Siemens
Temperature-monitoring relays with more functions
This company has transformed the temperature-monitoring relays from its Sirius portfolio. The new Series 3RS2 devices (photo) are available in analog and digital versions. They use sensors to measure the temperature in industrial control cabinets, of engine, bearing and transmission oils, or cooling liquids, preventing plant malfunctions or damage that can result when exceeding or dropping below certain limit values. These relays can also monitor heating, air-conditioning, and ventilation systems (HVAC), solar collectors, heat pumps and hot-water supply systems. The devices in the new Sirius 3RS2 series are approved for safety applications up to SIL 1 / PL c, for use in industrial furnaces, as well as for monitoring burners and ATEX applications. Compared to predecessor models, they feature expanded functionalities, a narrower design and easier operability. — Siemens Smart Infrastructure, Zug, Switzerland