 pH, 0-19990 ppm, ATC - BIO 5 EN (1/5)

5-in-1 Digital pH Meter – pH, TDS, EC, and Temperature Tester – LCD Screen – Measuring Range 0-14 pH, 0-19990 ppm, ATC - BIO 5 EN (2/5)

5-in-1 Digital pH Meter – pH, TDS, EC, and Temperature Tester – LCD Screen – Measuring Range 0-14 pH, 0-19990 ppm, ATC - BIO 5 EN (3/5)

5-in-1 Digital pH Meter – pH, TDS, EC, and Temperature Tester – LCD Screen – Measuring Range 0-14 pH, 0-19990 ppm, ATC - BIO 5 EN (4/5)

5-in-1 Digital pH Meter – pH, TDS, EC, and Temperature Tester – LCD Screen – Measuring Range 0-14 pH, 0-19990 ppm, ATC - BIO 5 EN

~~£26.31~~

Free shipping

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

~~£39.58~~

Free shipping

Water Quality Tester, PC-102B Electric Pool Tester CL2 Chlorine and pH Tester Pool and Spa Water Quality Analyzer with Probe pH Test Kit (1/5)

Water Quality Tester, PC-102B Electric Pool Tester CL2 Chlorine and pH Tester Pool and Spa Water Quality Analyzer with Probe pH Test Kit (2/5)

Water Quality Tester, PC-102B Electric Pool Tester CL2 Chlorine and pH Tester Pool and Spa Water Quality Analyzer with Probe pH Test Kit (3/5)

Water Quality Tester, PC-102B Electric Pool Tester CL2 Chlorine and pH Tester Pool and Spa Water Quality Analyzer with Probe pH Test Kit (4/5)

Water Quality Tester, PC-102B Electric Pool Tester CL2 Chlorine and pH Tester Pool and Spa Water Quality Analyzer with Probe pH Test Kit

~~£26.49~~

Free shipping

Pool Salinity Tester 5 in 1 Digital Salt Water pH & Salinity Meter Pool pH & Salinity Tester Salinity Meter for Swimming Pool, Hot Tub & Swim Spa (1/5)

Pool Salinity Tester 5 in 1 Digital Salt Water pH & Salinity Meter Pool pH & Salinity Tester Salinity Meter for Swimming Pool, Hot Tub & Swim Spa (2/5)

Pool Salinity Tester 5 in 1 Digital Salt Water pH & Salinity Meter Pool pH & Salinity Tester Salinity Meter for Swimming Pool, Hot Tub & Swim Spa (3/5)

Pool Salinity Tester 5 in 1 Digital Salt Water pH & Salinity Meter Pool pH & Salinity Tester Salinity Meter for Swimming Pool, Hot Tub & Swim Spa (4/5)

Pool Salinity Tester 5 in 1 Digital Salt Water pH & Salinity Meter Pool pH & Salinity Tester Salinity Meter for Swimming Pool, Hot Tub & Swim Spa

~~£21.04~~

Free shipping

Digital Water Tester TDS Meter - Ppm Meter, and Temperature Test Pen 3-in-1 Water Quality Tester (1/5)

Digital Water Tester TDS Meter - Ppm Meter, and Temperature Test Pen 3-in-1 Water Quality Tester (2/5)

Digital Water Tester TDS Meter - Ppm Meter, and Temperature Test Pen 3-in-1 Water Quality Tester (3/5)

Digital Water Tester TDS Meter - Ppm Meter, and Temperature Test Pen 3-in-1 Water Quality Tester (4/5)

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

~~£21.04~~

Free shipping

3 in 1 Digital Water Quality Tester, TDS, EC Meter and Temperature - TDS Meter for Drinking Water, Hydroponics, Pools, Aquariums (1/5)

3 in 1 Digital Water Quality Tester, TDS, EC Meter and Temperature - TDS Meter for Drinking Water, Hydroponics, Pools, Aquariums (2/5)

3 in 1 Digital Water Quality Tester, TDS, EC Meter and Temperature - TDS Meter for Drinking Water, Hydroponics, Pools, Aquariums (3/5)

