Analog monitoring relay for level and resistance monitoring from 2 to 200 kOhm. Exceeding and falling below the supply voltage AC/DC 24 V DC and AC 50 to 60 Hz without galvanic isolation to the measuring circuit. 2-point or 1-point control with a trigger delay of 0.5 to 10 seconds. 1 changeover contact with spring-loaded technology. The analog adjustable level monitoring relay SIRIUS 3UG4 is used for monitoring the level of conductive liquids to protect against overflow, dry running, or leakage. Worldwide use is ensured by a wide voltage supply and international certifications. Device replacement is possible without rewiring thanks to removable terminals. It can be flexibly adapted to different conductive liquids by analog adjustment of sensitivity. Fill or drain function is selectable. The adjustable trigger delay time allows for compensation of wave movements. Other resistance sensors, such as suitable photoresistors, temperature sensors, or resistance-based position transducers, can also be connected. In addition to screw connection technology, the devices are also available with spring-loaded connections for quick, maintenance-free, and vibration-resistant connections. As accessories, individually cuttable 2- and 3-pole wire electrodes for easy top/bottom mounting, as well as plate electrodes for side installation for larger fill heights and minimal space requirements, are available. Additional accessories, such as device identification labels, insertion tabs, and cover caps, are uniform for all relays. SIRIUS relays - a program for all cases.