SBM-20 Geiger Muller Tube Nuclear Radiation Sensor

Old Stock Geiger Counter Tube SBM-20 for Radiation Detector. Hard Beta and gamma detection tube, tested sample.
 
NOS Geiger Tube SBM20 for ionizing radiation detection. Can detect beta and gamma ionizing radiation. Full analog of STS-5. The tube has good sensitivity for natural background. SBM-20 is one of the best, cheap and robust GM tubes you can find in the market.
 
Working Voltage: 380V-480V
Dimensions of the tube are 108mm app. x 11mm app.