uRADMonitor is a network connected monitoring station, focused on continuous Environmental Radiation Surveillance. This capability is delivered by a digital dosimeter constructed around the highly sensitive Geiger Muller tube SBM20U.
This is a uRADMonitor that I have installed outside of my apartment in Odense, Denmark. The system is currently under development by Radu Motisan from Romania.
To read much more about this project, visit the projects development page http://www.pocketmagic.net/2013/07/global-radiation-monitoring-network/ and the official site can be visited at http://www.uradmonitor.com/
Measuring background radiation with 22 CPM, the standard deviation is 3 times the square root of the count, which makes the normal range to be between 8 to 36. There should be no cause to alarm at values under 100 CPM.
Counts per minute, 1 hour integration interval over 2 days.
Counts per minute, 4 hour integration interval over 12 days.
Calculated micro Sieverts per hour
*** Note: The dose in uSv/h is only an estimation extrapolated from the CPM readings, based on Geiger tube characteristics (SBM20U)
Technical measurements from the uRADMonitor.
Inverter duty cycle