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Comparison of GM-10 and GM-45 DetectorsBelow are graphs of data taken from a GM-10 and a GM-45, which were sitting side by side, over three and a half days. As you can see, they both show the same basic variations in readings, due to changes in the local radiation levels from background radiation, radon, cosmic rays etc. But the GM-45 shows the variations in much finer detail. For measuring typical background radiation, the GM-45 produces about five times the signal, and resolution, of the GM-10.
The difference between the two models is the size of the tube - the GM-45 has a much larger surface area tube (over 23 times as large). This means that it can detect many more particles, giving a better reading. Vist the Specs page for a full comparison.
Thinking of buying a surplus CDV-700 or 715 detector? Be sure to read our report first.