12-G28021-005-07 Fenwal Detect-A-Fire Thermal Detector – 450°F Close on Rise
The Fenwal 12-G28021-005-07 Detect-A-Fire (D-A-F) Thermal Detector is a high-performance fire protection device designed for reliable detection and system activation. Rated for 450°F with Close-on-Rise operation, this detector combines fixed temperature and rate-of-rise technology for precise, accurate response in a wide range of commercial, industrial, and specialized applications.
✅ Key Features
-
450°F Close-on-Rise – triggers system at the set temperature or faster rise
-
Green color coding – easy identification of temperature rating
-
Vertical mount – optimized installation orientation
-
Stainless steel construction – 300 series shell and mounting head for durability
-
Repeatable & self-restoring – no replacement required after activation test
-
Rugged & shock resistant – withstands vibration and industrial environments
-
Factory set – ready to install with +/- 15°F tolerance
-
Hermetically sealed internal contact – corrosion-resistant stainless steel design
-
ROHS Compliant – environmentally safe
📊 Technical Specifications
| Specification | Details |
|---|
| Manufacturer |
Fenwal |
| Part Number |
12-G28021-005-07 |
| Type |
Detect-A-Fire Thermal Detector |
| Temperature Rating |
450°F |
| Operation Type |
Close on Rise |
| Mounting Orientation |
Vertical |
| Shell Material |
300 Stainless Steel |
| Mounting Head Material |
300 Stainless Steel |
| Tolerance |
±15°F |
| Certification |
UL Listed, UL of Canada (upon request), FM Approved |
⚡ Applications
-
Schools, factories, offices, libraries
-
Power generation facilities
-
Gas station islands
-
Paint spray booths
-
Range hoods and engine compartments
-
Systems using clean agents, CO2, water, or dry chemical extinguishants
-
Fire alarm systems for overheat or fire detection
⚡ Common Problems Solved
❌ Late or inaccurate fire detection due to fixed temperature or rate-of-rise limitations
❌ System failures caused by harsh industrial conditions
❌ High installation and maintenance costs due to limited spacing
❌ False alarms caused by temperature fluctuations
❓ Frequently Asked Questions (FAQ)
Q: What does “Close-on-Rise” mean?
✅ The detector closes its contacts when the temperature reaches 450°F or rises rapidly, triggering the fire protection system.
Q: Is this device UL listed?
✅ Yes, UL Listed, UL of Canada available on request, and FM Approved.
Q: Can this detector be reused after activation?
✅ Yes, it is self-restoring and does not require replacement after a test activation.
Q: What makes Detect-A-Fire detectors unique?
✅ They use rate compensation technology, accurately sensing surrounding air temperature regardless of fire growth rate.
Q: Where can this detector be installed?
✅ Suitable for schools, offices, industrial facilities, engine compartments, and specialized fire protection systems.
