Principle of contact combustion gas sensor
The contact combustion-type gas sensor is a sensor that detects gas concentration by utilizing the heat generated during the combustion (oxidation reaction) of flammable gases.
Contact combustion-type sensors are widely used for the detection of combustible gases such as methane and propane. They are also commonly used as gas leak detectors in industrial and household settings, playing a crucial role in safety measures.
basic information
It is widely used as a sensor to measure the concentration of combustible gases. The basic principle is to detect the heat generated when the gas comes into contact with the sensor element and burns, and convert this into gas concentration. Measuring gas concentration is achieved by using electrical reactions to understand "how many molecules are present in the gas?" The concentration is measured through the following mechanism: 1. A catalyst that reacts with combustible gas is applied to a heating coil, which is kept at a temperature conducive to combustion. 2. When the gas comes into contact with the element, the temperature rises according to the gas concentration. 3. The electrical resistance of the coil changes in response to the temperature change. Since there is a correlation between this electrical resistance and gas concentration, the concentration of the gas can be determined. Our company is also working on the development of micro-heater technology using semiconductor manufacturing techniques as a new technology to replace the conventional heating coil type. For more details, please see the link below. https://mono.ipros.com/product/detail/2001472733
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Detailed information
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1. The detection element is made by sintering an oxidation catalyst onto a platinum coil, and the element is maintained at a temperature of 300 to 450°C to enable gas combustion.
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2. The detection element that reacts with gas increases in temperature due to combustion heat.
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3. By detecting the temperature rise of this sensing element as a change in the electrical resistance of the coil, it is possible to determine the gas concentration.
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"The relationship between gas concentration and temperature change" This shows the relationship between temperature change and gas concentration in contact combustion type gas sensors.
