Reliable level switching matters most when conductive liquids have to be controlled safely in demanding process environments. This relay evaluates one or two limit levels from conductive probes and converts the signal into relay outputs for tasks such as overflow protection, dry-run protection, two-point pump control and moisture detection.
The adjustable sensitivity helps match the switching point to the liquid conductivity, with ranges up to ≤ 200 kΩ or ≥ 5 µS/cm. An adjustable switching delay of up to around 8 seconds helps suppress unwanted switching caused by wave movement in the tank.
For hazardous-area applications, the ExSRA-100-U0 allows connection of electrodes installed in Ex areas up to Zone 0. Line break monitoring with fault relay supports dependable operation, while the wide-range supply of 20...253 V AC / 20...125 V DC simplifies use across common power systems.
The relay evaluates a small AC current between the reference electrode and measuring electrode when conductive liquid creates a connection.
Coarse and fine adjustment allow the response sensitivity to be matched to the conductivity of the liquid.
The device can work with relay self-hold, Min and Max switching points, or as a dual limit detector with two separate outputs.
Line break monitoring with fault relay is available when used with level or measuring probes with integrated LBM module.
The 22.5 mm wide modular housing is designed for installation in control cabinets or suitable protective enclosures.
