Door/Window Contact Brennenstuhl BrematicPRO TFK868 01 IP20 wireless sensor for doors and windows

Brennenstuhl BrematicPRO TFK868 01 IP20 is a compact wireless door and window contact sensor designed to report open and closed states to compatible alarm and home automation systems operating on the 868 MHz band. With IP20 protection, the sensor is intended for indoor use and provides a discreet monitoring point for entryways and window frames. The device transmits status changes wirelessly, enabling integration into alarm panels or smart home controllers that support the protocol.

Advantages

The sensor offers a slim and unobtrusive housing suitable for mounting on doors and windows where aesthetics and space are limited. Wireless communication at 868 MHz ensures reliable short-range transmission in typical residential and office environments. Low power consumption extends battery life, reducing maintenance intervals, while simple installation and magnetic switching deliver straightforward operation without complex wiring.

Suitable for

• Monitoring interior doors and windows in homes
• Securing offices, storage rooms, and small commercial premises
• Integration with compatible 868 MHz alarm panels and smart home hubs
• Temporary or retrofit security installations where running cables is impractical

Key specifications

• Wireless frequency: 868 MHz protocol suitable for compatible alarm and automation systems
• Protection rating: IP20 (indoor use, protected from solid objects larger than 12 mm, not protected against water)
• Form factor: compact contact sensor with separate magnet for surface mounting
• Power source: battery-powered with low-power operation for extended service life
• Switch type: magnetic/open-close reed switching mechanism
• Installation: surface-mountable on door/window frames with adhesive or screws

How to use

Mount the sensor body and the magnet on opposing parts of the door or window so that they align when the door or window is closed. Follow the pairing procedure of your compatible alarm system or smart hub to enrol the device on the 868 MHz network; this typically involves placing the control panel into learning mode and activating the sensor according to the system manual. After successful pairing, test the sensor by opening and closing the door or window and verifying the status updates on the alarm panel or controller. Replace the battery when the system indicates low battery or per the maintenance schedule.

Recommendations

Install the sensor indoors, away from direct moisture or outdoor exposure, and avoid mounting near large metal surfaces or electrical equipment that could degrade wireless performance. Ensure the magnet and sensor are aligned within the manufacturer’s specified gap for reliable operation, and register the device with the intended control unit before final mounting.