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Fenwal DETECT-A-FIRE 225F Detection and Release Device

Price: $394.00
Excl. Shipping
SKU: THE12E271215
(See Product Details Below for Manufacturers Part Numbers)
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Fenwal Industrial Controls

Description: DETECT-A-FIRE 225F

Category: Temperature Controls

SubCategory: Safety Controls

Detection and Release Devices


• Repeatable - resets itself, nothing to replace,

• Rugged - withstands shock and vibration

• Versatile - offers various temperature settings

• Durable - long lasting stainless steel shell

• Economical - wide spacing, reduces
installation cost

• Factory set and the internal contact area is
hermetically sealed in stainless steel


• Protection of schools, factories, offices,
libraries, etc.

• Paint spray booths

• Range hoods


DETECT-A-FIRE units 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, C02, water, or dry chemicals. In some

systems the device is used as an 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.

DETECT-A-FIRE units have met with wide acceptance

because they are designed with RATE COMPENSATION. This

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.

Fixed temperature detectors must be completely heated to

alarm temperature and therefore a disastrous lag in time may

occur with a fast rate fire. Rate-of-rise devices, on the other

hand, are triggered by the rate of increase in ambient temperature

and are subject to false alarms caused by harmless,

transient thermal gradients such as the rush of warm air from

process ovens.

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, actuating the

alarm or releasing the extinguishant.

A transient rush of warm air up to 40°F/min. may expand

the shell, but not enough to trigger the unit. By ignoring transient

warm air excursions, the DETECT-A-FIRE unit virtually

eliminates false alarms prevalent with

rate-of-rise devices.

If a fast rate fire starts, the shell will expand

rapidly. The struts will close, actuating the alarm or releasing

the agent. The faster the fire rate of growth,the sooner the

DETECT-A-FIRE unit will react.

Replaces Part Numbers: 12-E27121-000-05, CAR12-E27121-000-05

I called trying to find out what happened to the rest of my order and was surprised to hear a warm and kind voice willing to do whatever it takes to find answers and follow through with her promise. Amanda is an asset worth holding on to and a credit to your company. She was very professional, helpful and courteous while assisting me with my order. I would most definitely assign her an A+ in customer service."
Donald "Brad" Thomas

I would like to thank you for your hard work in getting us our part in a timely fashion. You were very helpful and you understood the severity of the situation and did a wonderful job in getting the part to us. Thanks again and please share this with your boss! You were outstanding!"
Todd Mills

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