Markal Thermomelt 650°F / 343°C Temperature Indicator

Markal Thermomelt temperature-indicating stick melts when the surface reaches 650°F (343°C), providing immediate visual confirmation without sensor calibration. Suitable for welding preheat, interpass monitoring, post-weld heat treatment, stress relief and annealing. Sold by the stick; 12 per box.

• When the stick melts, the precise temperature is reached
• Long-lasting stick is 33% bigger than competition
• Accurate to within +/- 1% of Fahrenheit and +/- 3% Celsius rated temperatures; no need for sensor calibration
• Ideal for: pre-heating, post-weld heat treating, interpass temperature monitoring, stress-relieving and annealing
• Protective holder, shirt-clip and adjustment ring prevents breakage and improves handling
• Meets welding codes: AWS D1.1, ANSI/ASME Code B32.1 & B31.3, ASME Code Sec. I, III, and VII, NIST Traceable

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Specifications