Sensors & Float Valves: Scale on sensors causes false readings and erratic operation

and extends the operational life of your ORP57 PRO Tester investment

HM Digital PH-P7 pH 7

NaCl Range: 0

Each filter has a verified* filtration capacity of 200 gallons

Hanna HI98118 GroLine pH/Temperature Tester | Waterproof Hydroponics Meter Milwaukee MW802 PRO 3-in-1 pH Sensors & Float Valves: ScaleThe GroLine HI98118 pH temperature tester is our latest pocket meter for measuring the pH of a hydroponic nutrient solution. This modern looking meter is only 0. 7" thick and extremely ergonomic, fitting comfortably in your hand. The HI98118 has a very large easy to read LCD display that shows both pH and temperature along with calibration, stability and low battery indicators. All operations are simplified to two buttons. One is for turning the meter