Fenwal 12-E27121-000-05 Sensor

As an HVACR contractor, you know that reliable fire protection in commercial ducting and air handling equipment starts with the Fenwal 12-E27121-000-05. This Detect-A-Fire vertical mount heat detector is engineered with a rate-compensation design, allowing it to accurately sense surrounding air temperature regardless of fire growth rate. Unlike standard rate-of-rise devices, the Fenwal heat sensor ignores transient thermal gradients to virtually eliminate false alarms while maintaining a fast response time index. Factory-set to 225 degrees F with a precise tolerance of +7°F/-8°F, the 12-E27121-000-05 ensures dependable signal initiation for fire suppression systems and alarm circuits. The unit features a close on rise contact action, hermetically sealed within a durable 300 series stainless steel shell to withstand harsh industrial environments. For secure and efficient installation, it utilizes a hex brass mounting head and is white color-coded for quick field identification of its temperature rating.

• Rate-Compensated Accuracy: Provides a unique advantage by responding at a predetermined danger point whether the fire growth is slow or fast.
• False Alarm Resistance: Ignores rapid ambient temperature fluctuations that typically trigger inferior rate-of-rise detectors.
• Rugged Construction: Built with a 300 stainless steel shell and brass head to resist corrosion and mechanical shock.
• Self-Restoring Design: The thermal switch resets automatically after reaching its 225 degrees F threshold, allowing for easy testing and maintenance.
• Industry Approved: Meets UL and FM standards for integration into critical fire safety and ventilation shutdown controls.

What is the advantage of a vertical mount hex head?
The vertical configuration with a hex brass mounting head allows for streamlined installation into threaded bulkheads or duct walls, ensuring the sensing shell is positioned directly in the airflow for optimal thermal detection.

Does this sensor require field calibration?
No. The Fenwal 12-E27121-000-05 is factory-set to a fixed 225 degrees F setpoint to maintain its high accuracy and tamper-proof reliability, eliminating the risk of field adjustment errors.

Can this be used for fire suppression release?
Yes, the close on rise contact action is specifically designed to complete an electrical circuit upon reaching its temperature threshold, making it ideal for actuating fire attack systems or emergency HVAC shutdowns.

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.