AQUA MEDIC pH Meter Set A microprocessor-controlled pH monitoring and control device. The pH Meter Set uses a modern microprocessor that provides high-precision measurement and control. The pH Meter Set is used to control the precise pH values in the tank or calcium reactor. The device can operate up to 500 watts using the supplied external power socket. When the calibration switch is selected, the device will automatically calibrate itself with the electrode. The device includes a plastic shaft pH electrode with BNC fitting and the correct calibration fluids.