Hi Nudnik,
its a nice community here. I see you use a GMC320. I have one too and regularely monitor radiation levels in planes when traveling for business. I like this unit very much, because there never was any discussion with security.
But my stationary counter now uses a SBM-19 tube. This tube is relatively big and produces approx. 100 counts/min. So do not wonder if you see high counts on my station!
