V O L U M E 2 3 , NO. 12, D E C E M B E R 1 9 5 1
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For accurate temperature measurement, use meters calibrated for C h r o m e l - A l u m c l thermocouples Wherever accurate temperature measurement is important to the finished quality of work . . . in laboratory analysis or on heat treat operations . . . you'll find that nearly always the pyrometers in use are calibrated for Hoskins CHROMEL-ALUMEL thermocouple alloys. And for g o o d r e a s o n s , t o o . Because CHROMEL-ALUMEL thermocouple wire carries a positive accuracy guarantee . . . ± 5° F. at temperatures up to 660° F., and + %% from 660° F. and over. It's highly responsive to temperature fluctuations . . . so resistant to oxidation that you need not pack the protection tube . . . and it maintains its
fine accuracy over longer periods of time than any other base metal thermocouple material. So if you're responsible for accurate temperature measurement, better check your pyrometers to make sure they're properly calibrated, then specify couples by name . . . CHROMEL-ALUMEL thermocouples. Available through your instrument manufacturer or pyrometer service company. P S - A n d while you're at it . . . complete your chain of accuracy with CHROMELALUMEL "extension" leads. For, by using wires of identical compositions for both couples and leads, you eliminate all possibility of "cold-end" errors.
Complete technical information is contained in our Catalog 59-R... want a copy?
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W e s f C o a s i Representatives In Canada: Walker Metal
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kel-chromium resistance alloy that first made electrical heating practical
