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Gas sensor with high sensitivity to low concentrations of gaseous air contaminants such as cigarette smoke and cooking odors.
The device is housed in a surface-mount ceramic package.
Due to the miniaturized sensing chip, the heater requires a current of only 15mW so the sensor is suitable for low-power equipment and battery-operated instruments.
In the presence of the gas to detect, sensor conductivity increases according to the gas concentration in the air.
A simple electrical circuit can convert the change in conductivity to an output signal which corresponds to the gas concentration.
The range is 1-30ppm of hydrogen.