Pneumatic extend versions of our probes, which extend when air pressure is applied. They automatically retract when no air pressure, to remove them out the way on production lines etc.
Spring versions of our probes naturally Extend, pushing the probes constantly to the surface. These are designed for manual Gauging etc
Vacuum Retract versions of our probes, which retract when a vacuum is applied. When a Vacuum is applied, they retract to remove them out the way on production lines etc.