MODEL : 100pH Display : 3 1/2 Digit LCD 12.5 mm Range : 0.00 - 14.00 pH Auto Temp Compensation : 0 - 100 °C With PT 100 Sensor Set Limits : 2 High and Low Alarm Limits : 2 High Hi and Low Lo Transmitter : 4 - 20 mA Isolated Accuracy : 0.5% ± 1 Digit Input Impedence : > 10¹² OHMS Calibration : : pH 4 and pH7