Victoreen Instrument Co.

CDV 720   model 1a   1961

 

High range instrument - 2 500 R/hr. ~ Radiation Detector ioniziaton chamber ~ Batteries 1 D cell, ~ I subminiature triode vacuum tube ~ Controls range switch circuit test, off, 0 5, 0 50 R/hr. 0 500R/hr. meter zero control ~ Yellow metal case with sliding door on bottom for beta particle detection

The bottom of the ion chamber on this meter was very thin and when the sliding door was opened it could detect (but not quantify) Beta radiation.  This meter was not very popular.

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