What Are the Different Types of Civil Defense Survey Meters?
Amongst the Civil Defense Survey Meters there are four primary types, one low-range meter and three high-range meters. (There was one other high-range meter, the plastic encased CD V-710, that we don’t see much of anymore and will not be including it here.) The following three survey meters are the most common Civil Defense high-range meters. The detector on all these high-range survey meters is an ionization chamber. It measures gamma radiation. The R/hr in the ranges indicated below refers to Roentgen per hour exposure rate. They each have a 1-5 numbered meter range and four multiplier scales: X100, X10, X1 and X0.1, with the exception of the CD V-720, that does not have the X0.1 scale. The CD V-715 and CD V-717 with the multiplier scale, X0.1, provides that the 0 – 5 range would be read as 0 – .5 R/hr when it’s selected. The other differences between the three units is that the CD V-717 includes a 25′ cable for remote sensing and the CD V-720 employs a sliding beta shield on the bot
