H2S gas sensor
5Pages

Catalog excerpts

description S1007Y is a micro metal oxide semiconductor gas sensor based on MEMS micro hot plate technology, used to detect hydrogen sulfide in the air. The production of the sensor combines MEMS silicon substrate technology, thin film technology, thick film technology, and metal packaging technology. When the sensor is in a polluted gas environment, the conductivity of the sensor changes with the concentration of the detected gas in the air. The higher the concentration of the gas, the higher the conductivity of the sensor. Using a simple circuit, the change in conductivity can be converted into an output signal corresponding to the gas concentration. Detection gas type: Hydrogen sulfide: 0-50ppm; Features: High sensitivity to hydrogen sulfide (0-50ppm) Quick response (~15Sec.) Very low power consumption (40~45mW) Ultra-small size (3.8mm x 3.8mm x 1.5mm) Long life (~ 5 years) Long-term stability Reflow soldering is possible main application: Detection of formaldehyde in civil, industrial and environmental protection Internet of Things, wearable devices Smart home

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2) Sensor calibration The precision of the sensor is affected by the difference of reference resistance, sensitivity, temperature, humidity, interfering gas, aging time and other factors, and its input-output performance is nonlinear, hysteresis and nonrepeatability. Therefore, it is necessary to calibrate the absolute concentration measurement periodically (single point/multi-point calibration can be carried out within the full range) to ensure the accurate transmission of the quantity value, while calibration is not required for relative measurement. 3) The air sensitive resistance R0 is...

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Package outline: Description: VH: DC 3.5V V c: DC 3.5V RL is the load resistance. To prevent damage to the gas sensor, it is recommended that RL ≥ 20KΩ. In order to maximize the performance advantages of the gas sensor, the temperature compensation design of the heating circuit can be performed. If you need to design a temperature compensation, please contact us to learn more about the specific method of temperature compensation.

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Precautions 1 Situations that must be avoided 1.1 Exposure to silicone vapor If silicone vapor is adsorbed on the surface of the sensor, the sensitive material of the sensor will be wrapped up, suppressing the sensitivity of the sensor and irrecoverable. The sensor should avoid being exposed to the places where silicone adhesive, hair spray, silicone rubber, putty or other silicon-containing plastic additives may exist. 1.2 Highly corrosive environment Exposure of the sensor to high concentrations of corrosive gases (such as H2S, SOX, Cl2, HCl, etc.) will not only cause corrosion or...

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