NEW (NOS) SBM-20 Geiger-Muller counter tube.
Tested for workable.
One counter in one lot.
We ship via International Airmail from Post Office in Kyiv.
Tracking number is provided.

Important notice for buyers from Canada -shipping to central and western provinces of Canada may take up to 2 months! 

Important information for buyers from Australia, Oceania, Central Africa and South America: due to increased shipping cost to these regions, shipping price is calculated individually. 

!!!Dear buyers, despite the treacherous Russion invasion of Ukraine, 
we are working!!!
 
Some minor delays in the delivery may happen.

The Geiger-Muller counter SBM-20 is designed to measure hard beta and gamma radiation for wide application in the field of radiation monitoring.
Technical characteristics of Geiger-Muller counters SBM-20:
Radiation source - Cs;
    Sensitivity to gamma radiation:
    EDR - 4.0 µR∙s-1;
    67.5 µR-1±7.5 µR-1;
    The rated operating voltage of the device Geiger-Muller counter SBM-20 is 400V;
    Counting voltage - 260V-320V;
    The length of the counting characteristic is not less than 100V;
    The slope of the counting characteristic is no more than 0.1%/V;
    The intrinsic background of the device Geiger-Muller counter SBM-20 is no more than 1.0 s-1;
    Maximum operating DER - 1400 s-1, 40 µR∙s-1, k.n. ±20%;
    The maximum permissible DER is not less than 360R∙h-1;
    Dimensions - 11x11x108mm;
    The weight of the Geiger-Muller counter SBM-20 is 10g.