The industry's most complete line of contact and non-contact products. GE Security Industrial safety interlock switches are used to detect the opening of guards-including professional doors, gates and/or removable covers-that prevent access to dangerous parts of a machine, and to help deter tampering with the guards or the internal machine controls. As with all GE Security Industrial 300-BT products, the safety interlock switches are in full compliance with the most current and required standards. These include IMQ, CE, VDE, UL, CSA, IEC, EN and Semi S2 standards.