The round design with simple, single-hole assembly allows the installation of the command switches directly at the scanning points. Exact adjustment is permitted by means of the precision metric thread. The limit switches EGT with inert gas contact (reed contact) can be operated up to a water column pressure of 30 meters. The limit switches EGZ are the only single hole fixing limit switches to have a safety switching element. The switching element is Snap-action switching contact, 1 NC contact and 1 NO contact.