Sensors get an angle on displacement

Edited by the Engineeringtalk editorial team Mar 27, 2006

The SM60 series of inductive displacement sensors is designed for measurement of angles.

Part of the Schreiber Messtechnik range of inductive displacement sensors recently introduced to the UK by Techni Measure, is the SM60 series for measurement of angles.

This range of inductive angle transducers offers measurements from 30 to 90 degrees full-scale range.

Most types are available with built in electronics requiring a simple DC voltage supply, with the rugged SM62 model having either voltage or 4-20mA output signals.

Standard accuracy is specified at less than 0.5% full scale, but more accurate options are available if required.

The operation principle of the inductive sensors, involves a nickel iron core rotor moving through two coils of a differential choke.

The position of the rotor leads to an inductance variation in the coils and either internal or external electronics converts this variation into a signal proportional to the angle of rotation.

Units without built in electronics require external conditioning which can be supplied in either single channel rail mount modules or multichannel modules, which contain the oscillator and demodulation required for this type of sensor.

These transducers complement the existing Techni Measure range of low cost potentiometers that can also be used for angle measurements, but the SM60 series offer longer life (no contact wiper), greater accuracy and environmental protection to IP65.