Monitoring bulk materials

May 2013 Flow Measurement & Control

The FlowJam microwave motion detector from SWR works without contact and can be used to monitor the flow of a variety of bulk solids. The dielectric constant of the material is not important. The sensor monitors material flow rates of 10 cm/s or more. Detection is based on the Doppler effect and is independent of the direction of flow. Material flow in pipes, shafts and free-fall sections or at transfer points is indicated by two switching states of the output relay. Other applications include conveyor belts, material feeding and volumetric dosing systems. The device has been continuously adapted to different processes with a wide range of requirements.

All members of the product family can be equipped with an optional process adaptor that allows operation at temperatures up to 200°C and pressures up to 20 bar. The adaptor is also approved for installation in Ex Zones 20/22. A ceramic fitting permits insulation against very hot areas such as cyclones. The key advantage of the FlowJam is its complete insensitivity to dirt. It easily detects material aggregations, which are very common in bulk transport processes. Monitoring the solids flow through non-metallic materials such as glass, PVC and ceramics is a further option.

For more information contact Mike Andrews, OEN Enterprises, +27 (0)11 675 4447, [email protected], www.oenenterprises.co.za

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