2X2 NaI detector used for measuring very low levels of gamma radiation.  Can be used with a standard meter with HV adjustability.  If you have a specific connector you want, let us know.

Typically paired with an instrument like a Ludlum Model 2221, 2350, or 2360 for walkover surveys.

Can be used to screen for low levels of radioactivity.

Can readily measure variations in background radioactivity.

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