Best Selling Products

Our Best Selling Products category features the most popular and trusted water testing solutions chosen by professionals and everyday users alike. From quick and easy test kits to advanced meters and reagents, these products have earned their place as customer favourites for their reliability, accuracy, and ease of use. Whether you’re testing pool water, drinking water, or industrial systems, these top picks deliver the dependable results you can count on.

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4196 products

Lovibond PTSA calibration set (0, 200, 1000 ppb)
Lovibond
Lovibond PTSA calibration set (0, 200, 1000 ppb) Sale price£67.11
HACH Iron cuvette test 0.2-6.0 mg/L Fe, 25 testsHACH Iron cuvette test 0.2-6.0 mg/L Fe, 25 tests
HACH
HACH Iron cuvette test 0.2-6.0 mg/L Fe, 25 tests Sale price£115.00
HACH Sulphate cuvette test 150-900 mg/L SO₄, 25 testsHACH Sulphate cuvette test 150-900 mg/L SO₄, 25 tests
HACH
HACH Sulphate cuvette test 150-900 mg/L SO₄, 25 tests Sale price£115.00
HACH Sulphate cuvette test 40-150 mg/L SO₄, 25 testsHACH Sulphate cuvette test 40-150 mg/L SO₄, 25 tests
HACH
HACH Sulphate cuvette test 40-150 mg/L SO₄, 25 tests Sale price£115.00
HACH Citric Acid Reagent Powder Pillows
HACH
HACH Citric Acid Reagent Powder Pillows Sale price£38.00
HACH Gelex Turbidity Standard, 1 NTU
HACH
HACH Gelex Turbidity Standard, 1 NTU Sale price£98.00
HACH Phosphate (ortho/total) cuvette test 2.0 -20.0 mg/L PO₄-P, 25 tests
HACH
HACH Phosphate (ortho/total) cuvette test 2.0 -20.0 mg/L PO₄-P, 25 tests Sale price£175.00
HACH Laton Total Nitrogen cuvette test 5-40 mg/L TN, 25 testsHACH Laton Total Nitrogen cuvette test 5-40 mg/L TN, 25 tests
HACH
HACH Laton Total Nitrogen cuvette test 5-40 mg/L TN, 25 tests Sale price£175.00
HACH COD cuvette test 100-2000 mg/L O₂, 25 testsHACH COD cuvette test 100-2000 mg/L O₂, 25 tests
HACH
HACH COD cuvette test 100-2000 mg/L O₂, 25 tests Sale price£115.00
HACH COD cuvette test 1,000-10,000 mg/L O₂, 25 testsHACH COD cuvette test 1,000-10,000 mg/L O₂, 25 tests
HACH
HACH COD cuvette test 1,000-10,000 mg/L O₂, 25 tests Sale price£115.00
TEST ALL WATER
Poollab 1.0 Calibration Sale price£95.00
Milwaukee MW14 Digital Iron TesterMilwaukee MW14 Digital Iron Tester
Milwaukee
Milwaukee MW14 Digital Iron Tester Sale price£92.44
Milwaukee MW806 4-in-1 pH/EC/TDS/Temp. Combo Meter with ATCMilwaukee MW806 4-in-1 pH/EC/TDS/Temp. Combo Meter with ATC
Milwaukee
Milwaukee MW806 4-in-1 pH/EC/TDS/Temp. Combo Meter with ATC Sale price£458.56
Milwaukee MC510 PRO Digital Redox ORP ControllerMilwaukee MC510 PRO Digital Redox ORP Controller
Milwaukee
Milwaukee MC510 PRO Digital Redox ORP Controller Sale price£222.88
Milwaukee M10010B pH 10.01 Calibration Solution Sachets (25)
Milwaukee
Milwaukee M10010B pH 10.01 Calibration Solution Sachets (25) Sale price£34.19
Milwaukee MI526-25 Powder Reagents for Free Chlorine Photometer
Milwaukee
Milwaukee MI526-25 Powder Reagents for Free Chlorine Photometer Sale price£12.69
Milwaukee MP810 Dosing Pump for ControllerMilwaukee MP810 Dosing Pump for Controller
Milwaukee
Milwaukee MP810 Dosing Pump for Controller Sale price£141.06
Milwaukee TH310 Digital ThermometerMilwaukee TH310 Digital Thermometer
Milwaukee
Milwaukee TH310 Digital Thermometer Sale price£54.44
Milwaukee MW102 PRO+ 2-in-1 pH and Temperature Meter with ATCMilwaukee MW102 PRO+ 2-in-1 pH and Temperature Meter with ATC
Milwaukee
Milwaukee MW102 PRO+ 2-in-1 pH and Temperature Meter with ATC Sale price£193.75
Milwaukee MA9004 pH 4.01 Calibration Solution
Milwaukee
Milwaukee MA9004 pH 4.01 Calibration Solution Sale price£16.44
Milwaukee EC59 PRO Waterproof 3-in-1 Conductivity / TDS & Temperature Tester with Replaceable ProbeMilwaukee EC59 PRO Waterproof 3-in-1 Conductivity / TDS & Temperature Tester with Replaceable Probe
Milwaukee
Milwaukee EC59 PRO Waterproof 3-in-1 Conductivity / TDS & Temperature Tester with Replaceable Probe Sale price£77.25
Milwaukee CD610 Digital High Range TDS PenMilwaukee CD610 Digital High Range TDS Pen
Milwaukee
Milwaukee CD610 Digital High Range TDS Pen Sale price£34.31
Milwaukee PH600 Digital pH PenMilwaukee PH600 Digital pH Pen
Milwaukee
Milwaukee PH600 Digital pH Pen Sale price£34.31
Milwaukee pH54 Waterproof pH Tester with Replaceable ProbeMilwaukee pH54 Waterproof pH Tester with Replaceable Probe
Milwaukee
Milwaukee pH54 Waterproof pH Tester with Replaceable Probe Sale price£50.69

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