TEMTS0250 - Tempilstik 250°F Temperature Indicator Crayon

Reliable Temperature Monitoring for Industrial Fabrication

The Tempilstik 250°F (121°C) is the original temperature-indicating stick, trusted by industrial professionals for decades to provide accurate, instant, and low-cost surface temperature measurement. In the demanding environments of welding, metal fabrication, and foundry work, relying on electronic gauges can sometimes be risky due to battery failures or calibration drift. The Tempilstik eliminates these variables, offering a purely physical and chemical reaction that you can trust every time. When the workpiece reaches 250°F, the mark made by the stick instantly melts into a glossy liquid, providing a clear visual signal that the target temperature has been achieved.

Designed for precision, the Tempilstik is engineered to be accurate within +/- 1% of its rated temperature. This level of precision is critical for adhering to strict welding codes such as AWS D1.1, ASME Code Sec. I, III, and VIII, and ANSI/ASME Code B31.1 and B31.3. Whether you are monitoring pre-heat temperatures to prevent cracking in high-strength steels or ensuring interpass temperatures remain within specification during multi-pass welding, this tool provides the assurance needed for code-compliant work. The stick is traceable to NIST standards, making it a valid tool for quality control documentation in certified shops.

The TS250 model comes in a rugged, slip-resistant aluminum holder that protects the indicator from breakage during transport and use. The holder features a convenient pocket clip, ensuring the tool is always within reach on the shop floor. Unlike infrared thermometers which can struggle with reflective surfaces (emissivity issues), the Tempilstik makes direct contact with the base metal, ensuring that the reading reflects the actual surface temperature rather than ambient interference. It is an indispensable tool for maintenance, repair, and operations (MRO) teams, ensuring that heat-treating processes and operating temperatures are monitored effectively.

At Josef Gas, we understand that consistency is key to quality manufacturing. The Tempilstik 250°F is formulated to be free of lead, sulfur, and halogens, making it safe for use on stainless steel, nickel alloys, and other sensitive metals where contamination must be avoided. Its simplicity reduces training time—operators simply mark and watch—making it a universally effective solution for thermal monitoring across diverse industrial applications.