We have previously written about how to calculate the coefficients for the SBM20 tube and the J305, tube that come with our Geiger counter module GGreg20_V3 for DIY / IoT projects.
However, in those articles, we focused heavily on the calculation formulas and almost overlooked a very important detail...

Read the full article:

https://iot-devices.com.ua/en/geiger-tube-j305-conversion-factor-difference-for-radiation-source-power-and-absorbed-dose-technical-note-en/