Inductive position sensing principle of operation.
Uses Gill patented induction
technology, with a series of
coils measuring the position
of the metallic ‘activator’
Metallic target ‘activator’,
typically made from mild
steel is mounted to, or
machined into, the moving
part of the application.
Inductive position sensing is a three step process…
Step 1 – Generate
The coil generates a magnetic field which
penetrates the activator, causing it to produce
its own opposite field.
Step 2 – Respond
The coil stops generating its magnetic field
and measures the activator’s induced field.
Step 3 – Compare
This measurement is compared across the series
of coils to calculate absolute measurement
of the activator’s position.
Advantages of induction technology
Non-contact. Excellent long-term reliability in harsh environments
Fully sealed and submersible sensor designs
No output drift with temperature change
Suitable for linear, angular and non-uniform measurement
Unaffected by the presence of permanent magnets
Wide temperature operating range
No requirement for mechanical linkages