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CV2145 GM tube

This valve measures 190x26mm overall

This is a liquid counter designed as a substandard for the measurement of isotopes with β-energies above 0.4MeV. It consists of a thin-walled counter tube inside an outer tube which can be filled with approx 10ml of liquid. (Whitehouse, W.J., and Putman J.L., Radioactive Isotopes: an introduction to their preparation, measurement and use, (Clarendon press, Oxford, 1953), p200)

Information is needed about this device. It is marked Vω 1135, serial no. 8333.341


The central terminal is the anode and the terminal to the side is the cathode.