There are 4 main types of position sensing devices for cylinders (applies to both pneumatic and hydraulic):
- Tie rod mounted limit switches that are actuated by a magnetic piston.
- End-of-stroke proximity switches that are actuated by the cylinder cushion boss.
- Linear displacement transducer constructed as a probe inside the cylinder rod.
- Servo-type positioner for an air cylinder operating by force balance.
Tie-rod mount limit switches that are adjustable throughout the cylinder stroke length are commonly available on all pneumatic cylinders.
Please contact Air Specialists Worldwide for more specifics around pneumatic cylinders and proper positioning.