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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4194 products

Lovibond Ammonia Reagent No 2Lovibond Ammonia Reagent No 2
Lovibond
Lovibond Ammonia Reagent No 2 Sale price£10.44
Save £56.68
Lovibond AF509/C Diesel Fuel Kit, 1-5Lovibond AF509/C Diesel Fuel Kit, 1-5
Lovibond
Lovibond AF509/C Diesel Fuel Kit, 1-5 Sale price£1,076.89 Regular price£1,133.57
Lovibond AF414 Alkalinity P Test KitLovibond AF414 Alkalinity P Test Kit
Lovibond
Lovibond AF414 Alkalinity P Test Kit Sale price£51.97
Save £10.66
Lovibond AF432 Sulphate Low Range TestLovibond AF432 Sulphate Low Range Test
Lovibond
Lovibond AF432 Sulphate Low Range Test Sale price£71.32 Regular price£81.98
Save £7.76
Lovibond AF427 Nitrite Test KitLovibond AF427 Nitrite Test Kit
Lovibond
Lovibond AF427 Nitrite Test Kit Sale price£51.97 Regular price£59.73
Save £59.02
Lovibond AF116A Chlorine & pH Kit
Lovibond
Lovibond AF116A Chlorine & pH Kit Sale price£394.95 Regular price£453.97
Lamotte Iodine Test Papers
Lamotte
Lamotte Iodine Test Papers Sale price£11.03
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LEADQuick Water Reagent SetLEADQuick Water Reagent Set
ITS
LEADQuick Water Reagent Set Sale price£62.09
Lovibond
Lovibond KS63 - FE6 - Thioglycolate RGT _ Molybdate HR RGT Sale price£16.05 Regular price£18.45
KS329 Alkalinity CartridgeKS329 Alkalinity Cartridge
Lovibond
KS329 Alkalinity Cartridge Sale price£17.52
HydroCheck HC1000 temperature probe Trace2oHydroCheck HC1000 temperature probe Trace2o
Trace2o
HydroCheck HC1000 temperature probe Trace2o Sale price£32.80
Trace2o
Hardness, Magnesium Trace2o Sale price£60.00
Save £4.51
Hanna Insturments HI-762 Ultra Low Range Free Chlorine Handheld Colorimeter, Checker®HC(with 25 tests)
Hanna Instruments
Hanna Insturments HI-762 Ultra Low Range Free Chlorine Handheld Colorimeter, Checker®HC(with 25 tests) Sale price£85.69 Regular price£90.20
Save £32.07
Hanna Instruments-99141 Portable Waterproof pH meter Boilers and Cooling Towers
Hanna Instruments
Hanna Instruments-99141 Portable Waterproof pH meter Boilers and Cooling Towers Sale price£609.33 Regular price£641.40
Hanna Instruments-99121 Direct Soil pH Meter
Hanna Instruments
Hanna Instruments-99121 Direct Soil pH Meter Sale price£541.11
Trace2o
Hardness, Calcium (HR) Trace2o Sale price£62.00
Save £8.83
Hanna Instruments-98128 Pocket pHep5 Water Resistant pH Tester
Hanna Instruments
Hanna Instruments-98128 Pocket pHep5 Water Resistant pH Tester Sale price£167.87 Regular price£176.70
Save £7.76
Hanna Instruments-98127 Pocket pHep4 Water Resistant pH TesterHanna Instruments-98127 Pocket pHep4 Water Resistant pH Tester
Hanna Instruments
Hanna Instruments-98127 Pocket pHep4 Water Resistant pH Tester Sale price£147.54 Regular price£155.30
Save £4.04
Hanna Instruments-98318 GroLine Waterproof EC/TDS (ppm) Tester
Hanna Instruments
Hanna Instruments-98318 GroLine Waterproof EC/TDS (ppm) Tester Sale price£76.76 Regular price£80.80
Save £4.04
Hanna Instruments-98118 GroLine Waterproof Hydroponic pH & Temperature TesterHanna Instruments-98118 GroLine Waterproof Hydroponic pH & Temperature Tester
Hanna Instruments
Hanna Instruments-98118 GroLine Waterproof Hydroponic pH & Temperature Tester Sale price£76.76 Regular price£80.80
Save £6.41
Hanna Instruments-98331 Groline Direct Soil Conductivity (EC) & Temperature Tester
Hanna Instruments
Hanna Instruments-98331 Groline Direct Soil Conductivity (EC) & Temperature Tester Sale price£121.79 Regular price£128.20
Hanna Instruments-96739-11 CalCheck standards for Fluoride HR, 0.0 and 10.0 ppm
Hanna Instruments
Hanna Instruments-96739-11 CalCheck standards for Fluoride HR, 0.0 and 10.0 ppm Sale price£279.87
Save £19.41
Hanna Instruments-981420 Groline Monitor
Hanna Instruments
Hanna Instruments-981420 Groline Monitor Sale price£368.89 Regular price£388.30
Save £13.68
Hanna Instruments-9814 Groline Hydroponic Portable pH/EC/TDS/Temperature MeterHanna Instruments-9814 Groline Hydroponic Portable pH/EC/TDS/Temperature Meter
Hanna Instruments
Hanna Instruments-9814 Groline Hydroponic Portable pH/EC/TDS/Temperature Meter Sale price£259.92 Regular price£273.60

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