At less than 8 inches tall and 1.5 inches wide, the Milwaukee Instruments Martini pH55 Waterproof pH & Temperature Tester is an accurate tester that fits anywhere! This waterproof meter also displays temperature in Fahrenheit and Celsius, performs temperature compensation and two-point calibration automatically, and its probe is replaceable. Reads temperature from -5.0 to 60.0°C with an accuracy of ±0.3°C. Reads pH from -2.0 to 16.0 with an accuracy of ± 0.1 pH. Protected by two-year manufacturer’s warranty.