KL-169-E ORP/Redox Tester     Model ORP-169E Measuring range -1999~1999mV Accuracy ±5mV Resolution 1mV Operating Temperature 0°C~50°C Automatic Temperature Compensation 0°C~50°C Power Supply 4×1.5V(AG13) Calibration Manual 1 point Dimensions 188mm×35mm×35mm Weight 98g   Close >>