Vintage Vanguard Protection System Model V2-25 FT Bell - Fully Functional For Sale

The vintage Vanguard Protection System Model V2-25 FT is a mechanically-wound heat detector and fire alarm manufactured by Interstate Engineering Corporation, Anaheim, California. It operates without batteries, sounding a very loud bell when the ambient temperature reaches roughly 136°F (58°C).The V2-25 FT Bell is a collectible piece of historical memorabilia related to firefighting and rescue. Made in the United States, this bell had a crucial role in alerting individuals of potential fire hazards or emergencies. Its design and craftsmanship reflect the innovation and resilience of firefighting and rescue efforts in the past, making it a desirable addition to any collection focused on firefighting history.All units for sale have been disarmed by taking off the center sensor plate. The bells rang from 3 and a half to 4 and a half minutes. Then sensor plate was returned. To arm the unit again, remove it from the mounting bracket and turn the winding mechanism clockwise until it stops.Though some simple cleaning was attempted, each bell shows age-appropriate cosmetic wear and tear. There may be some small scratches, paint specks, dust, dirt, etc.Each (6-inch) unit features their original yellow Vanguard label and Underwriters Laboratories of Canada sticker. All include their mounting bracket — perfect for display or décor.Key characteristics include:
Operation: The device uses a heat-sensitive element that expands or releases at a fixed temperature (136°F). Once triggered, it releases a coiled spring to ring a metallic bell.
Coverage: The "25" in the model name refers to a 25 ft radius of coverage.
Safety & Modern Use: As a historic device, it does not meet current UL smoke-detection standards for residential life safety. Consumer protection agencies require standard smoke and carbon monoxide detectors for home protection.