FM 300 is an electronic system to measure and evaluate the closing force of elevator doors and machinery protection equipment. Users are manufacturing / operating companies for elevators or machinery protection equipment. The components of the system are: Sensor FM 300 - Sensor Elektronic-Box SEB2 - PC-Software PinchPilot. A set of distance parts allow different gap width. Besides the peak force the energy and the speed of the door are calculated during evaluation. For the measuring process, the sensor and the battery driven electronic box SEB 2 are needed. The electronic box is able to save up to 100 measurements. For evaluation and saving purposes the measured data has to be uploaded into a PC. The PC software PinchPilot is the useful tool for further data processing (evaluation, creating a report).