Effective solutions in

Sensors can be implemented in numerous technologies which can present a bewildering choice.

The main ones are based on magnetism, electric field, piezo, acoustics, optics, and thermal effects. These can be sub-divided once again; for example within magnetism exist hall effect, inductive, magnetostriction, ....to name but a few.

The physical implementation should also be considered. Devices can be individually machined, or employ plastic mouldings; they might be designed into printed circuit boards or be constucted in silicon as a MEMS device.

All these factors can have considerable bearing on the performance and cost of the production sensor.