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Fenwal Detect-A-Fire Fire Detectors

Series 27121 – Vertical Hex Head

The Fenwal Detect-A-Fire Fire Detectors are the "heart" of many fire protection systems. These highly reliable devices have been a standard of the industry for over 45 years. Many thousands of these units are now in use controlling the release of extinguishants such as clean agents, CO2, water, or dry chemicals. In some systems the Detect-A-Fire is used as a fire alarm device, to sense overheat or fire and alert personnel. In other systems it is used as a release device, to sense fire and actuate fire attack systems.

The Fenwal Detect-A-Fire has met with wide acceptance because it is designed with "rate compensation." Rate compensation provides a unique advantage over both fixed temperature and rate-of-rise types of detectors because only the Detect-A-Fire unit accurately senses the surrounding air temperature regardless of the fire growth rate. At precisely the predetermined danger point, the system is activated.

The secret of the unit's sensitivity is in the design. The outer shell is made of a rapidly expanding alloy which closely follows changes in surrounding air temperature. The inner struts are made of a lower expanding alloy. Designed to resist thermal energy absorption and sealed inside the shell, the struts follow temperature changes more slowly. A slow rate fire will heat the shell and struts together. At the "set point," the unit will trigger. A transient rush of warm air up to 40F/min. may expand the shell, but not enough to trigger the unit, virtually eliminating false alarms. If a fast rate fire starts, the shell will expand rapidly. The struts will close and the unit will trigger. The faster the fire rate of growth, the sooner the Detect-A-Fire will react.

Fenwal Detect-A-Fire units are not position sensitive. Horizontal and vertical detectors refer to the most common mounting configuration for that unit. Each type can be mounted either horizontally or vertically depending on the application and installation requirements.

Download Fenwal Detect-A-Fire Datasheet (pdf)
Fenwal Detect-A-Fire Vertical Hex Head


FEATURES:
  • Repeatable - resets itself, nothing to replace, testable
  • Rugged - withstands shock and vibration
  • Versatile - offers various factory set temperature settings
  • Durable - long lasting stainless steel shell
  • Economical - wide spacing, reduces installation costs
  • Internal contact area is hermetically sealed in stainless steel
  • Color coded to show temperature rating
Fenwal Detect-A-Fire Fire Detectors - ORDERING
Model Number. Mounting
Configuration
Construction Contact Action
on Temp. Rise
Maximum
Temperature
Temp.Settings (ºF) (*=Stocked) Price Order Quantity
12-E27121-000-140 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 140ºF 140* $225.00
  Enter qty:  
12-E27121-000-160 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 160ºF 160* $225.00
  Enter qty:  
12-E27121-000-190 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 190ºF 190* $225.00
  Enter qty:  
12-E27121-000-210 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 210ºF 210* $225.00
  Enter qty:  
12-E27121-000-225 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 225ºF 225* $225.00
  Enter qty:  
12-F27121-000-275 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 275ºF 275* $234.00
  Enter qty:  
12-F27121-000-325 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 325ºF 325* $234.00
  Enter qty:  
12-F27121-000-360 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 360ºF 360* $234.00
  Enter qty:  
12-G27121-000-450 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 450ºF 450* $243.00
  Enter qty:  
12-G27121-000-500 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 500ºF 500 $243.00
  Enter qty:  
12-H27121-000-600 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 600ºF 600* $255.00
  Enter qty:  
12-H27121-000-725 Vertical
Hex Head
St. Steel Shell
Brass Head
Closes 725ºF 725* $255.00
  Enter qty:  
12-E27121-020-140 Vertical
Hex Head
All Type 300
St. Steel
Closes 140ºF 140* $285.00
  Enter qty:  
12-E27121-020-160 Vertical
Hex Head
All Type 300
St. Steel
Closes 160ºF 160* $285.00
  Enter qty:  
12-E27121-020-190 Vertical
Hex Head
All Type 300
St. Steel
Closes 190ºF 190* $285.00
  Enter qty:  
12-E27121-020-210 Vertical
Hex Head
All Type 300
St. Steel
Closes 210ºF 210 $285.00
  Enter qty:  
12-E27121-020-225 Vertical
Hex Head
All Type 300
St. Steel
Closes 225ºF 225* $285.00
  Enter qty:  
12-F27121-020-275 Vertical
Hex Head
All Type 300
St. Steel
Closes 275ºF 275* $294.00
  Enter qty:  
12-F27121-020-325 Vertical
Hex Head
All Type 300
St. Steel
Closes 325ºF 325 $294.00
  Enter qty:  
12-F27121-020-360 Vertical
Hex Head
All Type 300
St. Steel
Closes 360ºF 360 $294.00
  Enter qty:  
12-G27121-020-450 Vertical
Hex Head
All Type 300
St. Steel
Closes 450ºF 450 $303.00
  Enter qty:  
12-G27121-020-500 Vertical
Hex Head
All Type 300
St. Steel
Closes 500ºF 500 $303.00
  Enter qty:  
12-H27121-020-600 Vertical
Hex Head
All Type 300
St. Steel
Closes 600ºF 600* $320.00
  Enter qty:  
12-H27121-020-725 Vertical
Hex Head
All Type 300
St. Steel
Closes 725ºF 725 $320.00
  Enter qty:  
NOTE: Stocked units generally ship in 5-7 working days, non-stock in 2-3 weeks. FOB: Inglewood, CA
This page last modified on 12/29/2016
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