MQ-7 MQ7 Gas Sensor Module
The MQ7 is a simple-to-use Carbon Monoxide (CO) sensor suitable for sensing CO concentrations in the air. It can detect CO gas concentrations anywhere from 20 to 2000ppm. The sensitivity can be adjusted by the potentiometer.
MQ-7 MQ7 Gas Sensor Carbon Monoxide CO Gas Alarm Sensor Detection Module For Arduino New
Suitable for home or factory to detect carbon monoxide gas.
High quality dual-panel design, with power indicator and TTL signal output instructions.
DO switching signal (TTL) output and AO analog signal output.
TTL output valid signal is low. (When the output low signal is on, it can be directly connected micro-controller or relay module.)
Analog output voltage: the higher concentration, the higher voltage.
Have better sensitivity to carbon monoxide.
Four screw holes, easy positioning.
Long life and stability, quick response and resume.
Specification MQ-7 MQ7 Gas Sensor
Input voltage: DC 5±0.2V
DO output: TTL digital 0 and 1 (0.1 and 5V)
AO output: 0.1-0.3V (relatively clean), the highest concentration voltage is about 4V.
Dimensions: 33(L) * 21(W) * 17(H) mm
Wire connecting method:
VCC – positive pole (5V)
GND – negative pole
DO – TTL switch signal output
AO – analog signal output
1X MQ-7 Sensor Module