Safety Technology STI-1100 Stopper® II with Horn Flush Mount

This unique and patented device has been helping stop false fire alarms around the world for more than 25 years, without restricting legitimate alarms. Ideal for schools, hospitals, nursing homes, stores, hotels and public buildings of almost every kind.

Stopper II consists of a clear, tamperproof, super tough polycarbonate shield and frame that fits over manual pull stations. When lifted to gain access to the actual alarm, it sounds a piercing 95 dB or 105 dB warning horn. 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 hangs off of the frame and the horn will sound until the cover is snapped back onto the frame (or for the life of the battery).

STI-6531 2" Conduit Spacer for Mini Stopper® - Clear

Clear riser for use with Mini Stopper to provide additional 2" of depth for surface mounted pull stations or push buttons. Has conduit knock-outs for mounting around exposed conduit.

STI-1130 Stopper II with Horn and Spacer: Clear Spacer

This unique and patented device has been helping stop false fire alarms around the world for more than 25 years, without restricting legitimate alarms. Ideal for schools, hospitals, nursing homes, stores, hotels and public buildings of almost every kind.

Stopper II with horn and spacer consis…

STI-1130RC Stopper II with Horn and Relay: Clear Spacer

This unique and patented device has been helping stop false fire alarms around the world for more than 25 years, without restricting legitimate alarms. Ideal for schools, hospitals, nursing homes, stores, hotels and public buildings of almost every kind.

Stopper II with horn and spacer consis…

STI-1150 Stopper II with Horn Flush Mount: Indoor/Outdoor Rated

This unique and patented device has been helping stop false fire alarms around the world for more than 20 years, without restricting legitimate alarms. Ideal for schools, hospitals, nursing homes, stores, hotels and public buildings of almost every kind.

Stopper II consists of a clear, tamper…

STI-1200 Stopper II without Horn: Flush Mount

This unique and patented device has been helping stop false fire alarms around the world for more than 20 years, without restricting legitimate alarms.

Stopper II consists of a clear, tamperproof, super tough polycarbonate shield and frame that fits over manual pull stations. The cover is con…

STI-1210A Horn/Strobe Damage Stopper and Enclosed Backbox, 4" Deep

This virtually indestructible cover (slotted for horn/strobe unit alarms) is designed to stop vandalism and accidental damage for flush mounted units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use. Slots in the STI 1210A a…

STI-1210B Horn/Strobe Damage Stopper and Enclosed Backbox with Double-Gang Outlet Box

This virtually indestructible cover (slotted for horn/strobe unit alarms) is designed to stop vandalism and accidental damage for flush mounted units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use. Slots in the STI 1210B a…

STI-1210C Horn/Strobe Damage Stopper and Open Backbox with External Mounting Tabs

This virtually indestructible cover (slotted for horn/strobe unit alarms) is designed to stop vandalism and accidental damage for flush mounted units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use. Slots in the STI 1210C a…

STI-1210D Horn/Strobe Damage Stopper and Open Backbox with Conduit Knockout

This virtually indestructible cover (slotted for horn/strobe unit alarms) is designed to stop vandalism and accidental damage for surface mounted units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use. Slots in the STI 1210D…

STI-1210E Horn/Strobe Damage Stopper and Open Backbox for Flush Mount

This virtually indestructible cover (slotted for horn/strobe unit alarms) is designed to stop vandalism and accidental damage for flush mounted units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use. Slots in the STI 1210E a…

STI-1215 Stopper Dome for Horn/Speaker/Strobe Flush Mount

This virtually indestructible cover (slotted for horn or speaker unit alarms) is designed to help stop vandalism and accidental damage for flush mount strobe/horn/speaker units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal us…

STI-1217 Stopper Dome for Horn/Speaker/Strobe with Open Backbox

This virtually indestructible cover (slotted for horn or speaker unit alarms) is designed to help stop vandalism and accidental damage for flush mount strobe/horn/speaker units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal us…

STI-1221D Strobe Damage Stopper and Open Backbox with Conduit Knockout

This virtually indestructible cover (solid for strobe unit alarms) is designed to stop vandalism and accidental damage for surface mounted units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use. Unit comes with a spacer with…

STI-1221E Strobe Damage Stopper and Open Backbox for Flush Mount

This virtually indestructible cover (solid for strobe unit alarms) is designed to stop vandalism and accidental damage for flush mounted units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use. Unit comes with open back frame…

STI-1225 Stopper Dome for Strobe Only - Flush Mount

This virtually indestructible cover (solid for strobe units only) is designed to stop vandalism and accidental damage for flush mounted units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use.…

STI-1227 Stopper Dome for Strobe Only with Open Backbox

This virtually indestructible cover (solid for strobe units only) is designed to stop vandalism and accidental damage for surface mounted units. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use.…

STI-1229 Stopper Dome for Strobe Only with Enclosed Backbox - NEMA 4X

This virtually indestructible cover is designed to stop vandalism and accidental damage to strobe units. This cover is designed to provide maximum protection in harsh conditions. Weatherproof cover is NEMA 4 and NEMA 4X Rated. Product includes an enclosed backbox. Unit incorporates an appliance moun…

STI-1229HTR Stopper

Environmental enclosure with 110 VAC heater for signaling appliance unit UL Listed to U.S. and Canadian safety standards and NEMA 4X Standards.

