&Nbsp; This product requires the seller’s permission before being taken, otherwise it will not be shipped. The reason is that the technical characteristics are high.
The model screen printing is:;SBM-20.
| 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 |
| Parameters | SBM-20 / SBM-20U |
| Minimum Anode Resistor (meg ohm) | 1.0 |
| Recommended Anode Resistor (meg ohm) | 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 |
Selection guide:
GMV2&;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp Volume: 135*70*25mm
Wavesnbsp; Weight: 168 grams; Use: portable, canDetect X γβ radialFor household and industrial use
型号:GMJ3 & ampnbsp & ampnbsp & ampnbsp & ampnbsp & ampnbsp & amp不间断空格 host machineVolume: 135 * 70 * 25mm;
Volume of split geiger tube: 220mm in length and 26mm   diameter. Weight: 240g
Usage: portable, industrial, household, highly radioactive research, medical use,canDetection of Xγβ rays
Model: GMV2s Geiger tube is compatible with GMV2GMV2All functions.
Added: 1) Time recording 2)Curve with real-time radiation value 3)and computer communication functions
4) More alarm setting functions 5) On-board 2.4-inch high-definition TFT color screen
Popular science:
There are three types of nuclear radiation rays in nature: γ (Gamma) β (Beta) α Alpha ray
X-rays are ionizing electromagnetic waves with wavelengths between ultraviolet and γ (gamma) rays.
Model: GMV2 and J3 handheld Geiger counter can measure γ (Gamma) β Beta radiationX-rays
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