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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4195 products

Milwaukee C65 Low Range Waterproof Conductivity Pen with ATC and Replaceable ElectrodeMilwaukee C65 Low Range Waterproof Conductivity Pen with ATC and Replaceable Electrode
Milwaukee
Milwaukee C65 Low Range Waterproof Conductivity Pen with ATC and Replaceable Electrode Sale price£48.13
Milwaukee CD601 Digital Conductivity Pen (EC)Milwaukee CD601 Digital Conductivity Pen (EC)
Milwaukee
Milwaukee CD601 Digital Conductivity Pen (EC) Sale price£34.31
Milwaukee CD600 Digital Total Dissolved Solids Pen (TDS)Milwaukee CD600 Digital Total Dissolved Solids Pen (TDS)
Milwaukee
Milwaukee CD600 Digital Total Dissolved Solids Pen (TDS) Sale price£34.31
Milwaukee CD97 Digital Low Range TDS PenMilwaukee CD97 Digital Low Range TDS Pen
Milwaukee
Milwaukee CD97 Digital Low Range TDS Pen Sale price£34.31
Milwaukee T75 Waterproof Low Range Total Dissolved Solids Pen (TDS)Milwaukee T75 Waterproof Low Range Total Dissolved Solids Pen (TDS)
Milwaukee
Milwaukee T75 Waterproof Low Range Total Dissolved Solids Pen (TDS) Sale price£48.13
Milwaukee CD611 Digital Conductivity Pen (EC)Milwaukee CD611 Digital Conductivity Pen (EC)
Milwaukee
Milwaukee CD611 Digital Conductivity Pen (EC) Sale price£34.31
Milwaukee C66 Waterproof High Range Conductivity Pen with ATC and Replaceable ElectrodeMilwaukee C66 Waterproof High Range Conductivity Pen with ATC and Replaceable Electrode
Milwaukee
Milwaukee C66 Waterproof High Range Conductivity Pen with ATC and Replaceable Electrode Sale price£48.13
Milwaukee pH51 Waterproof pH Tester with Replaceable ProbeMilwaukee pH51 Waterproof pH Tester with Replaceable Probe
Milwaukee
Milwaukee pH51 Waterproof pH Tester with Replaceable Probe Sale price£48.13
Lovibond
Lovibond W586/OG/10 Optical Glass Sale priceFrom £82.41 Regular price£94.72
Save £180.04
Lovibond Red, Yellow, Neutral Filter Set (Fx)
Lovibond
Lovibond Red, Yellow, Neutral Filter Set (Fx) Sale price£3,420.83 Regular price£3,600.87
HACH DRB200 Dry thermostat heating blockHACH DRB200 Dry thermostat heating block
HACH
HACH DRB200 Dry thermostat heating block Sale priceFrom £1,174.00
HACH Free Chlorine 0-600 mg/L, 100 tests Test Strips
HACH
HACH Free Chlorine 0-600 mg/L, 100 tests Test Strips Sale price£40.10
HACH pH 4-9 Test Strips
HACH
HACH pH 4-9 Test Strips Sale price£15.70
Save £2.63
Hann Instruments HI-700661P Electrode cleaning Solution for Agricultural applications
Hanna Instruments
Hann Instruments HI-700661P Electrode cleaning Solution for Agricultural applications Sale price£50.07 Regular price£52.70
Save £55.57
Lovibond Vario Phosphate 3 10ml Expiry 08/25
Lovibond
Lovibond Vario Phosphate 3 10ml Expiry 08/25 Sale price£7.50 Regular price£63.07
Save £58.07
Lovibond Vario Phosphate 3 10ml Expiry 07/25
Lovibond
Lovibond Vario Phosphate 3 10ml Expiry 07/25 Sale price£5.00 Regular price£63.07
Save £1.53
Lovibond TTC/MALT Dipslides (Best Before 01.09.2025)Lovibond TTC/MALT Dipslides (Best Before 01.09.2025)
Lovibond
Lovibond TTC/MALT Dipslides (Best Before 01.09.2025) Sale price£16.75 Regular price£18.28
Sold outSave £7.04
eXact ID Strip Micro Calcium Hardness (Expiry Date 31.8.25)
ITS
eXact ID Strip Micro Calcium Hardness (Expiry Date 31.8.25) Sale price£4.50 Regular price£11.54
Save £11.50
Nitrate/Nitrite Nitrogen, btl 50 (Expiry 31.8.25)Nitrate/Nitrite Nitrogen, btl 50 (Expiry 31.8.25)
ITS
Nitrate/Nitrite Nitrogen, btl 50 (Expiry 31.8.25) Sale price£4.99 Regular price£16.49
Trace2o Aquacheck 2000Trace2o Aquacheck 2000
Trace2o
Trace2o Aquacheck 2000 Sale priceFrom £1,295.00
Palintest Water Test Strips (6 in 1 Test Strips) x 20 expired 03/25Palintest Water Test Strips (6 in 1 Test Strips) x 20 expired 03/25
Palintest
Palintest Water Test Strips (6 in 1 Test Strips) x 20 expired 03/25 Sale price£10.00
HACH COD standard solution, 1000 mg/L O₂, 200 mL
Hach
HACH COD standard solution, 1000 mg/L O₂, 200 mL Sale price£60.00
HACH pH Test Strip, 7.5 - 14 pH units, 100 tests
Hach
HACH pH Test Strip, 7.5 - 14 pH units, 100 tests Sale price£49.30
Lovibond
Lovibond Battery Cover Screws Sale price£0.75

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