This range of microwave level switches provides a simple non-contact, non-intrusive option suitable for many applications on powders and solids. An installation comprises a transmitter and a receiver mounted facing one another up to 40m apart. During operation, the transmitter emits a continuous, low-power microwave beam to the receiver, and an output relay is energised or de-energised when this beam is obstructed by the material being monitored. The switch trigger point is determined by the amount of microwave energy received. It can therefore be adjusted to cater for different products and different sensitivity settings depending upon the application. Typical applications for detecting the presence and non-presence of materials include flow and no-flow conditions, point level detection, blocked chute detection, and proximity switch detection for reversing vehicles such as quarry trucks and rail cars.
https://agg-blackbox.com/Instrumentation/Hycontrol-MICROWAVE-LEVEL-SWITCH