Fenwal 12-E27121-000-04 Detector

The Fenwal 12-E27121-000-04 is a precision-engineered Detect-A-Fire vertical detector designed for high-hazard industrial and commercial environments. This rate-compensation heat detector operates with a 190°F (88°C) temperature setpoint and a Close on Rise contact configuration, making it ideal for triggering fire suppression systems, including CO2, clean agent, and dry chemical units. Utilizing a 300 stainless steel shell and a hex brass mounting head, this unit is built for superior shock and vibration resistance. Its unique self-restoring design ensures the sensor remains repeatable and testable without replacement after activation. With a Fast Response Time Index and a tight tolerance of +7°F/-8°F, the Fenwal 12-E27121-000-04 eliminates the thermal lag common in conventional bimetallic sensors, ensuring rapid activation when the ambient temperature reaches the designated threshold. Its white color coding allows for immediate identification of its thermal rating during field inspections.

Key Benefits for Contractors:

• Rate-Compensation Technology: Provides faster response times than standard fixed-temperature detectors by reacting to the rate of temperature rise.
• Rugged Construction: The 300 series stainless steel shell prevents corrosion in harsh mechanical or chemical environments.
• Reduced Installation Costs: Wide spacing UL/FM ratings allow for fewer units per square foot compared to competing thermal sensors.
• Vertical Orientation: The hex brass head allows for secure, leak-proof threading into ceiling or machinery mounts.
• Field Testable: Since the unit is self-restoring, it can be tested with a heat lamp or heat gun without destructive failure.

Common Questions:

How does the Close on Rise function work in a fire loop?
In a 12-E27121-000-04, the internal contacts are normally open. When the 190°F setpoint is reached, the contacts close to complete the circuit, typically signaling a fire alarm control panel or releasing an extinguishing agent.

Can this detector be used in outdoor or wash-down areas?
While the stainless steel shell is highly durable, ensure the hex brass mounting is properly sealed with appropriate pipe dope or Teflon tape for the specific application environment to maintain enclosure integrity.

What is the significance of the white color coding?
Fenwal uses color-coded leads or markings to signify temperature ratings; white coding specifically identifies this as a 190°F rated unit, preventing cross-contamination with different temperature-rated sensors in the same facility.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.