Geiger-Muller Counter SBT10A Details:The SBT-10A is a Geiger-Muller tube containing 10 separated detectors, and a huge mica window which allows detection of α, β (hard and soft) and γ radiation. Basically it for soft beta radiation by datasheet. The STB-10A tube is designed to be operated in various PROFESSIONAL radiometric devices. It has very HIGH SENSITIVITY (efficiency of registration) in comparison to other counters.Designed for registration of beta radiation with energy from 0.156 MeVGENERAL SPECIFICATIONS:Voltage of start of counting: 260-320VOperating Current each section: 0.3-1.5mkARecommended Operating Voltage: 390Plateau Length / Inclination: 80V / 0.3% / VSensitivity from Cs137: 332.5-402.3 Pulses/mkR at Source = 4mkR/sPulse amplitude - 5VResistance of base = 10(in step 10)OhmBeta radiation detection efficiency - 35%Own Background (Pulses / s): 2.17 at T=55+-3CWorking range (mkR / s): 0.003 - 20Dimensions: 88mm, 68mm, 38mmSBT-10A, SBT 10A, sbt-10a, sbt 10a, sbt10a