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Pyro Optical Pyrometer (The Pyrometer Instrument Co.)


Cylindrical leather case containing an optical pyrometer. The pyrometer consists of a black cylinder with an eyepiece on the top. On the side of the pyrometer there is a scale reading in Fahrenheit from 14-25 in hundreds of degrees. On the bottom of the temperature scale there is another scale reading from 45-70 with the label “current number” underneath it. Directly underneath the labels and scales, there is a knob which can be moved up or down from 3 to 10 feet, possibly to adjust the focal distance.

Accession Number:

Alternative Name:

Primary Materials: Leather, Metal, glass, rubber


Old inventory number = phy1036. On the right side of the scales is a label “Pyro optical Pyrometer”, “THE PYROMETER INSTRUMENT CO. NEW YORK N.Y.”, “Serial No.”, and “Made in U.S.A.”. On the bottom of the pyrometer there is a label “58.6”.

Dimensions (cm):

Case: height = 26.5, diameter = 10; Instrument: height = 25.5, diameter = 7.5


For measuring thermal radiation without coming into contact with the surface of an object that is very hot or very cold.


Good: The instrumental is constitutionally intact. There are minor erosion and wear on the metal and rubber surfaces. The leather case is severely worn.

Associated Instruments:


The Pyrometer Instrument Co., New York, N.Y., USA

Date of Manufacture: c. 1940


Additional Information and References:

Historical Notes:

Company still active –