RCL Mark 1 Model 105 GM Tube (ca. early 1950s) |
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| The Radiation Counter Laboratories Mark 1 Model 105 is described as a "miniature end window search counter." Its thin window permits the detection of alpha, beta and gamma radiation, and its small area permits the precise localization of small areas of contamination. The price? $65 in 1952. | |
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Size: 3 1/4" long, 3/4" diameter Wall: glass Window: 7 mm diameter and 1 - 2 mg/cm2 thick Cathode: Inner surface of glass wall coated with aquadag Operating voltage: 850 volts Gas: organic quenched |
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Reference AEC Radiation Instrument
Catalog, page date AEC Radiation Measurement Instruments, RIB-8 (supplement 2) July 1, 1954. Nucleonics May 1952, page 89. |
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