Thermostat Guards, Fire Station Protectors, Safety Technology International (STI), and more!

STI-6535: Mini Weather Stopper® - Indoor/Outdoor Rated - without Horn, with Spacer

$75.00 $63.75

Mini Weather Stopper® - Indoor/Outdoor Rated - without Horn, with Spacer

This unique and patented device has helped stop false fire alarms around the world for over 30 years, without restricting legitimate alarms. With a custom label the STI-6535 is also ideal for access controls, digital keypads, smaller manual pull stations, shutdown switches in computer rooms, workshops and much more.

STI-6535 is a protective cover for surface mount pull stations (flush - see STI-6525) that consists of a clear, tamperproof, super tough polycarbonate cover, weather gaskets, frame and conduit spacer. Cover contains no horn. Additional models (indoor only) are available with a built-in warning horn that sounds when the cover is lifted to gain access to the pull station (see see STI-6605).

This tough UV-stabilized cover helps extend the life and reliability of weather exposed manual pull stations and also guards against damage from dirt, grime and other harsh indoor conditions. STI-6535 is especially useful in increasing the lifespan of devices in saltwater areas or other severe environments.


  • Cover is UV-stabilized.

  • Gaskets included.

  • Protects against dirt and grime.

  • STI-6535 is for surface mount pull stations (flush - see STI-6525).

  • UL Listed to U.S. and Canadian safety standards.

  • For fire alarm applications, UL38 requires an outdoor listed station for outdoor use.

  • CSFM obtain local permission (AHJ)

  • Typical working properties of polycarbonate are -40° to 250°F (-40° to 121°C).

  • Three year guarantee against breakage of polycarbonate in normal use.

  • See Technical Data Sheet for dimensions.

  • ADA Compliant.

  • Custom labeling available (incurs a fee).