Now there is a way to protect your signaling device located where temperature or environmental conditions exceed the suggested operating range. This …

STI-1229HTR-HAZ Stopper Dome Heated Enclosure for Strobe Only NEMA 4X Hazardous Locations

Now there is a way to protect your signaling device located where temperature or environmental conditions exceed the suggested operating range of your strobe. Thermostatically controlled 110 VAC heater and a continuous duty fan maintain a uniform temperature in the cover when located in a cold envir…

STI-1230 Stopper II without Horn with Spacer

This unique and patented device has been helping stop false fire alarms around the world for more than 20 years, without restricting legitimate alarms.

Stopper II consists of a clear, tamperproof, super tough polycarbonate shield and frame that fits over manual pull stations. Additional model…

STI-1250 Weather Stopper without Horn Flush Mount

This tough, clear polycarbonate cover helps dramatically to extend the life and reliability of weather exposed manual pull stations, push buttons and similar devices as well as protect them in harsh indoor conditions. Using the same super tough cover as the Stopper® II device but without the war…

STI-3150 Weather Stopper without Horn with Spacer

This tough, clear polycarbonate cover helps dramatically to extend the life and reliability of weather exposed manual pull stations, push buttons and similar devices as well as protect them in harsh indoor conditions. Using the same super tough cover as the Stopper® II device but without the war…

STI-4100 Break Glass Stopper: Large

Accepted by fire marshals, this cover is designed for areas where a "break glass" cover is specified, such as unsupervised areas. It consists of a red polycarbonate cover, mounting frame, a pane of single-strength clear glass (easily replaced when broken), a glass-breaking bar and anchors for instal…

STI-6100 Break Glass Stopper: Small

For places where a "break glass" cover is specified such as unsupervised areas. Accepted by many fire marshals, these versions of the world famous STI Stopper® II are designed for areas where a "break glass" cover is specified. Each device consists of a red polycarbonate cover, mounting frame, a…

STI-6525 Mini Weather Stopper: Indoor/Outdoor Rated - Flush Mount

This unique and patented device has been helping stop false fire alarms around the world for more than 20 years, without restricting legitimate alarms.

Mini Weather Stopper is a protective cover for flush units (surface - see STI-6535). It consists of a clear, tamperproof, super tough polycar…

Safety Technology STI-6535 Mini Weather Stopper® - Indoor/Outdoor Rated - with Spacer

This unique and patented device has been helping stop false fire alarms around the world for more than 20 years, without restricting legitimate alarms.

Mini Weather Stopper is a protective cover for surface mount units (flush - see STI-6525). It consists of a clear polycarbonate shield, weather gaskets, frame and conduit spacer. Cover contains no horn. Additional models are available with a built-in warning horn that sounds when the cover is lifted to gain access to the pull station (see STI-6605).

STI-6540 Mini Stopper® II without Horn Flush Mount

This unique and patented device has been helping stop false fire alarms around the world for more than 20 years, without restricting legitimate alarms.

Mini Stopper II consists of a clear, tamperproof, super tough polycarbonate shield and frame that fits over manual pull stations. Cover conta…

STI-6545 Mini Stopper II without Horn with Spacer

This unique and patented device has been helping stop false fire alarms around the world for more than 25 years, without restricting legitimate alarms.

Mini Stopper II consists of a clear, tamperproof, super tough polycarbonate shield and frame that fits over manual pull stations. Cover conta…

STI-6605 Mini Stopper II with Horn and Spacer: Black

This unique device has been helping stop false fire alarms around the world for decades, without restricting legitimate operation of devices such as access controls, digital keypads, smaller manual pull stations, shutdown switches in computer rooms, workshops and many more.

The Mini Stopper I…

STI-6600 Mini Stopper II with Horn - Flush Mount

This unique device has been helping stop false fire alarms around the world for decades, without restricting legitimate operation of devices such as access controls, digital keypads, smaller manual pull stations, shutdown switches in computer rooms, workshops and many more.

The Mini Stopper I…

STI-1130 Stopper® II with Horn and Spacer - Clear Spacer

This unique and patented device has been helping stop false fire alarms around the world for more than 25 years, without restricting legitimate alarms. Ideal for schools, hospitals, nursing homes, stores, hotels and public buildings of almost every kind.

Stopper II with horn and spacer consists of a clear, tamperproof, super tough polycarbonate shield and frame that fits over manual pull stations and a space for mounting over exposed conduit. When lifted to gain access to the actual alarm, it sounds a piercing 95 dB or 105 dB warning horn. Immediate attention is drawn to the area and a prankster will either run or be caught.

STI-1230R Stopper® II without Horn with Spacer: Red

This unique and patented device has been helping stop false fire alarms around the world for more than 20 years, without restricting legitimate alarms.

Stopper II consists of a clear, tamperproof, super tough polycarbonate shield and frame that fits over manual pull stations. Additional models are available with a built-in warning horn that sounds when cover is lifted to gain access to the pull station (see STI 1100).

Pull station not included