Module Features: Using high-quality dual-panel design, with power indicator and TTL signal output instructions ; The switching signal having a DO (TTL) output and analog output AO ; TTL output valid signal is low . ( Low-level signal when the output light can be directly connected to the microcontroller or relay module ) The higher the voltage, the concentration of the analog output voltage is higher. For methane, natural gas has a good detection sensitivity. There are four screw holes for easy positioning ; Dimensions : 32 (L) * 20 (W) * 22 (H) Rapid response and recovery characteristics
