0000916127 - Tempilstik 253°C (488°F) Temperature Indicating Crayon

Precision Thermal Management for Industrial Fabrication

The Tempilstik 253°C (488°F) Temperature Indicator is an essential tool for quality control in high-stakes industrial environments. Designed to provide a definitive method for surface temperature measurement, this indicating stick utilizes the laws of physics—specifically the melting point of a calibrated chemical compound—to deliver accuracy within +/- 1%. Unlike electronic sensors that can drift or require frequent calibration, the Tempilstik remains stable and reliable, making it a trusted standard in the welding, forging, and metal fabrication industries for over 80 years.

Meeting the rigorous demands of code-compliant work, this indicator is traceable to the National Institute of Standards and Technology (NIST). It is meticulously formulated to be free of lead, sulfur, and zinc, ensuring that it does not introduce harmful contaminants that could compromise the structural integrity of sensitive alloys during the welding process. This makes it particularly suitable for use on stainless steel, nuclear components, and other critical infrastructure materials where purity is paramount.

The operation is straightforward yet scientifically robust. When the workpiece reaches the rated temperature of 253°C, the mark left by the stick—or the stick itself if stroked against the surface—will instantly liquefy. This phase change is distinct and unmistakable, eliminating operator interpretation errors common with color-change indicators. Whether used for verifying pre-heat temperatures to prevent cracking, monitoring interpass temperatures to maintain mechanical properties, or ensuring post-weld heat treatment (PWHT) cycles are achieved, the Tempilstik provides the data point necessary for metallurgical assurance.

Packaged in a durable, adjustable aluminum holder, the stick is protected from breakage and easy to handle with gloved hands. The holder also features a pocket clip, ensuring this critical gauge is always within reach of the inspector or technician. For industrial operations prioritizing adherence to AWS D1.1, ASME Code, and API standards, the Tempilstik 253°C is a mandatory asset in the quality assurance toolkit.