Melting pencil mark warns of overheating
Item
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Title (Dublin Core)
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Melting pencil mark warns of overheating
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Subject (Dublin Core)
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en
Other
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Article Title and/or Image Caption (Dublin Core)
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Melting pencil mark warns of overheating
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extracted text (Extract Text)
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PENCILS whose marks will melt within one
percent of a predetermined temperature are
providing industrial and laboratory workers
with an easy and inexpensive means of
checking various surface heats. A mark is
made on the surface to be tested with a
pencil of a known temperature rating. When
the mark melts, the operator knows that the
surface has reached that temperature. The
crayonlike pencils come in 15 different rat-
ings, each of which is identified by a distinct
color, and cover a range of from 125 degrees
F. to 700 degrees F. Known as Tempilstiks,
these pencils have proved highly successful
in heat-treating operations and in checking
the surface temperatures of machinery, mo-
tors, and insulation. At above left, a Tem-
pilstik is used on a combustion tube. At
right, a pencil mark begins to melt (below)
when heat nears pencil’s rating.
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Language (Dublin Core)
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eng
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Date Issued (Dublin Core)
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1943-05
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pages (Bibliographic Ontology)
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125
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Rights (Dublin Core)
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Public Domain (Google Digitized)
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Archived by (Dublin Core)
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Matteo Ridolfi
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Marco Bortolami (editor)
Popular Science Monthly, v. 142, n. 5, 1943
