Concept: Fire detectors are triggering devices of self-report systems, and are divided into fire detectors such as smoke, temperature, light, gas, and images according to the corresponding objects. Classification 1: According to the response object, it is divided into: 1 smoke-se

1, Concept: Fire detector is the trigger device of the self-report system, and is divided into fire detectors such as smoke, temperature, light, gas, and images according to the corresponding objects.

2. Classification 1: According to the response object, it is divided into:

1 smoke sensing:

① Point-type smoke sensing

② Linear beam smoke sensing

③Aspiration smoke sensing

2 temperature sensing:

① Point-type temperature sensing

② Linear-type temperature (cable type, air tube type, distributed fiber, fiber grating , linear multi-point)

3 photosensitive:

① Point-type infrared

② Point-type ultraviolet

③ Point-type infrared , UV composite

4 carbon monoxide fire detector (detect gas concentration )

5 image type fire detector (recognize image information)

3. Classification 2: According to the application stage of the detector in the fire occurrence process, it is divided into: as shown in the figure:

html ml21 Hidden danger stage:

① Combustible gas alarm system: applied to places where combustible gases or combustible steam are produced or used

② Electrical fire monitoring system: used to detect residual current, abnormal temperature rise, leakage, circuit breaker and overload of the line; its detectors can be divided into: residual current type electrical fire detector , temperature measurement type electrical fire detector and fault arc type electrical fire detector .

2 Heat smoldering stage: belongs to early fire detection.

①Aspirated smoke sensing: It is by actively absorbing sample gas and analyzing the concentration, which can detect slight concentration changes and achieve early fire detection.

② Carbon monoxide detector : In the smoldering stage of many fires, there is a high probability that carbon monoxide will be insufficiently burned.

③Linear Sensitive Temperature: Linear Sensitive Temperature Sensitive Temperature Sensitive Temperature Sensitive Temperature Sensitive Temperature of the object can be detected quickly to achieve the effect of early detection.

3 visible smoke stage:

① Point-type smoke sensing: Currently, the most widely used smoke sensing detector .

②Linear beam smoke sensing: It is applied to large spaces without obstruction. The smoke rises, the light column is blocked, the light reduction rate reaches a certain value, and the alarm starts to be called.

4 Flame stage: is a fire detector that responds to optical radiation .

①Ultraviolet

②Infrared

③Ultraviolet and infrared composite

④Image type

⑤Point type temperature sensing