These electronic control devices enable monitoring and automatic level adjustment of an electrical current liquid conductor. Widely used in general reservoir automation, the RNW relays can also be used in several applications such as prevention of dry pump operation, monitoring against filling tank overflow, activation of solenoids or alarms/lighting. This series offers digital electronics that provide high precision, repeatability and noise resistance. The supply system is isolated from the electronic circuit, therefore ensuring greater user safety.
The operating principle is based on the measuring of the electrical resistance of the reservoir liquid through electrodes that work as liquid presence/absence sensors. To optimize their performance, the relay has a sensitivity DIAL enabling the electronic circuit to be adjusted to the liquid resistance.
The electrodes/probes are available in 2 versions, shaft or pendulum, and the difference between them is the assembly type.The following functions are available for the Level Relays:
- RNW EN - Filling
- RNW ES - Draining