Protect your life safety equipment with the Theft Stopper®
Protect your life safety equipment with the Theft Stopper®
Theft Stopper® - Installation Video
Theft Stopper® - Installation Video

Theft Stopper ®

Protect Life Safety Equipment from Theft and Misuse

If you are looking for a way to protect Fire Extinguishers, AED’s and Evacuation Chairs from theft and unwanted use, this sturdy, self-contained alarm is the answer. This extinguisher stopper has proven highly effective in helping prevent theft, misuse or vandalism of fire extinguishers and other important devices. The Theft Stopper leaves the protected devices accessible for emergencies and does not interfere with use in any way. This extinguisher stopper is available in a wireless model to allow for remote monitoring with an STI receiver in order to protect vital life safety equipment from a distance.

New product features! – Space for optional language label for multi-lingual warning.


Key Features

5 Models Available



Theft Stopper®
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Evacuation Chair Stopper ® with Key Switch
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Extended Lead Times

Wireless Theft Stopper®
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Extended Lead Times

Wireless Theft Stopper® with 4-Channel Voice Receiver
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Discontinued (EOL)

Wireless Theft Stopper® with 8-Channel Receiver
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North Myrtle Beach Public Safety

As a tourist resort area, we have kids who mess with fire extinguishers during spring break and graduation months. Fortunately, STI Fire Extinguisher Theft Stoppers are controlling it.

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Mini Theft Stopper ®
This ingenious device protects both freestanding or cabinet-mounted fire extinguishers and other equipment.
FeaturesTheft Stopper ® Features
Theft Stopper ® design


  • It has proved highly effective in helping prevent theft, misuse or vandalism of fire extinguishers, AEDs, Evacuation Chairs, etc.
  • Does not interfere with use of protected devices.
  • With a wireless model, when an extinguisher or protected device is moved from its original position, it sends a wireless signal to an STI receiver.
  • Highly visible ‘STOP’ sign design discourages wrongful use or theft of protected device.
  • Add warning in second language with provided labels (21 languages).
Theft Stopper ® construction


  • Compact design (136mm dia x 50mm deep) mounts easily next to the protected item.
  • Polycarbonate is UV-stabilised.
  • Self-contained device, tamper-proof and sturdy.
Theft Stopper ® installation


  • The device is easy to install and a deactivation cable is supplied for ease of servicing the protected item.
  • Supplied complete with an operating cable kit, allowing the connection around the protected item.
Theft Stopper ® electronics


  • Sounds a powerful 95/105 dB (at 1 metre) warning alarm when activated (95dB low volume setting if desired).
  • Powered by a 9 VDC battery. 12-24 or wireless option is available on this model.
  • Operates up to 300 m (line of sight), 433 MHz, 95/105 dB alarm. (Wireless models)
  • Sensors have supervised battery and signal reception.(Wireless Models)
Theft Stopper ® options


  • Protect and monitor extinguishers, AEDs, Evacuation Chairs, etc.
  • Remote wireless monitoring alerts you to any vandalism or authorised use in the event of an emergency.
  • Works with the STI receiver which provides a visual and audible indication of tampering.
  • Wireless models: Sensor only, sensor with 4-Channel Receiver, sensor with 4-Channel Voice Receiver or sensor with 8-Channel Receiver.
Theft Stopper ® other information

Other Information

  • Three year guarantee against breakage of polycarbonate in normal use (one year on electro mechanical and electronic components).
  • Typical working properties of polycarbonate are -40° to 121°C (-40° to 250°F).