Microwave Sensors

Microwave technology, sometimes referred to as radar technology is based on the Doppler Effect. Radar sensors continuously emit microwaves of a defined frequency in the detection area of the sensor, these microwaves are reflected back to the sensor by objects in the detection area.

If the object is static, then the frequency of the reflected microwave is the same as the emitted one and no detection is registered.

Once movement occurs in the detection field, the reflected microwaves change frequency, causing the sensor to detect.

This technology can distinguish between an approaching movement (higher frequency) and a departing movement (lower frequency), allowing the sensor to only open an automatic door in the approach direction.

Illustrated detection area of a HR-Robus sensor opening an industrial high speed door.