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A comment on FTLAB FSG-001 – A $30 Geiger Counter for Android and iOS.

Re:FTLAB FSG-001 – A $30 Geiger Counter for Android and iOS by wycx on Saturday July 30, 2016 @09:20AM (#12192861)
Any guesses on what the sensor is in this device?

The marketing material says semiconductor sensor, which is a little vague.

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Re:FTLAB FSG-001 – A $30 Geiger Counter for Android and iOS by r3boots on Saturday July 30, 2016 @10:03AM (#12192999)
Possibly one or more PIN diodes, cheap and cheerful if not particularly sensitive:

https://www.maximintegrated.com/en/app-notes/index.mvp/id/22...

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