The ZE730-CO is a general-purpose, miniaturized gas detection module. This module incorporates a fuel cell-based electrochemical button sensor, which not only boasts low power consumption but also effectively avoids the leakage risk associated with traditional electrochemical sensors. In terms of circuitry, it employs an instrumentation amplifier and a high-precision AD converter to convert the detected gas concentration into a digital signal, which can be transmitted via serial port, PWM, and other signals. This ensures stable signal transmission and allows for multiple signal selection options.