PH-2989 Online PH/ORP/Temperature Monitor    Technical Specification:  Range  pH 0.00 ~14.00 pH   ORP -1999 ~ 1999mV   Temp 0 ~ 50°C Resolution pH 0.01 pH   ORP 1mV   Temp 0.1°C Accuracy pH ±0.1 pH   ORP ±5mV   Temp ±1 °C Automatic Temperature Compensation 0 ~ 50°C Environment 0 ~ 50°C;   Humidity:≤95℅ Power Supply 6V DC (include), with adaptor Dimensions 130mm x 70mm x 31 mm Weight 200g   Close >>