This CD V-715 High Range Radiation Detection Survey Meter has a 0-500 R per hour range. 3.25 pounds, die cast aluminum and drawn steel case, watertight, will float. Powered with one D-sized battery, continuously for 150 hours, longer if on intermittent basis.
Instrument accuracy on any of its four ranges is within +- 20% of true dose rate. Accuracy maintained throughout temperature ranges of -20 F to +125 F, relative humidities to 100% and altitudes up to 25,000'. CD V-715 Manual