TEMTS0500 - Tempil 500°F Temperature Indicating Crayon

Precision Thermal Monitoring for Industrial Applications

The Tempilstik 500°F (260°C) represents the industry standard for surface temperature measurement, leveraging over 80 years of phase-change technology development by Tempil. Designed for critical industrial applications where thermal precision is non-negotiable, this temperature-indicating stick offers a reliable, low-cost alternative to electronic pyrometers and infrared thermometers. Unlike electronic devices that can drift out of calibration or suffer from emissivity errors on reflective surfaces, the Tempilstik relies on the immutable laws of physics: the melting point of its formulated compound is fixed and precise.

When the workpiece reaches 500°F, the dry, opaque mark left by the Tempilstik instantly liquefies into a distinct, transparent smear. This phase change is accurate to within +/- 1% of the rated temperature, making it compliant with stringent codes such as AWS D1.1, ASME Code I, III, and VIII, and ANSI/ASME Code B31.1 and B31.3. This level of accuracy is essential for quality assurance in processes like preheating, post-weld heat treatment (PWHT), annealing, and stress relieving.

The TS0500 is engineered to be free of lead, sulfur, and halogens, ensuring it will not introduce contaminants that could lead to weld cracking or corrosion, particularly in stainless steel or nuclear applications. Each stick is traceable to NIST standards, providing the documentation trail required for ISO certified operations. The product is housed in a rugged, slip-resistant metal holder that protects the stick from breakage and allows for easy handling even while wearing heavy industrial gloves.

Technical Reliability

In environments where electronic interference or battery failure is a concern, the Tempilstik remains operational. It requires no setup time and provides an immediate "go/no-go" result. This simplicity reduces the margin for operator error and ensures that critical temperature thresholds are met consistently across production runs.