Fish Tanks & Supplies
7 in 1 Digital Water Tester, Digital PH Meter, Water Quality Tester, PH Salinity/ORP Temperature Meter for Swimming Pool
7-IN-1 ADVANCED WATER TESTING TECHNOLOGY: Accurately measures pH, temperature, dissolved hydrogen (up to 2400 ppb with ±1 ppb accuracy), ORP, and salinity in compact device for comprehensive water quality analysis of drinking water, juices, coffee,...
https://www.bizrate.co.uk/fishtanks_supplies/7-in-1-digital-water-oid40460903222.html
