Analog monitoring relay for level monitoring and resistance monitoring from 2 to 200 kOhm. Exceeding and falling below thresholds at a supply voltage of AC/DC 24 V DC and AC 50 to 60 Hz without galvanic isolation to the measuring circuit. It offers a 2-point or 1-point control with a trigger delay of 0.5 to 10 seconds and a changeover contact with screw connection. This is the successor product to 3UG3501-1AC20.

The analog adjustable level monitoring relay SIRIUS 3UG4 is used for monitoring the level of conductive liquids and protects against overflow, dry running, or leakage. It is suitable for worldwide use thanks to its wide voltage supply and international certifications. Device replacement is possible without rewiring, as removable terminals are available.

The device can be flexibly adapted to different conductive liquids by analog adjusting the sensitivity. A filling or draining function can be selected. The adjustable trigger delay time allows for compensation of wave movements. Other resistance sensors can also be connected, such as suitable photoresistors, temperature sensors, or resistance-based position sensors.

In addition to screw connection technology, the devices are also available with spring-loaded connections, allowing for quick, maintenance-free, and vibration-resistant connections. Accessories include individually cuttable 2- and 3-pole wire electrodes for easy top/bottom mounting, as well as probe electrodes for side installation in larger fill heights with minimal space requirements. Additional accessories such as device labeling plates, insertion tabs, and cover caps are uniformly available for all relays. SIRIUS relays - a program for all cases.