An Array Sensor Measurement Method for Easily Confused Gases (CO, H2, CH4) in the Field Based on Cross-Talk Characteristics

The three gases CO, H2, and CH4 are currently prevalent in various industrial environments, posing a threat to life and property. However, the crosstalk phenomenon between the gas mixtures cannot be avoided by technological improvement in practical measurements. To adapt to field measurement requirements, this paper experimentally investigates the crosstalk characteristics of mixed gases and proposes a measurement method based on the cross-talk characteristics of field-confusable gas array sensors. The experimental results show that compared with the traditional direct measurement method, the proposed method reduces the crosstalk error from 50.1% to 10.3%, which significantly improves the accuracy of the field detection. At the same time, the method is not limited by the sensor category, which is applicable to the field measurement of various types of array sensors.