No hand free? No problem.

The RT210900 is a contactless radar button for automatic doors that combines convenience and hygiene. It reacts reliably to a hand movement in the direction of the sensor and therefore eliminates the need for direct physical contact with a mechanical diffuse reflection sensor, which is particularly advantageous in heavily frequented or sensitive areas.

The sensor works with radar technology in the 24 GHz range and specifically recognizes hand movements in front of the front surface. The detection range can be set between around 10 and 60 cm so that the diffuse reflection sensor triggers exactly where it should or where it is intuitive for the user. Typical applications are automatic door systems in entrance areas, in logistics, in the healthcare sector or wherever doors need to be operated hygienically and without contact.

They are triggered by a simple hand movement towards the sensor, supported by a clearly visible LED display that signals the switching state. The range, output mode and color logic of the LED can be adapted to the respective application via potentiometers and DIP switches.

For example, it is possible to set whether the LED lights up on detection or at rest, giving the user clear visual feedback. The RT210900 is operated with 12-24V AC or 12-24V DC and has a potential-free relay changeover contact with a switching current of up to 1A. The power consumption is around 1.5W, allowing the sensor to be easily integrated into existing door control systems. With a compact housing of around 80 x 80 x 21mm made of robust PC plastic and a degree of protection of IP54, it is also suitable for use in demanding environments.

Installation in existing flush-mounted boxes is simple, and a suitable housing is available as an accessory for surface mounting (AR000008). Thanks to the silicone seal and the sophisticated front panel, the diffuse reflection sensor is visually unobtrusive and blends harmoniously into door and wall surfaces. In everyday use, the RT210900 makes door management noticeably more convenient and at the same time safer - a small component with a big impact in everyday life.