The conductive conductivity measuring transducer measures the conductivity of liquids in conjunction with conductive conductivity measuring cells with the cell constants K = 0.01, 0.1, 1.0 and 10.0. The device has a freely programmable relay (changeover contact). The device is programmed exclusively via the setup connection (notebook/PC) with an existing setup program. The voltage is supplied via a power supply unit DC 20 ... 30 V.