ORTON BARS - 022 : Box of 50
Pyrometric Bars
Small cones and Pyrometric bars are used in the Kiln-Sitter®, a mechanical switch that cuts off power in electric kilns. Small cones are occasionally used as witness cones, but caution is recommended, since these shorter cones require slightly higher temperatures to bend, as compared with Large or Self-supporting cones.
Pyrometric Bars are 1 inch (2.54 cm) Long. The uniform shape allows for more consistent control when used in Kiln-Sitter.
Temperature Equivalents use the same numbering system as small cones.
View Temperature Equivalents in either Degrees C or Degrees F chart.
Under most conditions, the small cone or bar used in the kiln shut-off device will need to be one number higher than the shelf cone or witness cone. For example, to achieve a cone 04 witness cone in the kiln a small 03 cone is generally used in the shut off device.
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