AP-1 AquaPro TDS And Temperature Water Tester and Monitor by HM Digital. Measure the tap water coming in vs. the purified water going out of your water filtration system at any time. AP-1 will tell you how pure your drinking water is, and when you need to change filters. Measures TDS (Total Dissolved Solids) and water temperature.
AP-1 AquaPro TDS Water Meter Features:
Range: 0-5000 ppm
Resolution: 1 ppm
Power source: 1 x 3V button cell battery (included)
Battery life: approx. 1000 hours of continuous use
Manufacture Warranty: 1 year
Use AP-1 AquaPro water quality meter to determine when your Reverse Osmosis filter needs to be changed.