On the market of Gamma Scout is currently the cheapest device that can actually detect the dangerous alpha radiation (A also German competitor - on semiconductor technology rather than GM-tube with Micafenster - claiming such damage, but it definitely can not I've tried countless times - Wrong!)
Why did not I buy it? Because I have so many, even semi-professional equipment at home and simply was just curious.
But when I would define only one unit, would the Gamma Scout my 1st choice!
Oh yes: a star deduction gave it for the customer unfriendly power supply with welded battery.
And that the beep is to have only with rich supplement, is also an absolute no go!