This CD V-717 High Range Radiation Detection Survey Meter has a Range of 0-500 R/Hour.
5.25 pounds, 3-part die cast aluminum 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. Use of remote cable (25') should not degrade accuracy more than 5%. Detachable bottom section, containing ion chamber, can be set up for remote sensing with included cable.