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Powder/Bulk Solids

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Microwave Beam Blockage Detector

December 16, 2009
This unit uses microwave energy to detect blockage of the path between a sender and receiver. The system is ideal for high reliability blocked chute detection in bulk material conveying and transfer systems, solving the costly problems of false tripping and failure to respond that can occur with traditional tilt switch types. Other major areas of application are boom collision detection, nucleonic switch replacement, and point level switching for most solid materials, including wet, dry, and bulk material. The complete system includes two functions, a sender and a receiver. The sender transmits rapid bursts of microwave energy. The matching receiver is positioned in line with the sender. If the beam path is blocked by any object or material, the receiver will not be able to detect the signal. The presence or absence of the signal at the receiver is used to switch a relay for indication or control purposes. The receiver may be mounted up to 328 ft from the sender. The sensitivity of the detector is adjustable, allowing the system to tolerate build-up or changes in material properties.
Hawk Measurement, Middleton, MA 888-429-5538 www.hawkmeasure.com