1. Size: 32mm X22mm X27mm length X width X height
2. The main chip: LM393, ZYMQ-4 gas sensor
3. Operating voltage: DC 5 Volt
1. Indication of the signal output.
2. Dual signal output (analog output, and TTL level output)
3. TTL output signal is low. (When low output signal light, and can be connected directly to the microcontroller)
4. 0 ~ 5V analog output voltage, the higher the concentration, the higher the voltage.
5. Of methane gas, the natural gas has better sensitivity.
Suitable for home or factory methane gas, natural gas, and other monitoring devices.
1PCS MQ-4 MQ4 Methane Gas Sensor Natural Coal Co methane detector Arduino