Main chip: LM393, MQ135 gas sensing probe

Working voltage: DC 5V

Features:

1. With signal output indicator indication;

2. Dual signal output (analog output and TTL level output);

3. TTL output valid signal is low level; (when output low level, the signal light is on, it can be connected to the IO port of the single chip)

4. The analog output increases with increasing concentration, and the higher the concentration, the higher the voltage;

5. High sensitivity to harmful gases such as sulfides, benzene vapors, and fumes;

6. Has a long service life and reliable stability;

7. Fast response recovery features;

8. With mounting holes for convenient installation;

9. The probe can be plugged and unplugged for easy testing.

Mq135 Lm393 Air Quality Density Gas Detection Sensor Module