Now widely used both indoors and outdoors in schools, hospitals, sports arenas, libraries—public buildings of almost every kind around the world
With proven protection like this, why risk costly, interruptive and sometimes deadly false fire alarms? The STI Stopper (called Stopper® II in the U.S.A. or Mini Stopper® II for a smaller version) was invented by Jack Taylor, a former member of the RAF, who now serves as Chairman of the Board of Safety Technology International, Inc., which he founded after immigrating to the United States. Fire Officials across the globe have suggested, recommended and in some cases even mandated its use to dramatically reduce and often eliminate false fire alarms.

STI Stopper Device, world's #1 fighter of false fire alarms for more than 25 years.
Typical comments made by users and fire officials are:
"We were advised by the Fire Brigade that we had generated some 85 nuisance calls in a fairly short time period due to our client group hitting the break glass call points, so we had to find some way of deterring them. We purchased the Stoppers with the built in alarms and since installing them in one particular area we've only had half a dozen calls. I've got nothing but compliments for the Stopper. It has certainly proved excellent value for money."
Chris Field, estates manager, Ticehurst House Hospital, United Kingdom
"We have specified the Stopper based on the success of the units in the USA reported by National Amusements, owners of Showcase Cinemas, in preventing the malicious use of break glass call points, especially in the unstaffed auditorium. The units are now being installed in a number of cinemas throughout the UK."
Ian Mawditt, electrical design engineer, Couch Perry & Wilkes Partnership, United Kingdom
"We have one school in the area in which the problem of false fire alarms was horrendous. We installed the Stopper thinking then that it perhaps wouldn't overcome the vandal element but we have been really amazed by the results. It has been a huge success - since installing them I don't think we've had one false alarm."
Education Department, Barnsley Metropolitan Borough Council, United Kingdom
"We had experienced a high incidence of students breaking call points and falsely setting off the fire alarms, particularly on Friday and Saturday nights when a little too much drink had been consumed. This inevitably led to false call outs for the fire brigade, which became a real nuisance. Since we installed the Stoppers from STI, we have only had one incident, compared with four or five in the last term prior to installing them."
Sarah Jons, residence manager, London School of Economics & Political Science, UK
"We had an intermittent problem with pupils activating the break glass call points in our automatic fire systems. Each alarm led to attendance by the local fire brigade but also led to considerable inconvenience, as all of the buildings in the school complex had to be evacuated every time an alarm was given. Since Derbyshire County Council Technical Services Department installed the Stoppers, not a single false fire alarm has been recorded."
Sue Kettle, Buxton Community School, UK
"We require an STI Stopper II cover on all manual pull stations that are installed in our area. Stopper II is the best thing that has ever happened to fire protection!"
Juan Ruiz, fire marshal, Pharr Fire Department
"Our community has advocated the use of STI Stopper II covers over manual pull stations for a number of years. They have been successful in stopping malicious false fire alarms."
Mark Tetreault, fire marshal, Durham Fire Department
How It Works:
The device consists of a clear, super tough, tamperproof polycarbonate shield that fits over a manual pull station, call point or similar unit to be protected. When lifted to gain access to the actual alarm, it sounds a piercing warning horn. Immediate attention is drawn to the area, and a prankster will either run or be caught. IT DOES NOT RESTRICT USE OF THE ALARM IN ANY WAY. The device is available in red, yellow, blue or green and with or without the pre-alarm.