Wouldn’t recommend this Geiger counter
Reads background levels at twice the nominal levels that my 5 other geiger counters Read it at including 3 with pancake tubes. Also slow to respond to changing levels, also the twin tubes are mounted and exposed on the sides only. So if you place the device flat on any radioactive source that Emmits Beta, it will read significantly lower than the actual amount. To compensate, you must place the device sideways on the source with one tube pointing up and one pointing down. That way the tube pointing down on the device side can accurately measure the source. Of course that makes having two tubes pointless. If you want a small pocket size geiger counter go with the Soeks defender,
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