Door status sensing The magnetic door status detectors operate by means of a reed switch which is activated by a magnetic field. Main features: Sensor fitted inside the frame.Magnet on the door leaf. If the door is closed, the magnet acts on the contact (closed contact).Suitable for mortise installation in aluminium and wood doors and windows.* We recommend downloading the technical data sheet below to see all the options. Downloads 10382U-6_Technical_document_1_TESA.pdf (.pdf, 54 kB) Close Power supplyPower supply for electrical supply TransformerElectric transformer Fire prevention magnetic door holderElectromagnetic door holders for fire rated doors.