STI-1155NR Stopper Ii Horn Space Guard Cover

Product Description

The Safety Technology International STI-1155NR is a Stopper II protective cover assembly with an integrated horn and space guard panel, designed to deter unauthorized use of emergency exit devices and alarm pull stations. The unit combines a hinged polycarbonate cover with an audible horn that activates when the cover is lifted, providing an immediate local alert before an exit or alarm device is actuated. It is suited for commercial and institutional facilities where door hardware and life-safety devices require an added layer of access control and abuse prevention. Installation is typically handled by licensed electricians or fire alarm technicians.

The STI-1155NR is intended for use over emergency exit pushbars, pull stations, and similar wall-mounted life-safety hardware in commercial buildings, schools, healthcare facilities, and industrial sites. The space guard panel helps protect the covered device from tampering, dust, and physical damage in high-traffic or harsh environments. Refer to the manufacturer datasheet for specific dimensional fitment with the target device.

Key Features

• Integrated audible horn activates upon cover lift to deter unauthorized or accidental actuation
• Space guard panel provides additional protection against tampering and environmental contaminants
• Hinged polycarbonate cover allows quick authorized access while maintaining device protection
• Sold as a single unit (each), ready for direct installation over compatible exit or alarm hardware
• Designed for commercial, institutional, and industrial life-safety applications

Compatibility

Designed as an OEM-style protective cover for wall-mounted emergency exit devices and fire alarm pull stations in commercial life-safety installations. Consult the manufacturer datasheet for specific device fitment dimensions.

Installation Notes

Installation should be performed by a licensed electrician or qualified fire alarm technician in accordance with NFPA 72 and applicable local codes. Disconnect power to any connected alarm circuit before mounting or wiring the horn component. Verify that the cover dimensions are compatible with the underlying device before securing the assembly to the wall. Do not obstruct the emergency device in any way that would impair its intended life-safety function.