968-034

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Natural gas is flammable substances with colorless and odorless through pipeline, which is an important source of energy to mankind. The leakage of natural gas might leads to economical losses due to resources waste and safety accident caused by fire and explosion. Therefore, the quick and accurate detection of natural gas leakage is of great importance to safety and economic benefits. Gas sensor is an important instrument used to detect the concentration of combustible gas or toxic gas in air, in order to realize gas leakage detection.

968-034 is a capacitive type gas sensor designed specifically for natural gas detection. It is based on the principle of capacitive. It uses a planar gas sensitive element in combination with the external components and circuits to form a complete capacitance gas detection system. The planar gas sensitive element is composed of a Layer film that is covered uniform dispersely with a certain amount of conductive particles and a pair of electrodes. The conductive particles material used has a certain natural gas adsorption rate, and when gas molecules absorb on the surface of the particles, the dielectric constant of the system changes, thus resulting in a change of the capacitance between a pair of electrodes to complete the gas detection.

There are two important performance indices for capacitive gas sensor including the sensitivity and response time. Specific to 968-034, its sensitivity has reached 0.2～2.0V/1000 ppm CO2 equivalence level with only 6-8 seconds of preheating, and it is not affected by humidity and temperature change. Its response time is just 6-8 seconds and it has good selectivity to the general combustible gases. It not only can be applied to natural gas detection, but also can be applied to other combustible gases, such as alcohol and LP gas etc., which has both fast and wide gas detection range.

In summary, 968-034 belonging to the family of gas sensors uses capacitor structure and can realize highly sensitive and rapid detection of natural gas and other combustible gases, with good selectivity and wide detection range capabilities. It is applicable for early warning and safety control of a variety of fields, such as gas station, gas transportation, storage and distribution, oil and chemical industry, production and manufacturing, fire source detection, kitchen etc.

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