STI 6535 Mini Weather Stopper Indoor/Outdoor Surface Mount







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 - 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 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 - 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).
  • Model: STI 6535
  • 3 Units in Stock
  • Manufactured by: STI Safety Technology Int'l

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