Nucleonic Company of America "Orelokator" GM Survey Meter (ca. 1955-1960)

Nucleonic Company of America "Orelokator" GM Survey Meter (ca. 1955-1960)

The Model RM2N GM survey meter, also known as the "Ore-Lokator," was produced by the Nucleonic Company of America (NCA) of Brooklyn New York. The following description (1954) is from an NCA advertisement in the November 1954 issue of Nucleonics: "The NCA Ore-Lokator's many unique features include: A patent pending means of checking accuracy of meter reading which makes this the only really reliable and accurate survey instrument. An electronic battery operated circuit that assures constant geiger tube voltage largely independent of the battery voltage - another essential feature for reliable instrument operation. Low drain circuit giving exceptionally long battery life—approx. 400 hours."

What is somewhat unusual about this particular example is that the case is chrome metal, something more characteristic of the instruments produced by Precision Radiation Instruments than the instruments of NCA. The OreLokator illustrated in the 1954 Nucleonics advertisement and that shown in the 1954 Atomic Energy Commission's instrumentation catalog supplement have painted cases and look exactly like the NCA Model RM2.

Nucleonic Company of America "Orelokator" GM Survey Meter (ca. 1955-1960)

Detector: GM tube


  • 0-500, 0-5,000 and 0-50,000 cpm
  • 0-0.25, 0-2.5 and 0-25 mR/hr

Audio: No speaker but has jack for headphones

Batteries: Three 1 1/2 volt D cells, plus two 67.5V cells

Size: ca. 4” x 8” x 4 1/2” (without probe)

Price: $149.50 in 1954 for the RM2N

This example came with a leather case and set of headphones (not shown).


  • Advertisement for Model RM2N. Nucleonics. November 1954. Page 112.
  • Atomic Energy Commission. Model RM-2N. Radiation Measuring Instruments, RIB-8 (supplement 2). July 1, 1954. Page SGM-87A.