STI 1130 Stopper II with Horn and Clear Spacer, Fire Label

Keep fire alarm pull stations protected and reduce nuisance alarms with the STI 1130 Stopper II protective cover from Safety Technology International. Engineered for facility managers, this surface-mount protective cover combines UV‑stabilized polycarbonate durability with a clear spacer that preserves visibility while preventing accidental or malicious activations. When the cover is lifted, a self-contained piercing 95/105 dB warning horn sounds (at one foot), immediately drawing attention to the area and deterring tampering without restricting legitimate alarm use.

The Stopper II (STI-1130) ships with a 9V DC battery and is UL/cUL Listed and ADA-compliant, making it ideal for commercial, educational, medical and public buildings where code compliance and reliable monitoring matter. Its bright red finish and low-profile form factor integrate easily with existing fire alarm, security and surveillance systems to improve response times and reduce false-alarm service calls.

Choose the STI 1130 to lower maintenance costs, strengthen on-site security, and support continuous monitoring and incident response. Order the Stopper II protective cover today to bolster your facility’s fire alarm protection.

• Prevents false fire alarms and reduces costly operational disruptions
• Audible deterrent: self-contained 95/105 dB horn activates when the hood is lifted
• Durable UV-stabilized polycarbonate with clear spacer preserves visibility without impeding use
• UL/cUL Listed and ADA-compliant for code-sensitive commercial and institutional installs
• Includes 9V DC battery; flush surface-mount design simplifies retrofit and maintenance
• Trusted STI Stopper II solution proven to protect pull stations and strengthen on-site security