Hanna Instruments HI98129 Low Range Combo pH, EC, TDS and Temperature Meter

3 Sensors in a Single Tester: pH electrode with extractable junction - Amperometric EC/TDS sensor - Exposed temperature probe for faster EC and TDS (ppm) readings Waterproof: Designed to float if accidentally dropped in sample Wide pH Range: pH range is from 0.00 to 14.00 pH Stability indicator: Meter displays a clock tag that will disappear when the reading has achieved stability Auto-off: Auto-off feature automatically shuts off meter after 8 minutes of non-use to maximize battery life