GISNPA pH Meter, 7 in 1 pH/TDS/EC/ORP/S.G/Salinity/Temp Meter, Digital pH Tester with ATC & LCD Backlight for Drinking Water, Hydroponics, Swimming
Atlas Scientific Lab Grade pH Probe 0 − 14 pH: Amazon.com: Industrial & Scientific,TK298PLUS pH Meter 2.0~12.0pH Sharp Tip Long Glass Sensor with Automat – Tekcoplus Ltd.,GISNPA pH Meter, 7 in 1 pH/TDS/EC/ORP/S.G/Salinity/Temp Meter, Digital pH Tester with ATC & LCD Backlight for Drinking Water, Hydroponics, Swimming ,0-14 pH Electrode Probe, pH Meter with Replacement BNC Connector and 300cm Cable Sensor for ph Monitor Controller Tester Meter Kit Set for Aquarium