BOI-33 SBM-20 Geiger Counter Tube ex-army DIY sensitive dosimeter radiacmeter

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Seller: arturbernarduk ✉️ (15,142) 0%, Location: Leeds, GB, Ships to: AMERICAS, EUROPE, ASIA, AU, Item: 171443174212 BOI-33 SBM-20 Geiger Counter Tube ex-army DIY sensitive dosimeter radiacmeter .

BOI-33 (SBM-20 substitute) Geiger Counter Tube
Taken out of working, decommisioned military Geiger counter - may have some bumps/scratches but in perfect working order.
Perfect for a DIY project

Spec: Approx. weight 9 grams Minimum Anode Resistor 1.0 MOhm Recommended Anode Resistor 5.1MOhm Recommended Operating Voltage 400V Operating Voltage Range 350 – 475V Initial voltage 260 – 320V Plateau length at least 100 V Maximum Plateau Slope 10 (%/100 volts) Minimum Dead Time 190 Working range 0.004 - 40 mkR/s Working range 0.014 - 144 mR/h Gamma Sensitivity Ra226 29 cps/mR/hr Gamma Sensitivity Co60 22 cps/mR/hr Inherent counter background 1 cps Tube Capacitance 4.2 pf Life (pulses) at least 2*1010 Gas Filling Consist Of Ne + Br2 + Ar Cathode Material: Stainless Steel, 50 mkm Maximum Length 101 mm, Effective Length 83.5 mm Maximum Diameter 11 mm, Effective Diameter 10 mm Operating Temperature Range  from -60 to +70 C Areal Density 40 mg/cm2   Thickness 0.05 mm

  • Condition: Seller refurbished
  • Condition: Taken out of working, decommisioned military Geiger counter - may have some bumps/scratches but in perfect working order.
  • Brand: Unbranded/Generic

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