Tempilstik temperature indicators are essential tools for professionals in welding, metalworking, and heat treatment processes. Known for their accuracy, simplicity, and reliability, Tempilstiks are used to ensure materials reach or maintain specific temperatures during heating operations. Whether you’re performing preheat, post-weld heat treatment, or stress relieving, Tempilstik products help maintain quality and prevent costly errors.
What is a Tempilstik?
A Tempilstik is a temperature-indicating stick that looks like a crayon but is made from specially formulated compounds. When applied to a surface, it melts precisely at the marked temperature, providing a clear visual cue that the metal has reached the desired heat level. These tools are manufactured by Tempil, a brand trusted for decades in industrial temperature control.
Key Benefits of Tempilstik
- High Accuracy
Tempilstik indicators are accurate to within ±1% of their rated temperature. This ensures consistent results in processes where even slight temperature deviations can impact product quality. - Easy to Use
Simply mark the surface with the stick. When the temperature reaches the specified value, the mark melts, smears, or disappears—clearly showing the user that the target heat has been achieved. - No Calibration Needed
Unlike electronic temperature sensors or infrared thermometers, Tempilstiks do not require calibration or power sources, making them ideal for field use and tough conditions. - Wide Temperature Range
Tempilstiks are available in hundreds of temperature ratings, ranging from 100°F to over 2,000°F (38°C to 1,093°C), allowing for flexibility across industries and applications.
Common Industrial Uses
1. Welding and Fabrication
Tempilstiks are widely used for preheating metal before welding and ensuring that materials cool at the correct rate afterward. This helps prevent cracking, warping, and structural defects.
2. Heat Treatment
During processes like annealing, tempering, or normalizing, Tempilstiks verify that parts are heated to the correct temperatures for metallurgical changes to occur.
3. Metal Forging and Casting
Foundries and blacksmiths use Tempilstik markers to control and monitor temperatures in molten metal operations, reducing errors and improving safety.
4. Manufacturing and Maintenance
In environments like power plants, refineries, and heavy equipment manufacturing, Tempilstiks provide an affordable and dependable method for temperature verification.
Choosing the Right Tempilstik
When selecting a Tempilstik, consider the following:
- Required Temperature Range – Select the stick with the closest match to your target temperature.
- Surface Compatibility – Tempilstiks work on clean metal surfaces. Dirty or painted surfaces may affect accuracy.
- Storage and Handling – Store sticks in a cool, dry place and use the protective cap to prevent breakage or contamination.
Conclusion
Tempilstik temperature indicators offer a simple yet highly effective way to monitor heat levels in a wide range of industrial processes. With no need for electronics, calibration, or training, they are a reliable tool for welders, technicians, and engineers who need immediate, visual confirmation of temperature compliance. For consistent results and enhanced quality control, Tempilstik remains a go-to solution in temperature-sensitive operations.




















