Tube: VA-Z431 Geiger tube Posted By Radu Motisan on June 26, 2013 Pictures: Details: The VA-Z431 is a liquid media Geiger counter tube in test tube-version for measurement of radiation in defined liquid quantities. 3ml test volume. 20-25mg/cm2, U approx. 1000V, 10*20mm2 Datasheet: Links: