Apera Instruments PH20 Value pH Meter, Pocket Tester, Waterproof, ±0.1 Accuracy, 0 14 Range, ±0.5C Temperature Sensor, Complete kit

Easy Auto calibration with Buffer recognition; Auto Temp. Compensation (ATC) ensures accuracy in variant temperatures (0-50.0C) Complete Kit with ready-to-use calibration solutions, batteries, and a lanyard in a portable carrying case Auto recognition of stable values improves consistency so you don't have to guess when to manually hold measurement An ultra-clear 180 viewing angle screen with dual display of Temp./pH and indications of completed calibrations and stable readings 2000 hours' continuous operation, powered by AAA batteries