Geiger Tube Anton 222r And Sbm-20 In Custom Case. Alpha-beta-gamma

US $56.00

Burlington, North Carolina, United States
Mar 24th

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Geiger Counter probes with custom enclosure. One Anton 222R open end probe with mica window AND SBM-20 mounted side-by-side. The Anton detects alpha,gamma and beta, and the SBM-20 detects beta and gamma. The SBM 20 has three windows on the bottom to facilitate beta readings, and the Anton open end extends slightly beyond the end of the case. Unit includes a three foot BNC cable to match the ends of the two geiger-mueller tubes. See below for specifications on both tubes. I ship same day Priority Mail and the shipping is free. Note: The two tubes in front of the unit are not part of the package. These are to show what is inside the unit. Anton 222R Open End G-M Tube Here are some specifications: 1. Gas Filling: Ne + Halogen 2. Cathode Material: Stainless Steel 3. Maximum Length: 70mm (3-3/16”) 4. Maximum Diameter: 8.7mm (11/32”) 5. Connector: Grid Cap Clip (6.25mm (1/4") for anode, 11/32" for cathode) 6. Operating Temp.: -40 to +75 C. 7. Mica Window Diameter: 6.25mm (1/4") 8. Recommended Anode Resistor: 1 Meg. 9. Recommended Operating Voltage: 700vdc (we have these working at 300vdc, so there is a wide range of working voltage.) 10. Background CPM (counts per minute): 10-15 (in the Palm Springs, CA desert area) 11. Tube Capacitance (pf): 3 12: Weight (grams): 11 Technical characteristics SBM-20 Minimum Anode Resistor 1.0 (MOhm) Recommended Anode Resistor 5.1(MOhm) Recommended Operating Voltage 400V Operating Voltage Range 350 – 475V Initial voltage 260 – 320V Plateau length at least 100 V 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) 9 Gas Filling 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 Connector Pin Operating Temperature Range from -60 to +70 C Areal Density 40(mg/cm2) Thickness 0.05 (mm)

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. ...	Brand	Various
Country/Region of Manufacture	United States
Model	Custom
Civil Defense	Radiation Detector
Type	Geiger Counter w GM Tubes and Custom Cover