Natural Gas, NG Sensor - mhightower83/Arduino-ESP8266-misc GitHub Wiki
Natural Gas Sensor
Research:
- There are at least two brands of MQ sensors Winsen and Hanwei with datasheet differences.
- Hackaday.io: MQ-4 Buyer Beware
- Strange, Zhengzhou Winsen Electronics Technology Co., Ltd. is a subsidiary of Hanwei Electronics Group Corporation. ref
- Looking at an eBay seller, the data they present doesn't match either of these :(
- Lacking a precision calibration environment and the sensor's sensitivity to a group of gases, these sensors can only function as a general indicator of a collection of gasses present.
- Blogger "One Transistor"
- Compute ppm of MQ sensors from datasheet graphs
- The author uses WebPlotDigitizer to extract numerical data from pdf datasheet.
- Influence of temperature and humidity on MQ gas sensors
- References cited are good.
- Compute ppm of MQ sensors from datasheet graphs
- Arduino Sketches and Libraries to look through
- An excellent tutorial. With this, the datasheets make a lot more sense. Understanding a Gas Sensor
- Missing - apply temperature and humidity compensation to the measured resistive results. However, no one else has done it either.
- A collection of the MQ series datasheets
- Most of the search engine results that come up are for the MQ parts.
- I found an obsolete sensor in a broken CO Alarm TGS-203. This never showed up in my previous searches. This pdf offers more insight into what is going on.
Other references:
