This is very simple to use, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm.
This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.
- Rated Voltage: DC 5V
- Rated Current: 180mA
-
- Mainly used for CO collection detection in family, factory, underground operation.
- Characteristic Gas:100ppmm co.
- Sensitive Resistance:2K to 20K in 100ppm co.
- Sensitivity:>=3%.
- Response Time:<=1s.
- Recovery Time:<=30s.
- Heating Resistance:31±3.
- Heating Current:<=180mA.
- Heating Voltage:5.0V±0.2V /1.5±0.1V.
- Heating Power: about 350mW.
- Conditions:Ambient Temperature:-20C~+50C.
- Humidity:<=95%RH.
- Oxygen Content:21% .