Piezoelectric crystal gas transducer and method for producing the same

The invention provides a piezoelectric crystal gas sensor and preparation method thereof, belonging to the sensor preparation technical field. The silver-plated quartz crystal vibration slice is used as the substrate and set in a home-made micro-reactor and the in-situ synthesis of conductive polymers on the surface of the quartz crystal vibration slice is performed using the electrochemical method, wherein the electrochemical method can be electrical-potential electric method, galvanostatic method, and the polymers can be polyaniline, polypyrrole, polythiophene or the like. The electric parameter of the quartz crystal microbalance is used to detect the concentration of gas contacting with the surface of the sensitivity film with features of high accuracy, high sensitivity, short responsetime, low cost, ease of large-scale industrial production.