Tempil 28308 Temperature Indicating Crayon 194F

Product Description

The TEMPIL 28308 is a temperature indicating crayon, part of the Tempilstik line, used to verify surface temperatures during welding, brazing, heat treating, and other thermal processes. The crayon marks a surface and melts visibly and instantly when the material reaches exactly 194 degrees F (90 degrees C), providing an immediate, calibration-free visual confirmation. Accuracy is rated within plus or minus 1 percent of the Fahrenheit rating and plus or minus 3 percent Celsius. The bullet-tip format allows precise application to workpiece surfaces before or during heating. HVAC techs, pipefitters, welders, and plumbers rely on Tempilstik crayons to confirm preheat and interpass temperatures without the need for contact thermometers or pyrometers.

The TEMPIL 28308 is suited for use on aluminum, ceramic, glass, iron, plastic, stainless steel, and carbon steel surfaces. It is commonly applied in HVAC brazing operations, pipe welding preheat verification, and industrial heat treatment quality control. The single-stick format makes it easy to carry in a tool bag or toolbox for field use. It is available as part of a broader Tempilstik range covering 116 temperature ratings from 100 degrees F (38 degrees C) to 2000 degrees F (1093 degrees C), allowing technicians to select the exact threshold needed for a given process specification.

Key Features

• Melts instantly at 194 degrees F (90 degrees C) for immediate visual confirmation
• Calibration-free operation with accuracy within plus or minus 1 percent Fahrenheit
• Bullet tip for precise surface marking before and during heating
• Compatible with aluminum, ceramic, glass, iron, plastic, stainless steel, and steel
• Part of a 116-temperature Tempilstik range from 100 degrees F to 2000 degrees F
• Compact single-stick format suitable for field and shop use

Compatibility

Designed for use on aluminum, ceramic, glass, iron, plastic, stainless steel, and steel surfaces in welding, brazing, heat treating, and related thermal applications.

Installation Notes

Applied by welders, pipefitters, HVAC technicians, and heat treatment personnel before or during heating operations. Mark the workpiece surface near the area of interest prior to applying heat; the mark will liquefy and spread when the surface reaches the rated temperature. No tools or power source are required. Store away from heat sources and direct sunlight to prevent premature softening of the crayon tip.