MEMS CH4 Methane gas sensor PN: S1008Y Product description MEMS methane gas sensor uses a unique MEMS process to make a high-temperature resistant micro-heating plate on a Si-based substrate, and uses a self-developed gassensing material nano-level metal oxide semiconductor material. When the detected gas exists in the ambient air, the conductivity of the sensor changes. 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. Sensor characteristics This product adopts MEMS technology, the structure is strong, and the sensitivity to combustible gas is high; it has the advantages of small size, low power consumption, high sensitivity, fast response recovery, simple drive circuit, good stability, long life and so on. Detection gas type: Methane (CH4): 0-10000ppm; Features: ➢ High sensitivity to methane (0-10000ppm) ➢ Quick response (~15Sec.) ➢ Very low power consumption (40~45mW) ➢ Ultra-small size (3.8mm × 3.8mm × 1.5mm) ➢ Long life (~ 5 years) ➢ Long-term stability ➢ Reflow soldering is possible ➢ Product anti-smoke, anti-alcohol, anti-silicon main application: ➢ Gas detection in civil, industrial and environmental protection ➢ Internet of Things, wearable d

1) Warm-up time If the sensor is stored for a long time without being energized, its resistance will produce a reversible drift. Before use, the sensor needs to be preheated to achieve an internal chemical balance. The preheat voltage is consistent with its heating voltage VH. The storage time and corresponding warm-up time are as follows: 2) Sensor calibration Sensor accuracy is affected by factors such as the difference in reference resistance, sensitivity, temperature, humidity, interfering gas, and aging time between sensors. There are nonlinear, hysteretic, and non-repeatable operating characteristics...

Structure diagram Package outline:

0.05 0.10 Pins 2 and 3 of the sensor are connected to the heating circuit, and pins 1 and 4 are connected to the measurement circuit; on the premise of meeting the electrical performance requirements of the sensor, heating and measurement can share the same power circuit. Measuring circuit Description: VH: DC 3.5V VC: DC 3.5V RL: For load resistance, in order to prevent damage to the gas sensor, it is recommended that RL^10KQ 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...

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 destruction of the heating material and sensor leads, but also cause irreversible changes in the performance of sensitive materials. 1.3 The pollution sensor of alkali, alkali metal salt and...