RO33 Online Double PH Monitor     Model RO33 Range 0.00 ~14.00 pH Resolution 0.01 pH Accuracy ±0.1 pH Temperature Compensation 0 to 50°C Power Supply 6V DC (include), with adapter Environment 0 ~ 50°C;   Humidity:≤95℅ Dimensions 88mm x 55mm x 23 mm Weight 135g   Close >>