Size: 32 mm X22mm X27mmMain chip: the LM393, MQ-6 gas sensorWorking voltage: DC5V1. With a signal output instructions.2. Dual signal output (TTL level output and analog output)3. TTL output valid signal for low level. (when the low output electric signal lights at 4. ordinary times, can be directly pick up SCM)5. Analog 0 ~ 5 v voltage, the higher the concentration, the higher the voltage.6. High sensitivity to hydrogen7. Can be resistant to ethanol steam, LPG (petroleum), smoke interference8. Has a long service life and reliable stability9. Quick response recovery features
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