Research and production company Relsib, LLC

NPK Relsib is one of the main Russian manufacturers of autonomous recorders (loggers), accurate portable digital meters, microclimate control devices, small-size thermal converters, overtemperature protection devices (thermal relays, thermal switches), timers and time relays, inexpensive temperature controllers for various applications. The company produces a number of components for fire alarm and fire extinguishing systems. A distinctive feature of the company's products is its modern level, high consumer qualities and low cost.

The main development directions for the coming years: microclimate control devices, including devices for pharmaceuticals and medicine, housing and communal services and social facilities, medical devices for home diagnostics, devices for the "Smart Home". All new products are aimed at both the domestic and foreign markets.