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Three Channel Gamma-Ray Spectrometer

Geophysics · Physics

A grey metal enclosure with a rectangular footprint and rounded edges opens to reveal an instrument console. The enclosure has a folding handle at the top centre. On the right and left sides of the enclosure are red “fragile” stickers.

Inside the instrument is a half-cylinder recess that houses a cylindrical component. This attaches to a jack on the console using a short cable, which is also contained in the case.

The face of the console can be removed by loosening four screws near the four corners of the console face. Five jacks labelled “Analyser Outputs” are revealed by lifting the console face free of the enclosure.

Accession Number:

Alternative Name:

Primary Materials: Aluminum Alloy, Iron Alloy.


Printing on the console face includes the following information: “Model No NE 972”; “Patented 1966 No. 745,708”; “NOT LICENSED FOR USE IN AIRCRAFT OR BORE HOLE LOGGING”.

A paper tag containing scientific values is taped to the inside lid of the case.

“Falconbridge Nickel Mines Limited” is stamped on several locations on the case and console.

A tag is tied to the handle on the top of the enclosure. It includes the address and telephone contact information for Mike Penstone at Falconbridge Nickel Mines Limited. Penstone’s name replaces the name “Wilfreid Meyer”, which has been canceled with a blue pen. The take lists the date “April 28/78” and notes “Received @ Sudbury from Timmins Office.”

A second label is taped to the lid of the instrument. This reads “only MODEL NE 972 SPECTROMETER SER. No. 745708”.

A receipt for a repair and calibration, carried out by Spectronics in Willowdale, Ontario, and dated June 22, 1976, was found in an envelope at the bottom of the instrument case.

Dimensions (cm):

Box: Height = 22, Width = 41, Length = 23.


This instrument is used to identify radioactive minerals, liquids, gases, and other substances. It incorporates a scintillating crystal and photomultiplier to detect the characteristic radiation of three radioactive elements: thorium, uranium, and potassium.


Good: The inside of the instrument is in generally very good condition. The outer surface finish is chipped and damaged. The paint is peeling.

Associated Instruments:


Nuclear Enterprises LTD. Winnipeg, Manitoba.

Date of Manufacture: c. 1966-1970s


This instrument was gathered from Room 007A in the McLennan Subbasement on March 21, 2019.

Additional Information and References:

Historical Notes:

  • Donated to UTSIC