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Did you know?

Can’t hear your existing doorbell in your basement, garage, shed, etc. With wireless ease extend the chime to greater distances.

Extend Chime


STI Products Work!
We have not had one false fire alarm from the pull boxes since we installed our Stopper II units.

Dennis  Clark
Director of Buildings & Grounds
Church of the Brethren Home

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About STI

False fire alarms and the theft and vandalism of protection devices can be a serious issue, compromising safety as well as costing money.

STI has been producing safety technologies that stop false fire alarms and prevent theft and vandalism for thirty years. We now market more than 1000 products worldwide. Our range includes fire alarms protection devices, stopper covers and enclosures, wire guard protectors and security protection products.

Contact us now to discuss how we can solve your specific problems.

STI Stopper II


Wire Guard Damage Stopper®
STI-9729 & STI-9730

    • Wire guards protect sensitive cameras
      against vandalism
    • Constructed of tough, 9-gauge steel wire
    • Two sizes available
    • Quick and easy to install
    • Backed by a three year guarantee against
      breakage in normal use

    • Find out more

Help Stop

Exit Stopper® Multifunction Door Alarm

    • Helps stop unauthorized exits and entries
      of fire or emergency doors
    • Helps increase workplace security
    • Alerts 95/105 dB alarm if protected door
      is opened
    • Can help stop theft
    • For indoor use only
    • Wireless models available

    • Find out more

2 Ways to Keep
Devices Cool

Protective Cabinets with AC
STI-7550AC & STI-7560AC

    • AC cabinets protect sensitive electronic
      equipment from high temperatures
    • Constructed of tough polycarbonate
      or metal
    • Helps alleviate temperature concerns
    • AC has a low ambient operation package
      to help prevent it from freezing

      protect your equipment

Products Winner

Universal Stopper®

    • Cover protects against false fire alarms
    • Helps save possible municiple fees, distruption,
      lost revenue, loss of protectivity from
      employees and/or staff members,
      damage, and replacement fees
    • Sized to fit most pull stations
    • High strength continuous hinge
    • UL/cUL Listed, waterproof 3RX

    • Find out more