TEMTS0400 - Tempilstik 400F Temperature Indicator Crayon

Precision Temperature Indication with Tempilstik 400°F

The Tempilstik 400°F (204°C) is the industry's premier choice for accurate surface temperature measurement without the need for complex electronic equipment or calibration. Manufactured by Tempil, a leader in temperature indication technology for over 80 years, this temperature-indicating stick offers a simple, rugged, and reliable solution for critical industrial applications. It is specifically engineered to meet the rigorous demands of welding, metal fabrication, and heat treatment processes where precise temperature control is essential for quality assurance and code compliance.

Operating on a phase-change principle, the Tempilstik 400°F is designed to instantly melt and turn into a liquid smear once the surface reaches the rated temperature of 400°F. This visual cue is unmistakable and provides an immediate "go/no-go" result, ensuring that operators can verify pre-heat, interpass, and post-weld heat treatment temperatures with confidence. Unlike infrared thermometers which can be affected by emissivity and reflection, or contact probes that require calibration, the Tempilstik relies on the immutable laws of physics, guaranteeing an accuracy of +/- 1% of the rated temperature.

For industrial facilities and quality control managers, the Tempilstik represents a low-cost, high-value tool. It is fully traceable to NIST standards, making it suitable for use in regulated industries such as nuclear power, aerospace, and military defense. The stick is free of lead, sulfur, and chlorides (low-corrosion formulation), ensuring it does not contaminate the base metal or compromise the structural integrity of the weld. Whether used for annealing, stress relieving, or monitoring operating temperatures of bearings and motors, the Tempilstik 400°F delivers consistent performance in the harshest shop environments.

Each stick comes in a durable, slip-resistant aluminum holder that protects the indicator and allows for easy handling, even when wearing heavy welding gloves. The dense crayon-like material is long-lasting, providing hundreds of measurements per stick. By integrating Tempilstik into your thermal management procedures, you ensure compliance with AWS D1.1 and other welding codes that mandate specific temperature ranges to prevent hydrogen-induced cracking and ensure proper metallurgical properties.