Safety Technology International STI-3150


Weather Stopper without Horn with Spacer, Clear

Availability: In Stock

  • Factory New
Brand: Safety Technology International Part #: 1944 Category: Manufacturer Part #: STI-3150Secondary Part #: 20-1103 Tag:


This protective cover has been helping to stop false fire alarms around the world for more than 35 years, without restricting legitimate alarms. all models offer excellent protection against physical damage (both accidental and intentional) and several against severe environments both inside and out. It is ideal for schools, colleges, hospitals, nursing homes, stores, hotels and public buildings of almost every kind where there is a threat of false alarms.


Weight 1.2 lbs
Dimensions 7.00 × 5.00 × 5.20 in

Safety Technology International


Safety Technology International



Unit of Measurement

EA (Each)

Production Status



  • Cover is UV-stabilized.
  • Proven effective for more than two decades.
  • STI-3150 is for surface mount pull stations (flush – see STI-1250).
  • UL Listed to U.S to Canadian safety standards and NEMA 3R requirements (for standard and custom labeling).
  • Typical working properties of polycarbonate are -40™ to 250™F (-40™ to 121™C).
  • Fits virtually all manual pull stations (see Technical Data Sheet for dimensions).
  • Includes clear spacer.

STI Stopper II®

STI - Data Sheet