Analog monitoring relay for level monitoring and resistance monitoring from 2 to 200 kOhm. Over- and under-threshold detection for AC/DC 24 to 240 V and AC 50 to 60 Hz. It offers 2-point or 1-point control with a trigger delay of 0.5 to 10 seconds and a changeover contact. The analog adjustable level monitoring relay SIRIUS 3UG4 is designed for monitoring the level of conductive liquids and protects against overflow, dry running, or leakage. It is suitable for worldwide use due to its wide voltage supply and international certifications. Device replacement is possible without rewiring thanks to removable terminals. Sensitivity can be flexibly adjusted for different conductive liquids. A fill or drain function can be selected. The adjustable trigger delay time allows for compensation of wave movements. Other resistance sensors, such as suitable photoresistors, temperature sensors, and resistance-based position sensors, can also be connected. In addition to screw connection technology, the devices are also available with spring-loaded terminals for a quick, maintenance-free, and vibration-resistant connection. As accessories, individually cuttable 2- and 3-pole wire electrodes for easy top/bottom mounting and flat 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.