United Process Controls, Inc.
Oxyfire-LT Installation/Operation Manual
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P a g e
2.5
WALL THICKNESS
Verify the exact thickness of the refractory in the crown or wall. A length of high temperature metal
wire, formed like an “L”, should be inserted into the refractory hole. Hook the lengths of wire against
the inside face of the refractory and mark the outside face of the furnace on the wire. Check the
dimension at several points around the circumference of the hole. This will indicate possible erosion or
build-up. Transfer this mark to the sensor sheath. Next mark 1 inch (25mm) increments along the length
of the sensor sheath starting at the tip.
