Orton Bars - 1

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ORTON BARS - 1 : Box of 50Pyrometric 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 o ccasionally 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. Show more