STI Stopper II with Horn Flush Mount STI-1100, Fire Label, Red

Lift the cover. Sound the horn.

The Stopper II STI-1100 is a red polycarbonate cover for fire alarm pull stations. Lifting it sounds a built-in horn, helping stop false alarms without restricting legitimate ones.

$157.70
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STI Stopper II with Horn Flush Mount STI-1100
Cover lifted, horn soundsSelf-contained 95/105 dB horn
Fire label, red coverUL/CUL Listed, ADA Compliant

A bumped pull station means a false alarm.

False fire alarms disrupt schools, hospitals and public buildings. A protective cover that announces tampering helps deter them.

✕
Without itAnyone can pull the alarm unnoticed, and accidental or prank activations go unchallenged.
✓
With the STI-1100Lifting the cover sounds a warning horn that draws immediate attention, while real alarms can still be activated.
What you get

Deters false alarms, not real ones

The Stopper II adds a warning layer to a pull station without restricting legitimate use.

Horn on cover lift

When the cover is lifted, the self-contained 95/105 dB warning horn sounds to draw immediate attention.

STI Stopper II with Horn Flush Mount STI-1100, Fire Label, Red
40

years proven effective

The polycarbonate cover has been proven effective for over 40 years.

Legitimate alarms still work

The cover does not restrict legitimate alarms from being activated.

Polycarbonate protection

The protective polycarbonate cover has been proven effective for over 40 years.

Battery included

A 9VDC battery is included, and the horn is self-contained.

The brand

STI

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Details

Everything you need to know.

BrandSTI
ModelSTI-1100
Product LineStopper II
Alarm TypeAudible
Sound Emission105dB
Power SourceBattery
MaterialPC
ColorRed
Height5.4"
Width5.0"
Depth5.2"
Certifications & StandardsUL/cUL FM ADA BSA
Description

STI Stopper II with Horn Flush Mount STI-1100, Fire Label, Red

The STI STI-1100 is a Stopper II with Horn Flush Mount (Fire Label, Red). It is made for fire alarm, security and facility professionals who need dependable protective cover equipment.

Key Features

  • Protective polycarbonate cover proven effective for over 40 years
  • Helps stop false fire alarms
  • When cover is lifted, horn sounds
  • Does not restrict legitimate alarms from being activated
  • Self-contained 95/105 dB warning horn
  • Includes 9VDC battery
  • Warning horn draws immediate attention
  • Flush mount
  • 3 year guarantee, 1 year on electronics
  • UL/CUL Listed, ADA Compliant

Specifications

  • Brand: STI
  • Model: STI-1100
  • Product Line: Stopper II
  • Product Model: STI-1100
  • Product Series: STI-1100
  • Product Type: Security Cover
  • Alarm Type: Audible
  • Device Supported: Fire Alarm, Pull Station, Telephone
  • Material: Polycarbonate
  • Application/Usage: Call Point, College, Hospital, Hotel, Indoor, Nursing Home, Outdoor, School
  • Color: Red
  • Color Details: Clear - Cover
  • Depth: 5.2"
  • Durability: Damage Resistant, Tamper Resistant
  • Form Factor: Surface Mount
  • Height: 5.4"
  • Product Color: Clear
  • Width: 5"
  • Power Source: Battery
  • Certifications & Standards: UL/cUL FM ADA BSA
  • Features: Flush Mount, Protective UV-stabilised polycarbonate cover, The STI-1100 deters false alarms
  • Shipping weight: 1.5 lb

Typical Uses

  • Preventing false alarms and vandalism on fire and safety devices
  • Schools, gyms, hospitals and public buildings

Please confirm that the STI-1100 matches your system, panel, mounting and finish requirements before ordering. Contact us with the model of your existing equipment if you need help checking compatibility.

Good to know: Please confirm that the STI-1100 matches your system, panel, mounting and finish requirements before ordering.

Need help with compatibility?

Looking for a manufacturer part number, compatible replacement, or quantity order? Contact Raztechs for sourcing and quote support.

Request a quote
STI Stopper II with Horn Flush Mount STI-1100, Fire Label, Red
In the box

STI STI-1100, ready to order.

  • 9VDC battery
$157.70STI-1100