Markal Thermomelt Temperature Indicator Heat Stick, 550 Degrees Fahrenheit, 5" Length

Accurate, fast, low-cost method for measuring surface temperaturesIdeal for applications such as annealing, forging, welding, bending, formingInitially the mark appears dull and chalky then quickly melts to a transparent-appearing liquidAccurate to within /- 1 percent of rated temperature33 Percent bigger and stronger; same proven reliabilityContains PTFE particles for greater sealing...