3 in 1 Digital Water Quality Tester, TDS, EC Meter and Temperature - TDS Meter for Drinking Water, Hydroponics, Pools, Aquariums (4/5)

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

~~£21.04~~

Free shipping

3-in-1 TDS Tester pH Tester Swimming Pool Water Quality Test Conductivity Meter with LCD Display High Accuracy and Automatic Calibration Function (1/5)

3-in-1 TDS Tester pH Tester Swimming Pool Water Quality Test Conductivity Meter with LCD Display High Accuracy and Automatic Calibration Function

~~£21.04~~

Free shipping

4-in-1 Water Quality Tester – pH, TDS, EC, Temperature – Backlit LCD Display – 0.01 Accuracy for Swimming Pools and Aquaculture - 01 (1/5)

4-in-1 Water Quality Tester – pH, TDS, EC, Temperature – Backlit LCD Display – 0.01 Accuracy for Swimming Pools and Aquaculture - 01 (2/5)

4-in-1 Water Quality Tester – pH, TDS, EC, Temperature – Backlit LCD Display – 0.01 Accuracy for Swimming Pools and Aquaculture - 01 (3/5)

4-in-1 Water Quality Tester – pH, TDS, EC, Temperature – Backlit LCD Display – 0.01 Accuracy for Swimming Pools and Aquaculture - 01 (4/5)

4-in-1 Water Quality Tester – pH, TDS, EC, Temperature – Backlit LCD Display – 0.01 Accuracy for Swimming Pools and Aquaculture - 01

~~£27.18~~

Free shipping

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

~~£22.66~~

Free shipping

2-in-1 electronic pool tester for water quality, pH, and residual chlorine. (1/4)

2-in-1 electronic pool tester for water quality, pH, and residual chlorine. (2/4)

2-in-1 electronic pool tester for water quality, pH, and residual chlorine.

~~£21.39~~

Free shipping

Water Quality Tester Electrolyzer Water Quality Tester Electrolysis Iron Rods TDS Tester Electrolyzer Quick water quality testing for all water types (Yellow) (1/5)

Water Quality Tester Electrolyzer Water Quality Tester Electrolysis Iron Rods TDS Tester Electrolyzer Quick water quality testing for all water types (Yellow)

~~£27.12~~

Free shipping

Medidorr digitband orf TDS forr the Qubanditand orf the torgutor, with Screin LCD, medidorr orf withductivithed orf 0,9990 ppm, mornorrtorr orf Qubanditand orf the torgutor porttorbgivthere, borlígrto (1/4)

Medidorr digitband orf TDS forr the Qubanditand orf the torgutor, with Screin LCD, medidorr orf withductivithed orf 0,9990 ppm, mornorrtorr orf Qubanditand orf the torgutor porttorbgivthere, borlígrto

~~£13.87~~

Free shipping

2-in-1 Water Quality Tester, Digital pH and Chlorine Tester, Portable Cl2 Tester with Large Screen for Swimming Pool and Spa Water Quality Analyzer (1/5)

2-in-1 Water Quality Tester, Digital pH and Chlorine Tester, Portable Cl2 Tester with Large Screen for Swimming Pool and Spa Water Quality Analyzer

~~£62.45~~

Free shipping

Piece 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 (1/5)

Piece 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

~~£21.34~~

Free shipping

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

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

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

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

~~£23.13~~

Free shipping

Battery-free red water quality detector (Related offer) (1/3)

Battery-free red water quality detector (Related offer)

~~£22.98~~

Free shipping

Digital LCD Water Quality Tester Meter, Professional Measuring Pen for Water Hardness and Mineral Impurity Content (1/4)

Digital LCD Water Quality Tester Meter, Professional Measuring Pen for Water Hardness and Mineral Impurity Content (2/4)

Digital LCD Water Quality Tester Meter, Professional Measuring Pen for Water Hardness and Mineral Impurity Content (3/4)

Digital LCD Water Quality Tester Meter, Professional Measuring Pen for Water Hardness and Mineral Impurity Content

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. (1/5)

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.

~~£31.58~~

Free shipping

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

~~£33.58~~

Free shipping