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ostaquet / Arduino-MQ131-driver

Arduino driver for gas sensor MQ131 (Ozone / O3)
MIT License
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Collection of data points in the data sheet to define equation #42

Closed JosephJohnZ closed 3 years ago

JosephJohnZ commented 3 years ago

Hello once again, I was wondering how you got the data from the datasheet of the sensor, because the datasheet doesn't seem to provide actual numerical values in the graphs, did you eyeball it?

ostaquet commented 3 years ago

Indeed the data sheet doesn't provide any numerical values.

The trick is:

  1. Open the PDF of the data sheet and zoom on the chart.
  2. Screenshot the chart.
  3. Prepare an Excel sheet with the data points you need.
  4. Make a chart in Excel and put the screenshot on the chart with some transparency.
  5. Adjust the data point to match the screenshot

Not 100% accurate but quite close to the values of the original chart ;-)