Real alternative for tricky filling level queries

The first steps in „radio detecting and ranging“ technology can be dated back to 1888. It was at this time that the German physicist Heinrich Rudolph Hertz first experimentally demonstrated the existence of electromagnetic waves, the existence of which had been predicted twenty years earlier by his English colleague James Clerc Maxwell. He also penned the theory of light, which correctly states that light also consists of electromagnetic waves. Christian Hülsmeyer, who applied for a patent for the radar in 1904 under the name Telemobiloskop, had previously discovered that such waves are reflected by metallic surfaces, making his invention from the early twentieth century the first solution for time-of-flight measurement.

 

The new FR900020 radar sensor for filling level detection from ipf electronic is based on these principles and has two main advantages over other systems. It works contactlessly like an ultrasonic sensor, but with a narrow aperture angle and a long range of up to ten meters and is as precise as a sensor with a guided microwave. In addition, the functional principle offers a real alternative to optical sensors or ultrasonic sensors, particularly in ambient conditions such as high temperatures, gas or steam, overpressure, underpressure or vacuum, as well as dust and interfering ambient light. The radar sensor offers clear advantages compared to other sensor concepts, for example when monitoring the filling level of media on which foam can form. Furthermore, the radar sensor also enables detection through a plastic lid, which serves as a container cover or protective window, for example.

 

The integrated IO-Link interface, which is routed via the M12 plug connection, makes it easy to adapt the sensor to an application. The cylindrical, 62mm long housing is equipped with a G1/2“ thread for integration into a wide range of processes. (rt)

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