Vanguard Thermosonic V-50 Vintage Heat Detector Fire Alarm

This is a vintage Vanguard Thermosonic Model V-50 heat detector. It functions as a heat alarm, triggering when the ambient temperature reaches a certain threshold (e.g., 136 or 145 degrees Fahrenheit). It operates using a clockwork mechanism and a bimetallic strip, so no electricity or batteries are needed. The design is mid-century modern with a sturdy metal housing and a bronze-gold textured finish, featuring a space-age atomic design. Approximate dimensions are 7 inches in diameter by 2.5 inches thick. Manufactured by Interstate Engineering Company. Cash only, in-person sales. Located near Steeles Ave & Trafalgar Rd in Hornby, Halton Hills, Ontario.