Home Stirling Cryogenics CryoZone DH Industries USA Contact About us We cool to excel News Jobs Memberships DH Industries: We Cool to Excel. DH Industries is an experienced cryogenic service provider, specialized in stand-alone cryogenerators and closed-loop cooling systems. Our two brands, Stirling Cryogenics and CryoZone, have earned a solid reputation in their respective field of expertise. They go the extra mile to fulfill their clients’ expectations and help them succeed. Website developed by: Keistoer Interactieve Media