Smart Geiger EX

It does work, although the built in calibration is wrong. So far I have sent 3 of these off for calibration to a national standard and they all have been underestimating the value; all have a negative deviation of around 77% of what the actual value should be in µSv / h. I have not tested yet and do not know if these are in any way energy compensated to actually provide a value in µSv/h. So on the safe side so far I have found for a proper conversion from the CPM value given by the app to µGy/h is around 1.72 ± 0.09. I could not find any way within the app to actually change the gain, but if anyone knows a way to do this please let me know as this would allow for correct readings.

Very simple app but it does work.complaints...no audio click is available in settings. Very slow response. Why are there timers? This should function as a ratemeter (CPM, mR or uS/hr) or a dosimeter (uS or mR or total counts). I think the device is so insensitive, the long time filter is necessary. I used a Thorium mantle that measured 15000 CPM using a 44-9 probe and only produced about 9 counts over a minute ( got up to 12CPM after sever minutes. Smart Geiger Pro doesn't work at all.

Ok device. Like the sound reminds me of voyage to bottom of the sea. Would prefer a continuous reading as well as the duration reading. Pretty good for what it goes.