Waterproof pH Testr Meter Has Three-Point USA or NIST Push-Button Calibration with Buffer Recognition
±0.01 pH accuracy is displayed on a large, easy-to-read, dual-display LCD. 0.01 resolution. Provides simultaneous temperature display: 0°–50°C (32°–122°F). Keypad clicks to confirm operation. Freeze and auto shut-off functions. Freeze function is useful when measuring in low light or confined spaces. Waterproof pH Testr 30 Meter offers self-diagnostic messages, nonvolatile memory and automatic temperature compensation.