1x TESTED SBM-20U / ???-20? Military GEIGER MULLER GM COUNTER TUBE STS-5 ???-5, US $358 – Picture 0

1x TESTED SBM-20U / ???-20? Military GEIGER MULLER GM COUNTER TUBE STS-5 ???-5, US $358 – Picture 1

1x Tested Sbm-20u / ???-20? Military Geiger Muller Gm Counter Tube Sts-5 ???-5

US $358

Sofia, Bulgaria
Jan 30th

Open on mobile:
QR code

SBM-20U / ???-20? HARD BETA and GAMMA GM DETECTOR TUBES Vintage Made in USSR during 1991 and 1992 for the Soviet Military Needs Genuine Russian Military Surplus <> TESTED with real radiation sample <> Condition - NOS, Never Used, Comes straight from the Factory Box This auction is for 1 (one) piece per bid! GENERAL SPECIFICATIONS Parameters SBM-20 / SBM-20U Gas Filling Ne + Br2 + Ar Cathode Material Stainless Steel, 50 mkm Maximum Length (mm) 108 / 101 Effective Length (mm) 91.0 / 83.5 Maximum Diameter (mm) 11 Effective Diameter (mm) 10 Connector Pin Operating Temperature Range 0C -60 to +70 WALL SPECIFICATIONS Parameters SBM-20 / SBM-20U Areal Density (mg/cm2) 40 Thickness (mm) 0.05 ELECTRICAL SPECIFICATIONS Parameters SBM-20 / SBM-20U Minimum Anode Resistor (meg ohm) 1.0 Recommended Anode Resistor (meg ohm) circuit diagram 5.1 Recommended Operating Voltage (volts) 400 Operating Voltage Range (volts) 350 - 475 Initial voltage (volts) 260 - 320 Plateau length (volts) at least 100 Maximum Plateau Slope (%/100 volts) 10 Minimum Dead Time (at U=400V, micro sec) 190 Working range (mkR/s) 0.004 - 40 Working range (mR/h) 0.014 - 144 Gamma Sensitivity Ra226 (cps/mR/hr) 29 Gamma Sensitivity Co60 (cps/mR/hr) 22 Inherent counter background (cps) 1 Tube Capacitance (pf) 4.2 Life (pulses) at least 2*1010 Weight (grams) 10 / 9 SHIPPING The item(s) will be shipped by registered regular mail unless other arrangement has been set with the buyer. Due to severe delays for the Regular mail sent to USA and Canada, we recommend upgrade to Priority for all US and Canada clients, please contact us for details! Overseas delivery typically takes 1 to 3 weeks and about a week for Europe. NOTE: If you purchase several items I will combine the shipment to reduce shipment costs. PAYMENT 1. PayPal - www.paypal.com

Condition	New other (see details) : A new, unused item with absolutely no signs of wear. The item may be missing the original packaging, or in the original packaging but not sealed. The item may be a factory second or a new, unused item with defects. See the seller’s listing for full details and description of any imperfections.
Seller Notes	“NOS, Comes Straight from the State Military Surplus”