Touchless variable gap sensor

Written by: Tom Austin-Morgan | Published:

Piher Sensors and Controls has introduced a custom sensor that it claims is suitable for the harshest of environments, a two-piece magnetic Hall effect variable gap sensor that maintains stable electrical output and specified linearity on mobile shafts, despite radial and axial movement.

The sensor is said to be immune to typical radial and axial play on mobile shafts where significant misalignment often results in poor operational performance and labour-intensive maintenance. The play resistance performance is achieved by means of a circular arc magnet that is attached to rotating shafts or assemblies, such as boom loaders, skid steers, buckets and hitch arms, and the electronics module to the chassis.

Over 50million cycles, stable electrical output and the specified linearity is maintained between both sensor packages, despite any radial and axial play such as ±1.5 to ±7mm respectively. It is also low-profile, yet rugged and can be custom-engineered to fit existing mechanical assemblies for industrial, off-road and marine applications.


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