The customer had stringent requirements for the stability of components – in this case rotational speed sensors – against temperature changes.

RHEINTACHO's solution consists of two rotational speed sensors. Mechanically, it is based on the FC sensor and electronically on the FE sensor version as a 2-channel hall-difference sensor. It is suitable for detecting rotational speed and direction and can detect standstill (0Hz). The connection interface uses a common type of Deutsch-plug. The sensor's protection class is IP6K9K / IP67.

The mechanical and electronic components are capable of withstanding extreme temperature change stress. The test procedure is simple, yet demanding: 1000 change cycles between -40 and 125°C. Change time between temperature limits is 30 seconds maximum. Dwelling time at temperature limits is 40 min each. 

All tested rotational speed sensors passed the 'torture' test and were fully functional afterwards. Sensors & Instrumentation Stand C12