- The main chip: LM393, MQ135 gas sensing probe
- Operating voltage: DC 5V
Ammonia, nitrogen oxide, alcohols, aromatic compounds, sulfide and smoke
- Signal output indicator instructions.
- Dual signal output (analog output, and TTL level output).
- TTL output valid signal is low; (output low signal light, which can be accessed microcontroller IO port).
- Analog output with increasing concentration, the higher the concentration, the higher the voltage.
- Sulfide, benzene Department of steam, smoke and other harmful gases with high sensitivity.
- Has a long life and reliable stability.
- Rapid response recovery characteristics