pH- mV- Temperature Meter Description: PH-099, designed for simultaneous pH and ORP measurements. It also reads temperature, which is continuously displayed on the dual level LCD. It is a waterproof pH, ORP and temperature meter. All pH readings are automatically temperature compensated(ATC). Measurements are highly accurate with a unique stability indicator right on the LCD. The pH electrode, supplied with the meter, is interchangeable and can be easily replaced by the user. Technology Parameters >> Range mV 0 ~ 1999mV pH 0.00 ~ 14.00 pH Temp 0 ~ C Resolution mV 1 mV pH 0.01 pH Temp 0.1C Accuracy mV 5mV pH 0.1 pH Temp 1C Automatic Temperature Compensation 0 ~ 50C Electrode replaceable pH electrode (included) fixed ORP sensor Power Supply 4 x 1.5V(AG13) Environment 0 to 50C Dimensions 170 x 40 x 23 mm Weight 100 g Weight:0.33 Dimensions:20*9*6