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The TEMPIL 28066 is a Tempilstik temperature indicating marker rated to 1500 degrees F (816 degrees C). It is used to verify surface temperature on metals, ceramics, glass, and plastics during welding, brazing, heat treating, and other thermal processes. The stick applies directly to a workpiece and melts instantly when the surface reaches the rated temperature, giving a clear, immediate visual indication without the need for instruments or calibration. Accuracy is within plus or minus 1 percent of the Fahrenheit rating. HVAC technicians, welders, pipefitters, and industrial maintenance professionals all rely on Tempilstik markers as a fast, reliable heat-check method.
The 28066 is suited for use across a wide range of residential, commercial, and industrial applications wherever a specific preheat, interpass, or post-heat temperature must be confirmed. Compatible surfaces include aluminum, ceramic, glass, iron, plastic, stainless steel, and carbon steel. It is particularly common in pipe welding and HVAC brazing work where proper joint temperature is critical to a sound connection.
Designed for use on aluminum, ceramic, glass, iron, plastic, stainless steel, and steel surfaces where surface temperature verification is required during thermal processing.
Temperature indicating markers require no tools or instruments for use. Apply the marker stick to the workpiece surface in the area to be checked before or during heating. Always follow applicable welding procedure specifications and safety standards when working near open flames or heated materials. Wear appropriate personal protective equipment including heat-resistant gloves and eye protection when working in high-temperature environments.
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