Carbon Monoxide Sensor - MQ-7: Difference between revisions
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==Introduction== | ==Introduction== | ||
[[File:MQ11.jpg| | [[File:MQ11.jpg|150px]] | ||
[[File:MQ-7.jpg]] | [[File:MQ-7.jpg|300px]] | ||
This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm. | This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm. | ||
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==Specification== | ==Specification== | ||
[http://www.geeetech.com/Documents/MQ-7%20Datasheet.pdf | MQ-7 datasheet [http://www.geeetech.com/Documents/MQ-7%20Datasheet.pdf ] | ||
==Usage== | ==Usage== | ||
[[File:MQ-7 wiring.jpg]] | [[File:MQ-7 wiring.jpg]] | ||
[[File:MQ-7 pic.jpg]] | |||
VCC - 5V | VCC - 5V | ||
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==How to buy it== | ==How to buy it== | ||
Click here to buy [http://www.geeetech.com/ | Click here to buy [http://www.geeetech.com/carbon-monoxide-sensor-mq7-p-295.html Gas Sensor - MQ-7] | ||
Latest revision as of 07:59, 10 May 2012
Introduction
This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm.
Features
- High sensitivity to CH4，Natural gas
- Small sensitivity to alcohol, smoke
- Fast response
- Stable and long life
- Simple drive circuit
Specification
MQ-7 datasheet [1]
Usage
VCC - 5V GND - GND S - Analog pin0
Example code
int sensorValue;
void setup()
{
Serial.begin(9600); // sets the serial port to 9600
}
void loop()
{
sensorValue = analogRead(0); // read analog input pin 0
Serial.println(sensorValue, DEC); // prints the value read
delay(100); // wait 100ms for next reading
}
How to buy it
Click here to buy Gas Sensor - MQ-7