MEMS alcohol gas sensor

Product overview The S1005Y is a miniature metal oxide semiconductor gas sensor based on MEMS micro-hot plate technology for the detection of alcohol 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. A simple circuit can be used to convert the change in conductivity...

1) Warm-up time If the sensor is stored for a long time without power on, its resistance will have reversible drift. Before use, the sensor shall be preheated to achieve internal chemical balance. The preheating voltage shall be consistent with the heating voltage VH. The storage time and corresponding preheating time are suggested as follows: 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 non-repeatability....

Structure diagram Package outline:

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 electncal performance requirements of the sensor, heating and measurement can share the same power circuit RL as the load resistance, to prevent damage to the gas sensor, suggested that RL Q 10 k or higher. In order to give full play to the performance advantage of gas sensor, the heating circuit can be designed with temperature compensation. If you need a temperature compensation design, please contact us to learn more about the specific method...

Precautions 1. Situations that must be avoided 1.1 Exposure to silicone vapor If silicone vapor is absorbed onto the surface of the sensor, the sensor's sensitive material will be trapped, inhibiting the sensor's sensitivity and not recoverable. The sensor should avoid exposure where silicon adhesives, hair gels, silicone rubber, putty or other silicon-containing plastic additives may be present. 1.2 Highly corrosive environment Sensors exposed to high concentration of corrosive gases (such as H2S, SOX, Cl2, HCl, etc.) will not only cause corrosion or damage of heating materials and sensor leads,...

2.7.1 Flux: rosin flux with least chlorine 2.7.2 Speed: 1-2 m/min 2.7.3 Preheating temperature: 100±20℃ 2.7.4 Welding temperature: 250±10℃ 2.7.5 Pass the wave soldering machine once Violation of the above conditions will degrade the sensor characteristi