CM3-Ex Explosion Proof Stainless Steel Safety InterlockIDEM’s CM3-Ex Explosion Proof Non Contact Switches are manufactured in Stainless Steel 316 are designed to interlock hinged, sliding or removal guard doors or hatches. All electrical switching contacts are fully encapsulated within the switch and have a Stainless Steel 316 back plate to prevent tampering with the internal components.The CM-Ex Range is designed with highly reliable power reed ..