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

Nuclear Instrument and Chemical Corp. "Classmaster"

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.