Fire Gas Detection

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GSME Brandgas Melder

Fire Gas Detection

Fires produce gases whose composition allows conclusions to be drawn about the type of fire and the material. It also shows whether there is actually a fire. Smoldering fires release smoke (aerosols) and various gases. In addition to carbon dioxide (CO2) and water (H2O), these include the characteristic smoldering gases carbon monoxide (CO), hydrogen (H2) and a broad cocktail of various hydrocarbons. Depending on the material, HCl, H2S, HCN, NOX and other components are also produced. GTE Industrieelektronik GmbH offers a detector for this purpose, which responds to the gases carbon monoxide (CO), hydrogen (H2), phenolic hydrocarbons (HC) and qualitatively to nitrogen oxides (NOX) with the aid of four different gas sensors. The detection sensitivity is in the range of a few ppm.

Long-life Semiconductor Gas Sensors

The lifetime of semiconductor gas sensors is much longer than that of many other sensors (e.g. amperometric or electrochemical sensors). A semiconductor layer is deposited on a heated carrier substrate. The sensor signal is obtained from the electrical conductance of this layer. Depending on the gas to be detected, the optimum operating temperature can be up to 450 °C.

Robust Design for Industrial Environments

The fire gas detector GSME and its sensors are integrated in a die-cast aluminum housing; the gases diffuse through a sintered metal filter to the sensor elements. A robust and dust-tight design is thus achieved. A type-tested housing variant is available for areas that are at risk from dust explosions.

Typical Types of Fires and Released Gases

Sources of Interferences

ADICOS fire gas detection, table, sources of interferences and released gases

No False Alarms due to Interfering Signals

Interferences caused by natural outgassing of conveyed materials or exhaust gases from conveying vehicles can be tolerated thanks to multi-criteria evaluation. This also applies to historical buildings in which, unlike in contemporary residential or industrial buildings, various types of dust or biological decomposition processes cause interference. No false alarms due to interfering signals Interferences caused by natural outgassing of conveyed materials or exhaust gases from conveying vehicles can be tolerated thanks to multi-criteria evaluation. This also applies to historical buildings in which, unlike in contemporary residential or industrial buildings, various types of dust or biological decomposition processes cause disruption. In principle, the signal spectrum customary on site is first recorded during commissioning. These findings are taken into account for the parameterization of the detectors.

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Fire Gas Detectors GSME

ADICOS GSME are compact fire gas detectors for early detection of all types of concealed and open fires – and that already in the incipient stage. Highly sensitive yet robust and extremely safe against spurious alarms, they are ideal for fire gas detection in industrial environments.

Industrial Fire Detection ADICOS