Geiger tube J305 conversion factor: differences between the coefficient for source radiation power and absorbed dose. Technical note - Electronics manufacturer for IoT
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: when calculating the conversion factor for the Geiger tube pulse count, we need to be aware of what exactly we want to get as the output.
If we need to obtain the radiation power of a radioactive source registered by the counter, this is one task. It is a completely different task when we need to obtain the equivalent value of the radiation dose absorbed by the human body over a certain period of time.
We describe in detail how to calculate the coefficients in our previous publications, so we will not waste the reader’s time now. Instead, we will try to show the differences between the calculated coefficients and how best to use them for a DIY project.
The data is provided for the J305 tube. Any other Geiger tube, such as the SBM20 or LN712, can also be used in its place, since they all have a similar principle of operation except for certain nuances that we can neglect for the purposes of this discussion.
