Fenwal Detect-A-Fire heat detector | stainless steel | 88 °C (190 °F), closing contact (NO)

Fenwal DETECT-A-FIRE is a rate-compensated heat detector used as an alarm device and to release extinguishing systems (clean agents, CO2, water, dry chemicals). The outer shell of a rapidly expanding alloy follows the surrounding air temperature, while the slower-expanding inner struts are sealed inside: in a slow fire the unit triggers exactly at the set point, in a fast fire earlier, but a transient rush of warm air (up to approx. 40 °F/min) does not trigger it. The detector is self-restoring, testable and factory set; the contacts are hermetically sealed in the stainless steel shell. Model 28021 is the vertical stainless steel coupling-head version whose contact closes on temperature rise; set point 190 °F (88 °C).

Key features

• Rate compensation – few false alarms
• Set point 88 °C (190 °F)
• Closing contact (NO), self-restoring and testable
• Hermetically sealed stainless steel shell
• UL/ULC listed, FM approved

Technical data