Point level detection with microwave barriers

The microwave barrier functions like a light barrier: when the medium gets in the way of the microwave beam between the transmitter and the receiver, the signal is attenuated. This signal attenuation is detected by the receiver and converted into a switching signal.
In addition, microwaves are able to penetrate non-conductive materials. This means: with containers made of plastic or glass it is possible to measure right through the container walls.
Another useful application is object monitoring, e.g. detecting the position of trucks that are being loaded, or preventing crane collisions.

The advantages

Point level detection with microwave barriers operates contactlessly and is not affected by soiling – both in solids and in liquids. This ensures wear and maintenance free operation.

Applications in liquids

Microwave barriers are particularly suitable for measurement in plastic or glass vessels because no opening is required for mounting. The measurement can be carried out directly through the vessel wall.

Applications in bulk solids

The main application area of the microwave barrier is the level detection of bulk solids. The non-contact measuring principle is particularly suitable for harsh application conditions in mineral ore mining, coal or ore dressing.

Applications for object monitoring

Similar to a light barrier, the microwave barrier can be also used for object monitoring. Since microwaves are not influenced by dust, rain or fog and react virtually unaffected to soiling, they are the ideal solution for harsh operating conditions. Typical applications are loading of trucks in the quarry or collision protection. Due to the sensitivity of the receiver, an effective radius of more than 100 m can be reached.