Kidde Fenwal 27021-0 Detect-A-Fire 360­° Horizontal Flush Mount Heat Detector, Normally Open Contacts

Deliver consistent, dependable fire detection where accurate thermal monitoring matters most. The Kidde Fenwal Detect-A-Fire 27021-0 heat detector is a rate-compensated, flush-mount temperature sensor engineered to detect real ambient temperature changes and minimize false alarms from transient thermal gradients. Its 360° horizontal flush-mount profile provides unobtrusive coverage for ceilings and enclosures while the stainless-steel, hermetically sealed construction protects internal normally open contacts against corrosion and environmental contamination.

Designed for integration with fire suppression and monitoring systems, the 27021-0 supports 120V AC and 24/48V DC power supplies and is factory-set for dependable, repeatable operation. Because the detector senses heat changes rather than relying solely on fixed thresholds or rapid-rise triggers, it offers reliable performance across a wide range of fire growth scenarios—ideal for data centers, server rooms, industrial spaces, and critical security or surveillance environments.

Specify the Kidde Fenwal Detect-A-Fire 27021-0 for applications that require precise thermal monitoring and robust, low-maintenance protection. Contact us to discuss placement and integration with your fire suppression or monitoring system.

• Reliable, rate-compensated heat detection that senses true ambient temperature changes for faster, more accurate fire response
• 360° horizontal flush-mount design for discreet, low-profile installation in ceilings and walls
• Hermetically sealed, normally open contacts in a stainless-steel shell for long life and corrosion resistance
• Self-restoring, repeatable operation reduces maintenance and replacement costs
• Wide power compatibility (120V AC, 24V/48V DC) and proven integration with suppression and monitoring systems