HBSR is a level switch for the detection of NH3 and Brine refrigerants.Typically it is installed in/on the refrigerant vessels, pump separators, economisers or heat exchanger.The sensor is specially built to resist high pressure and low temperatures.Product Features:Proven sensor technology for simple transsistor output PNP/NPN and NO/NC contact function. The NO/NC term refers to the state of the contact in "dry" condition, when not influenced by the liquid.Designed for the industrial refrigeration industry - max pressure 100 bar.Clear indication with LED when refrigerant is detected.Split design which makes it easy to install and make diagnostic on.