What Is a Flame Detector?

A flame detector is used to detect that when a substance burns, it generates smoke and emits heat, and also generates visible or invisible light radiation that is not in the atmosphere.

Flame detector

A flame detector is used to detect that when a substance burns, it generates smoke and emits heat, and also generates visible or invisible light radiation that is not in the atmosphere.

Chinese name

Flame detector

Foreign name

flame detector

For ultraviolet light with a wavelength of 0.185 ~ 0.260 microns generated in flame combustion, a solid substance can be used as a sensitive element, such as silicon carbide or aluminum nitrate, or an inflatable tube can be used as a sensitive element, such as a Geiger-Miller tube.

For the infrared of 2.5 ~ 3 micron wavelength generated in the flame, a sensor of aluminum sulfide can be used, and for the infrared of 4.4 ~ 4.6 micron wavelength generated by the flame, a sensor of lead selenide or aluminum tantalate can be used. Different sensors can be selected according to the spectrum of different fuel combustion emissions. Triple infrared (IR3) is widely used.

Explosion-proof grade: CENEL EC EExd BT5;

Sensitivity: 0.1m2 of flammable medium (gasoline, diesel, aviation kerosene, ethanol, heptane), the sensitivity has 4 ranges (15m / 30m / 45m / 60m) can be set.

Response time: 2s;

Angle of view: horizontal --- 90 °

Vertical90 °;

Power supply: 18 32V DC;

Power consumption: 200mA (when working normally);

150mA (when alarming);

Self-test function: automatic and manual;

Signal output: 4 20mA DC;

Relay contact: alarm-2A, 30V DC or 250V AC;

Failure-2A, 30V DC or 250V AC;

Cable outlet thread: standard 3/4 (1 = 25.4mm) 14NPT thread;

Working temperature:-40 70 ;

Weight: 3.5 kg; 6. 5 kg (with stainless steel, cast aluminum).

Optical flame detector

Exploration, production, storage and unloading of oil and gas,

Offshore drilling --- fixed platform, floating production storage and loading,

Land drilling --- Refineries, natural gas reloading stations, pipelines,

Petrochemical products --- production, storage and transportation facilities, oil depots, chemicals,

Flammable materials storage warehouse, automobile --- manufacturing, paint spray booth,

Aircraft --- industrial and military, explosives and munitions;

Car --- painting room

Pharmaceutical industry

Production, storage, and transportation of high-risk industrial dyes such as powder houses.

1. The general principle is to install the detector at twice the height of the highest target in the protected area. Within the effective range of the detector, it cannot be blocked by obstacles, including transparent materials such as glass and other spacers. It can also cover all targets and areas needing protection, and is convenient for regular maintenance.

2. When the detector is installed, it is generally inclined at an angle of 30-45 ° downwards, which can look down and forward, while reducing the possibility of pollution to the mirror surface. All possible fires in the protected area should be kept incident in a straight line to avoid indirect incidents and reflections.

3. In order to avoid detecting blind spots, another flame detector is usually installed in the opposite corner, and it can also provide a backup when one of the flame detectors fails.

The previous points are generally pay attention to when the flame detector is installed, and here is a friendly reminder that special attention should be paid to: avoid possible false alarm sources within the cone detection range of the flame detector.