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Summary of Contents for SeeedStudio Grove MQ3
- Page 1 Grove - Gas Sensor (MQ3) Release date： 9/20/2015 Version： Wiki: http://www.seeedstudio.com/wiki/Grove_-_Gas_Sensor(MQ3) Bazaar: http://www.seeedstudio.com/depot/Grove-Gas-SensorMQ3-p-1418.html...
- Page 2 Document Revision History Revision Date Author Description Sep 21, 2015 Victor.He Create file...
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Page 3: Table Of Contents
Contents Document Revision History · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2 1. - Page 4 Disclaimer For physical injuries and possessions loss caused by those reasons which are not related to product quality, such as operating without following manual guide, natural disasters or force majeure, we take no responsibility for that. Under the supervision of Seeed Technology Inc., this manual has been compiled and published which covered the latest product description and specification.
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Page 5: Introduction
1. Introduction The Grove - Gas Sensor (MQ3) module is useful for gas leakage detecting (in home and industry). It can detect Alcohol, Benzine, CH4, Hexane, LPG, CO. Based on its fast response time. Measurements can be taken as soon as possible. Also the sensitivity can be adjusted by the potentiometer. -
Page 6: Features
2. Features High sensitivity to alcohol and small sensitivity to Benzine Stable and long life Fast response and High sensitivity... -
Page 7: Application Ideas
3. Application Ideas They are suitable for alcohol checker, Breathalyser. Toys... -
Page 8: Mechanic Dimensions
4. Mechanic Dimensions Electronic Characteristics Items Parameter name Type Unit System Characteristics Working Voltage Heating consumption Load resistance can adjust Ω Heater resistance Sensing Resistance MΩ Scope Detecting 0.05 mg/L Concentration... -
Page 9: Usage
5. Usage Suggest Reading for Starter Download Arduino and install Arduino driver Getting Started with Seeeduino How to choose a Gas Sensor What's LEL Hardware Installation Grove products have a eco system and all have a same connector which can plug onto the Base Shield. -
Page 10: How To Use
How to use There're two steps you need to do before getting the concentration of gas. First, connect the module with Grove Shield using A0 like the picture above. And put the sensor in a clear air and use the program below. void setup() { Serial.begin(9600);... - Page 11 void setup() { Serial.begin(9600); void loop() { float sensor_volt; float RS_gas; // Get value of RS in a GAS float ratio; // Get ratio RS_GAS/RS_air sensorValue = analogRead(A0); sensor_volt=(float)sensorValue/1024*5.0; RS_gas = (5.0-sensor_volt)/sensor_volt; // omit *RL /*-Replace the name "R0" with the value of R0 in the demo of First Test -*/ ratio = RS_gas/R0;...
- Page 12 According to the figure, we can see that the minimum concentration we can test is 0.1mg/L and the maximum is 10mg/L. However, we can't provide a formula because the relation between ratio and concentration is nonlinear. But also, we can convert mg/L to ppm, it may be convenient for us to watch the value.
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Page 13: Support
6. Support Ask questions on Seeed forum. -
Page 14: Version Tracker
7. Version Tracker Revision Descriptions Release v0.9b Initial public release 16,Aug,2011 v1.4 Replace some components 27,Aug,2014... -
Page 15: Resources
8. Resources File:Gas Sensor Eagle files.zip File:Gas Sensor Schematic.pdf File:MQ-3.pdf... -
Page 16: Licensing
9. Licensing This documentation is licensed under the Creative Commons Attribution-ShareAlike License Source code and libraries are licensed under GPL/LGPL, see source code files for details.
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