© Jola
Jola presents an environmental protection sensor that uses conductivity measurement to distinguish between 'good and bad' in the presence of highly electrically conductive, water-polluting liquids. While rainwater has a very low electrical conductivity, leaking liquids such as glycol, silage leachate, liquid manure, acid or lye have a relatively high electrical conductivity. This electrical conductivity is therefore dependent on the medium and also strongly dependent on the temperature. In the environmental protection sensor, Jola has equipped an electrode designed for conductivity measurement with a temperature-compensated voltage divider. An electrode relay to be connected to this evaluates the voltage ratio between the applied AC safety extra-low voltage and the voltage drop caused by the liquid at the electrodes. The connection is made using 3-wire technology. The electrode relay 'NR 3 A' has an additional connection terminal as standard. The temperature compensation of the sensor is designed for the atmospheric temperature range from -20 to +60 °C. The electrode relay has two colored LEDs for the switching status display and a potential-free changeover output contact.
