STI 1200A Stopper II with 4" Deep Enclosed Back Box, Fire Label

Stop costly disruptions and protect life-safety devices with the Safety Technology International STI 1200A Stopper II protective cover. Designed to block accidental or malicious activation of fire pull stations while allowing legitimate alarms to operate freely, this durable cover reduces false alarms and the operational costs and downtime they cause. The clear polycarbonate housing delivers visible protection without obstructing use, while the integrated warning horn immediately notifies nearby staff whenever the cover is lifted, improving situational awareness for security and monitoring teams.

Built for real-world conditions, the Stopper II includes a 4" deep enclosed back box, is NEMA 3R rated for washdown and outdoor exposure, and is UL Listed and ADA compliant — making it suitable for schools, hospitals, nursing homes, retail and other facilities that require robust fire alarm protection. The surface-mount form factor installs easily over standard pull stations and supports facility security and surveillance strategies by preventing tampering and false activations.

Specify the STI 1200A to strengthen your fire alarm protection and streamline monitoring. Contact your supplier or add to your safety plan today.

• Prevents costly false fire alarms while preserving immediate, legitimate activation
• Clear, impact-resistant polycarbonate resists vandalism and harsh environments for long service life
• Built-in audible warning horn draws instant local attention when cover is lifted
• 4" deep enclosed back box with NEMA 3R rating and UL Listing for dependable protection indoors or outdoors
• ADA-compliant, surface-mount design fits standard pull stations for schools, hospitals, hotels and commercial sites