In order to effectively prevent the excessive concentration of harmful gases from causing damage to economic benefits and the safety of human life and property,a new detection method has been proposed and designed.Through a series of tests on micro/nano ionizing sensors,the designed sensor exhibits strong bending resistance and fast response recovery ability.Multiple concentrations of benzene and toluene gases are tested under experimental conditions of room temperature,atmospheric pressure,and relative humidity of 75%.Corresponding recognition models are constructed based on the intensity of characteristic noise to identify the concentration of the gas.The experimental results show that the fitting degree between the measured value and the true value of the sensor for detecting harmful gases can reach over 99%,reflecting high detection accuracy.Moreover,the sensor is in a reversible ionization equilibrium state when detecting harmful gases,with good repeatability and without preheating.It is safe and non-toxic.Therefore,it is suitable for application in the detection of benzene gases,meeting the requirements of efficiency and accuracy,and has certain practicality.