TEMTS0300 - Tempil Tempilstik 300F Temperature Crayon

Precision Surface Temperature Verification

The Tempilstik 300°F is the original temperature-indicating stick, engineered by Tempil to provide a simple, rugged, and precise method for surface temperature measurement. Designed for industrial environments where accuracy is paramount, this tool eliminates the complexity of electronic sensors. When the stick is stroked against a workpiece, the mark appears chalky and dry; once the surface reaches the rated temperature of 300°F (149°C), the mark instantly melts into a distinct liquid smear. This phase change provides immediate visual confirmation that the target temperature has been achieved.

Reliability is the core of the Tempilstik design. It offers an impressive accuracy of +/- 1% of the rated temperature, making it a trusted standard for critical applications in welding, metal fabrication, and heat treating. Unlike infrared thermometers which can be affected by emissivity and reflection, the Tempilstik relies on the physical melting point of its calibrated wax compound, ensuring consistent results regardless of surface finish. Each stick is traceable to NIST standards and meets the requirements of major industrial codes, including AWS D1.1, ASME Code Sec. I, III, and VIII, and ANSI/ASME Code B31.1 and B31.3.

This model is specifically formulated to be free of lead, sulfur, and zinc, making it safe for use on stainless steel, nickel alloys, and other sensitive materials where contamination must be avoided. The stick is housed in a high-density, slip-resistant aluminum holder that protects the indicator and allows for maximum usage. Whether used for preheating, interpass monitoring, or post-weld heat treatment, the Tempilstik 300°F delivers the assurance needed for quality control and process compliance.