The transmitter Type SE56 (without a display in the compact variant or with a display in the compact or remote variant), connected to the electro-magnetic sensor (compact or remote variant) Type S051, S054, S055 or S056, is designed for liquids with a minimum conductivity of 5 μS/cm. The device can be parameterised manually either via three buttons (variant with a display) or by a computer via a serial interface. In the standard variant, the device is supplied with one or two transistor outputs and one digital input. Further options are available, e.g. high frequency output, current output.