The very small measuring amplifier for pH and Redox type M3720 converts the electrode signal to a 4…20mA 2-wire signal.
The M3720 works with a resolution of 12 bit, is pre-calibrated and connected between the electrode and the signal acquisition instrument (e. g. PLC). Process control systems or any other control electronics may be connected to the amplifiers output.
The electrode may be calibrated at the amplifier by a push button. Two LEDs indicate the calibration status. The hold function can freeze and release the output signal at any time.
Sensor input and output are galvanically isolated from the output and power supply. The robust housing fulfills the protected class IP67 and allows application in rough environments.
Optionally a 2-wire temperature compensation up to 100°C is available. pH/mV-electrodes with build-in temperature sensors are accepted by the amplifier.
All settings and measured values may be read out and changed by the Modbus protocol.