1. size: 32mmX22mmX27mm
2. Chip: LM393, ZYMQ-2 gas sensors
3.Working: dc 5V
4. Features:
1. a signal output instruction.
2. dual signal output (analog output, and TTL level output)
3. TTL output
4. 0 ~ 5V analog output voltage, the higher the concentration, the higher the voltage.