The Temposonics from MTS Sensor Technologie are absolute, non-contact M-Series position sensors approved for operation in safety-related applications. The sensors meet the requirements of Safety Integrity Level 2 (SIL2) to EN 61508 and therewith also the requirements of performance level d to EN 13849-1. This means the position measurement systems are approved for safety functions on mobile and stationary machines. Measuring lengths from 50mm to 2,500mm are available. In the sensor head, signals are checked and changes are detected immediately. The transducer transmits the position value to the control system only after the diagnostic test. In this way, these sensors provide a Safe Failure Fraction (SFF) of 95% at a Hardware Fault Tolerance (HFT) of 0. They are designed for a high-demand mode of operation. Due to the SIL2 classifi cation of the sensor, this corresponds to an average probability of failure (PFH) in a range from 10-7 to < 10-6 per hour.