Latest & Greatest from STI

Check out our full line of products

Did you know?

Stopper II has been helping stop false fire alarms for over 30 years.

Stopper II


STI Products Work!
Malicious activation of manual pull stations was a problem at our local high school until we installed the STI Stopper II. False fire alarms are no longer a problem there.

Peter A. Raiskio
Deputy Chief
Yarmouth Fire Dept.

more testimonials
submit your own

eNews Sign-Up
Provide us your email and get our bi-monthly enewsletter.

  Fire Products Theft Vandalism polycarb covers wire guards buttons switches homework products  
  Fire Products Alarms & Chimes Polycarbonate Covers Wire Guards Buttons and Switches Home & Work Products  

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