George Risk Industries S180-12-B 3/4-Inch Steel Door SPST Switch

Add door-status switching to a physical-security circuit with a 3/4 inch SPST switch specified for steel doors. The George Risk Industries S180-12-B supplies a single-pole, single-throw switching arrangement for monitoring a door condition through an alarm or access-control system. Its compact 3/4 inch designation makes it a focused choice when the door and associated hardware require that switch size. Use the switch where a security panel, controller, or alarm input needs a change-of-state signal associated with a steel door. SPST operation provides one switched circuit, making it suitable for applications that require a straightforward door-status connection rather than multiple independent switching paths. Match the switch configuration to the input logic, wiring method, and mechanical placement required by the security system. Within steel-door switching applications, this version is defined by its 3/4 inch format and SPST circuit configuration. Those two details matter when replacing an existing door switch or selecting hardware for a new monitored opening: the physical size must suit the door installation, while the circuit type must match the connected alarm or access-control input. S180-12-B is intended for physical-security door monitoring rather than general-purpose building control.