Glynn-Johnson provides a holder/release smoke detector designed to allow fire doors to remain open for easy passage, while releasing doors in an emergency. The SensaGuard™ Series 280 features an internal ionization-type smoke detector, powered by a single nine-volt battery. Its fail-safe operation automatically releases the door when battery power drops below 7.2 volts.
Safe and Dependable
Ideal for a variety of uses, including: