| 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 |