Geiger adapter

12.80 

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The Geiger Adapter has great features, consumes only 10 uA and can operate with 3.5 to 6.5 Volts. It is very little and works with any Geiger Tube, from 300 to 500 Volt.
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More info here:
http://www.theremino.com/en/technical/geigeradapter
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Out of stock