Touchless Variable Gap Sensor

16 February 2016

Piher Sensors and Controls S.A., a Meggitt company, has developed a custom sensor designed for rotating shafts or assemblies operating in harsh operating conditions, such as boom loaders, skid-steers, buckets and hitch arms. The company’s new two-piece magnetic Hall effect variable gap sensor is designed to maintain stable electrical output and specified linearity on mobile shafts, despite radial and axial movement.

Piher said the sensor is immune to typical radial and axial play on mobile shafts where significant misalignment often results in poor operational performance and increased maintenance. The play resistance performance is achieved by means of a circular arc magnet — where 360º rotation angle is unnecessary — that is attached to rotating shafts or assemblies in off-road or marine applications.

The sensors are rated to more than 50 million cycles with a stable electrical output. The specified linearity is maintained between both sensor packages, despite any radial and axial play such as +/-1.5 to +/-7 mm (and upwards), the company said.

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