TFS-35 Thermal flow sensors

The TFS-35 thermal flow sensor is intended for limit flow rate monitoring of liquids and for monitoring their temperature when installed in a pipe. It can be used for both electrically conductive and non-conductive media and may be installed in both metal and plastic pipes. The sensor is made completely from stainless steel, on one end fitted with the sensing element (stem), on the other end a terminal with a LED status indicator, setting elements and the electrical connection.

More information available here