Pneumatic Probes use compressed air to activate the plunger. When compressed air is applied then the plunger shoots out of the barrel and contacts the test point. The spring inside the barrel has the function to retract the plunger to its home position after turning off the compressed air.
The Pneumatic Probes offer the ideal solution when only a few test points need to be contacted from the side or angularly. And in the case of only a few test points they also offer a cost effective solution instead of using spring-loaded probes mounted in the moving probe plate of a Test Fixture.
