PH Meter/Transmitter with 31/2 Digit LED Display is compatible to all types of pH electrodes with electrical null point at 7.00 pH. The pH Meter/Transmitter is provided with calibration facility for A.P. And slope in the front panel. The pH Meter/Transmitter has high input impedance circuitry that ensures accurate reading. PH Meter/Transmitter with 31/2 Digit LED Display is designed for continuous use and offered with auto or manual temperature compensation.