Nuclear Measurements Corporation was started in 1948 by Wendell Bradley, Herb Fall and Bernard Shurts. They advertised "Designed and manufactured by Nuclear Scientists with world wide reputation" and "Manufacturer of the World's Finest Radiation Instruments". Their first product was the internal proportional counter introduced in 1948. The internal proportional counter is one of the most significant contributions to the nuclear industry. It was located at 3339 Central Avenue in Indianapolis, Indiana in 1949 and offered no radiation detectors. They began offering a line of survey meters in 1952. They moved to 2460 North Arlington Avenue in the 1950's. They produced meters that were eventually adapted for the civil defense programs in the late 1950’s. NMC had the first contract to produce Civil Defense instruments for the government. NMC and Victoreen jointly produced many of the follow on contracts for more CD instruments.

Production of survey meters continued until 1956. In 1955, they relocated to 2460 N. Arlington Avenue in Indianapolis, Indiana and offered a geiger counter and a scintillation counter. The Model GS-3 geiger counter was offered in 1955 and sold for $99. The unit was originally designed for military use and is designed to military specifications. It weighs 4.5 lbs and is 7” x 3.5” x 3”. It uses three miniature B batteries and two small D batteries. Life expectancy is 300 hours. It is metered for 500, 5000, and 50000 counts per minute. It rugged construction showed no damage after a 5’ fall on concrete. The probe could be disassembled for easy cleaning.

The Model GS-1 was a compact and versatile with a built in GM tube for beta and gamma detection. The unit had ranges from 0-500, 0-5,000 and 0-50,000 cpm. It was 3-1/4" x 6-1/2" x 7-7/8" and weighed 4.5 lbs. It sold for $99.50 in the 1950's.

Nuclear Measurements Model GS-1 1955

Nuclear Measurements Model GS-1 1955

Nuclear Measurements Model GS-1 Ad 1955

The Model GS-2 was similar size and weight to the GS-1 but had two built in GM tubes. It sold for $199.50 in the 1950's.

Nuclear Measurements Model GS-2 Ad 1955

The Model GS-3 was introduced in 1955 as a beta gamma survey meter. It has three ranges from 0-500, 0-5,000 and 0-50,000 cpm. It was a geiger counter that was waterproof and shock resistant. The manufacturer stresses compact, rugged construction. It had an external probe that could be readily disassembled for cleaning. The unit exceeds CDV-700 specs and is smaller and lighter. It was 3-1/4” x 6-1/2” x 7-7/8” and weighed 4-3/4 lbs. It sold for $149.50.

Nuclear Measurements Model GS-3 1955

Nuclear Measurements Model GS-3 Ad 1955

The Model GS-3CD was introduced in 1955. It exceeds the CVD-700 specifications in size, weight and ruggedness. It detects betas and gammas with three ranges from 0.5, 5, and 50 mR/h. It uses two D-cell flashlight and three 445V miniature batteries.

The Model GS-3 was a portable beta-gamma survey meter. I measured 7” x 3” x 3.5”.

Nuclear Measurements GS-3

Nuclear Measurements Model GS-3 1959

The Halotron  15, also known as Model GS-4, was a super sensitive GM counter offered in 1956. It had 15 GM tubes for locating deep hidden uranium ore. It was advertised as being more sensitive to gammas than some scintillation counters. The unit was 3-1/4" x 8" x 7-7/8" and weighted 4-3/4 lbs. It was waterproof and shockproof, withstanding a 5' drop on concrete. 

Nuclear Measurements Halotron 15 1956

Nuclear Measurements Model GS-4 Ad 1955

Nuclear Measurements Popular Science Ad 1955

The Model SS-2 and Model SS-3 were introduced as scintillation counters with internal detectors. The Model SS-2 has a 1" x 1" NaI crystal and the Model SS-3 has a 1-1/2" x 1" crystal, and sold for $399.50 and $499.50, respectively. The case was 3" x 5-1/4" x 7" and weighed 4.5 lbs. The Model SS-2 is 100 times more sensitive to uranium than the Model GS-3 Geiger Counter. The Model SS-3 is 225 times more sensitive. It was advertised for "Detection in all Directions, not necessary to aim our scintillation counter like a pistol".

Nuclear Measurements Model SS-2 Ad 1955 

The scintillation counter started at $399 in 1955. It had an internal scintillation detector and an external gamma/beta probe.

Nuclear Measurements Model SS-2

The Model SS-3 is a scintillation detector.

Nuclear Measurements Model SS-3

The Model SS-4 Scintigron Scintillation Counter was the most versatile of all field type survey instruments. It had a 1-1/2" x 1" NaI crystal. It was 3-1/4" x 8" x 7-7/8" and weighed 4.5 lbs. It was waterproof and could withstand immersion for 15 hours. It has ranges from 0-10,000, 30,000, 100,000, 300,000, 1,000,000 and 3,000,000 cpm. The detectors are rubber shock mounted and the instrument could be opened with a book type hinge.

Nuclear Measurements Model SS-4 Ad 1955