Heat Detector

A heat detector is a fire alarm device which is designed to respond when the convected thermal energy of a fire increases the temperature of the heat sensitive element. The thermal mass and conductivity of the element regulate the rate flow of heat into the element.

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Detailed Description for Heat Detector

Heat detector is a fire alarm device designed to respond when the convected thermal energy of a fire increases the temperature of a heat sensitive element. The thermal mass and conductivity of the element regulate the rate flow of heat into the element. All heat detectors have this thermal lag. Heat detectors have two main classifications of operation, "rate-of-rise" and "fixed temperature."

 

Features:

1. Electronic thermistor sensing technology.

2. Standard quality to provide accuracy and stability

3. Uses a microprocessor for circuit control to assure performance stability and reliability

4. Loud alarm signal exceeding 85 dB at 3m

5. Test button to verify operation

6. Easy installation and maintenance.

7. Hush button, to stop the alarm from sounding.

8.  Meets EN54-5 and UL521 standards.

Heat detectors commonly have a label on them that says "Not a life safety device". That is because heat detectors are not meant to replace smoke detectors in the bedrooms or in the hallway outside of the bedrooms. A heat detector will nonetheless notify of a fire in a kitchen or utility area (i.e., laundry room, garage, or attic), where smoke detectors should not be installed. This will allow extra time to evacuate the building or to put out the fire if possible.

Specifications:

 

Power Supply

DC 9V Battery

Operating Temperature

-5 oC -+40 oC

Relative Humidity

15% -90% non-condensing

Alarm Indication

Audible and visual alarm

Buzzer Output

>85dB at 10 feet

Dimensions

102mm(D) x 41mm (H)

Test Facility

yes

Interconnection option

Up to 11 additional detectors

Sensitivity

Meet UL521 or EN 54-5

Response Temperature:

Fixed termperature: 57°C (135°F)

Rate-of-Rise function :>6.7°C(20°F) per minute

 

Mechanical heat detectors are independent fire warning stations that - unlike smoke detectors - can be installed in any area of a home. Portability, ease of installation, and excellent performance and reliability make this a good choice for residential fire protection when combined with the required smoke detectors. Because the detectors are not interconnected, heat activation identifies the location of the fire, facilitating evacuation from the home.

 

Each type of heat detector has its advantages, and it cannot be said that one type of heat detector should always be used instead of another. If you were to place a rate-of-rise heat detector above a large, closed oven, then every time the door is opened a nuisance alarm could be generated due to the sudden heat transient. In this circumstance the fixed threshold detector would probably be best. If a room filled with highly combustible materials is protected with a fixed heat detector then a fast-flaming fire could exceed the alarm threshold due to thermal lag. In that case the rate-of-rise heat detector may be preferred.

 


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