Wadeco have extended its range of microwave-based products with a new combination of a solids flow switch and blocked chute transmitter. The flow switch works on the Doppler principle with the emitted beam being reflected off the medium and being processed to check if the target is moving or stationary. It is ideal for detecting powders and granules in pipe lines and conveyor transported solids like rock or coal. A visual LED indication gives transmitted and received signal strength allowing for simple and accurate set-up. An independently settable time delay on the output relay allows for further refinement, making it suitable for all flow/no flow applications.
It may also be used in hopper outlets to check for blockages. When used in conjunction with the blocked chute transmitter it will prevent the stopping of a conveyor when no product is present on the belt or in the hopper. When product is detected in the hopper and the flow sensor receiver does not receive a signal, it represents a no-flow condition in the chute and the belt will be stopped.
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