The Model F-4 was a field portable gamma study meter presented in 1949. It was designed for spotting radioactive ores and outcropping for uranium prospecting. It is housed in a steel case for ruggedness. It measured 8.75" x 5-7/8" x 2-7/8" and weighs 5 lbs. The Geiger counter is located in a external probe. The radiation indication was with audio headsets only. If interested please call or text 575four2zero1six2six.

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