Show NEW IN HEAT measurement instrument placed many feet from the source will do the work accurately the latest infest development in hent boat measuring is an optical instrument which biffle it Is placed in operation many feet from the heat befit source will measure the temperature with a fine degree of accuracy says the popular science montal monthly y it measures heat beat at temperatures between 1200 and degrees F it Is based upon the simple physical law that the intensity of light emitted by a heated body Is directly proportional to its temperature the optical pyrometer has two semicircular fields of vision one illuminated by a small electric lamp the other by the object to lie observed the intensity of the field illuminated by the lamp Is 13 adjusted by turning the eyepiece until the line separating the two fields la Is eliminated when the corresponding temperature Is read directly from the dial any workman of ordinary intelligence can read it within ten degrees and it never comes In contact with the heated object |