- Larger sizes and surface‑mounted pull stations accommodated with STI‑3100 conduit spacer
- Weather models have closed cell gaskets
- UL Listed to U.S. and Canadian safety standards
- Typical working properties of polycarbonate are ‑40 Degrees to 250 Degrees F (‑40 Degrees to 121 Degrees C)
- Power source is a 9V DC alkaline battery included on standard Stopper II
- Remote powered unit available
This protective cover has been helping to stop false fire alarms around the world for more than 40 years, without restricting legitimate alarms. All models offer excellent protection against physical damage (both accidental and intentional) and several against severe environments both inside and out. It is ideal for schools, colleges, hospitals, nursing homes, stores, hotels, and public buildings of almost every kind where there is a threat of false alarms.
How it Works
Stopper II consists of a clear, tamperproof, tough polycarbonate shield and frame, but the line includes models with the option of a piezo horn, spacer, Form “C” dry relay contact, and gaskets. The cover accommodates most manual pull stations. When the Stopper II with horn is lifted to gain access to the protected alarm, a piercing self‑contained 95 or 105 dB warning horn (at one foot) sounds. Immediate attention is drawn to the area and a prankster will either run or be caught. The cover is connected to the frame by a cable. When the cover is lifted, it drops off the frame and a horn will sound (models with horn) until the cover is snapped back onto the frame or for the life of the battery.
Approvals and Ratings
- UL/cUL Listed No. S2466
- For fire alarm applications, UL38 requires outdoor listed stations for outdoor use
- State of California (obtain local fire marshal approval)
- MEA 49‑00‑E (STI‑1200)
- Flush models ADA Compliant
- Surface models ADA Compliant for operation (UL Certified No. S2466)
- Weather Stopper versions designed to meet the requirements of IP54
- The indoor/outdoor rated station covers, when mounted on a smooth surface, provide a rain tight seal similar to a 3R enclosure rating