This sensor module has an MQ-8 as the sensor component and has a protection resistor and an adjustable resistor on-board. A sensitive material MQ-8 Hydrogen H2 Gas Sensor Module use in clean air low conductivity tin oxide (SnO2). When there is the environment in which the combustible gas sensor, conductivity sensor with increasing concentration of combustible gases in air increases.

• 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 directly connect to the microcontroller or relay module)
• Analog 0 ~ 5 v voltage, the higher the voltage, the concentration of the analog output voltage is higher.
• Continuous analog output.
• A hydrogen gas detection with good sensitivity.
• There are four screw holes for easy positioning.
• Has a long life and reliable stability
• Rapid response and recovery characteristics