- Crydom, Inc., a Custom Sensors & Technologies company with global operations, is an expert in Solid State Relay and Controls Technology. Crydom manufactures and commercializes two of the most preferred brands of Solid State Relay around the world; Crydom and Crouzet. Crydom offers a wide variety of off-the-shelf Solid State Relays and Contactors, I/O Modules & mounting boards, Controls and Power Modules, and specializes in custom designed solid state switching solutions for any application. At Crydom, technology and innovation combine to exceed our Customer's most demanding performance requirements.