Nuclear Instrument Chemical Corporation Model 1613A "Classmaster"  (1949 - 1952)

The “Classmaster was a count rate meter produced by the Nuclear Instrument Chemical Corporation. In 1954, the company changed its name to Nuclear-Chicago. The classmaster came as part of a kit that was designed for classroom lecture demonstrations and laboratory exercises. The accessories that came with the unit are missing: a GM tube, a set of aluminum, lead and cardboard absorbers, scattering tubes, and a calibrated range fixture.

Range: 0 – 1,500, 0 – 15,000 cpm.

High Voltage Supply: 600 – 1500 volts

Size:  9” x 10” x 14”

Weight: 15 pounds

Donated by Ron Kathren  


Nucleonics, February 1950 p 94;

Atomic Energy Commission Radiation Instrument Catalog, page MGM 16A, date July 1, 1950

The above scene featuring the Classmaster comes from the 1951 film Atomic Alert.

Museum Directory               Monitors, Scalers

Last updated: 05/10/11
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