How to choose a point fire detector?

The following places should choose a point-type smoke fire detector

Restaurants, hotels, teaching buildings, office building halls, bedrooms, offices, shopping malls, etc.; Computer room, communication room, film or TV projection room, etc.; Stairs, walkways, elevator room, garage, etc.; Library, archive, etc.

It is not advisable to select a point-type ionic smoke detector

Relative humidity is often greater than 95%; The airflow speed is greater than 5m/s; There are a lot of dust, water mist retention; May produce corrosive gases; Under normal conditions, there is smoke retention; Produce alcohols, ethers, ketones and other organic substances.

It is not advisable to select a point-type photoelectric smoke detector

There are a lot of dust, water mist retention; May produce steam and oil mist; High altitude areas; Under normal conditions there is smoke retention, etc.

It is advisable to select a point-type thermal fire detector

Relative humidity is often greater than 95%; Smokeless fires may occur; There is a lot of dust; Smoking rooms and other places where there is smoke or vapor retention under normal circumstances; Kitchens, boiler rooms, generator rooms, drying workshops and other places where smoke detectors should not be installed; The inside of the safety exit of the "safety exit" sign light needs to be put off; Other places where no one is stranded and it is not suitable to install smoke fire detectors, but where timely alarm is required in case of fire.

It is advisable to select a point-type thermal fire detector

It is not appropriate to select a point-type temperature fire detector in places where smouldering or fires that do not alarm in time will cause heavy losses; Where the temperature is below 0 ° C, it is not appropriate to choose a fixed temperature detector; In places with large temperature changes, it is not appropriate to choose a detector with differential temperature characteristics.

It is advisable to choose a point type flame detector or a picture type flame detector

The fire has strong flame radiation; Non-smoldering stage fires such as liquid combustion may occur; Need a quick response to the flames.

It is not appropriate to select a point type flame detector and a picture type flame detector

Smoke spreads before flames appear; The lens of the detector is prone to contamination; The "line of sight" of the detector is easily blocked by oil mist, smoke, water mist and snow and ice; The combustibles in the detection area are metals and inorganic substances; The detector is susceptible to direct or indirect exposure to light sources such as sunlight and incandescent lamps.

It is not advisable to choose a single band infrared flame detector

In the detection area where there are high temperature objects under normal circumstances, it is not appropriate to choose a single band infrared flame detector.

A purple flame detector is not recommended

Under normal circumstances, there is sunlight, open flame operation, the detector is susceptible to X-ray, arc and lightning and other places, should not choose purple flame detector.

Combustible gas detectors should be selected in the following places

Places where combustible gases are used; Gas stations and gas meter houses and places for the storage of liquefied petroleum gas tanks; Other places that emit flammable gases and vapors.

Optional point-type carbon monoxide fire detector

Places where smoke is not easily convection or where there is a thermal barrier below the ceiling; Places where other point fire detectors cannot be installed on the roof of the shed; Need multi-signal compound alarm place.

An aspirated smoke detector is available

If there is a lot of dirt and a smoke detector must be installed, select a point sampling smoke detector with intermittent breathing or a pipe sampling smoke detector with filter and pipe self-cleaning functions.