!!May have some small tiny dents, because of storage. !!
For sale is lot of 1 new Geiger SBM-20 . Tested. With original connectors. Same as on picture. Not used.
I have a few in original boxes, the rest are not boxed. if you need manuals, please let me know - i will try to find but not much left. I have boxes 100pc. each. As tubes come in original boxes 100pc. each.
I ship with tracking number, by air mail.
My items are always packed carefully.
Technical characteristics:
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)
Please mind that the shipping may take some time (USUALLY it takes 9-14 days), but sometimes longer up to 20 days or so.
Please mind that shipping to Italy and France may take longer.
I ship with a tracking number by air mail, all my items are always packed well.
If you have any questions, please contact me.