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!
Since we installed Stopper II, we have had no false fire alarms.

Jeff Pepper
Oakland Manor

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

Select-Alert Alarm
Mini Controller

Helps Stop Unauthorized Use

    • Multipurpose strobe and alarm
    • Helps stop unauthorized use of devices
    • Flashing LED and alarm offers a variety of
      uses in emergency situations
    • Offers a choice of 32 distinct tones
    • Timing choices: 15, 30 or 60 seconds
      or continuous

    • Find out more

UL Listed
Wire Guards

Horn/Strobe/Speaker Damage Stopper®
STI-9705 & STI-9708

    • Guards protect against vandalism
      and accidental damage
    • UL/cUL Listed
    • Designed to protect System Sensor SpectrAlert®
      Advanced series of horn/strobe/speaker
      notification appliances
    • Constructed of tough 9-gauge steel wire
    • Available in flush or surface mount

    • Find out more

Protective Cover

Mount Directly to an Electrical Box

    • Mounts directly through product mounting
      plate to an electrical box
    • Included mounting frame eliminates the need
      to drill additional holes in the wall
    • Brother to the Bopper Stopper®
    • Hinged cover takes hard knocks in stride
      while helping to protect smaller-sized
      electrical units

    • Find out more


Wireless Driveway Monitor
with Talking Receiver

    • Sends wireless signal to voice receiver when
      a vehicle enters or leaves the driveway
    • Quick and easy to install
    • Operates up to 1000 feet (line of sight)
    • Receiver offers 10 tones/tunes and 53
      selectable words (in English or Spanish)
    • Weather resistant, battery powered
    • Will not be triggered by animals, people
      or shadows

    • Find out more