MS-4 γ-selective Geiger counter
l.i.papadopol
This is a γ-selective Geiger counter from the “M” professional serie used also in demonstration devices for measuring the age of minerals by the activity of the isotope potassium-40. It’s…
2018
SI-16bg
This is equivalent to SBM20 Tech. spec.: ·Radiation determine: beta ( > 0.25 MeV) ; gamma soft/hard ·Voltage of start of counting: 280 – 330 V ; ·Operating voltage (recommended):…
AC-1 High-sens β-selective Geiger counter
This tube is very hard to find. It’s made from alluminium and glass and is a β-selective Geiger counter. It’s counts only beta’s! Tech. spec.: ·Radiation determine: (β-) beta soft/hard…