The FlowJam Plus sends microwaves into the pipeline in which the material flows. This may be a freefall pipeline or a pneumatic transport system.
The microwave signals are reflected by the moving solid particles. A shift in the Doppler frequency between the emitted and received signals means that the material is moving, in other words “Flow”. If this Doppler shift does not take place, there is no material movement and the sensor indicates “NoFlow”.
If this state occurs, the FlowJam Plus can detect on the basis of clear characteristic values from the reflection signal whether a blockage has formed from below or the material supply has been interrupted from above. This switching condition is output by a second relay.