To answer your question, I reached out to Patrick King, the founder of Technologies ROI (TROI), a provider of heat-resistant and durable tags. Pat says there are currently no tags on the market that can withstand 1,800 degrees Celsius.
“For the moment,” Pat states, “TROI’s direct-mounted tags are certified to 300 degrees Celsius (572 degrees Fahrenheit). We will soon be releasing a new tag that can withstand up to 400 degrees Celsius (752 degrees Fahrenheit). If the steelmaker can provide even a short distance between the heat source and the tag, then 400 degrees might work. The temperature falls off faster than most people can believe. I have a customer, for example, that has smelting ladles, and the core heat is 760 degrees Celsius (1,400 degrees Fahrenheit), but just a few inches from the source, the temperature falls to 370 degrees Celsius (700 degrees Fahrenheit), which is safe for current TROI tags.”
Pat says he could develop a custom tag to meet your needs, but notes that “it would not be small—and it would be expensive.”
—Mark Roberti, Founder and Editor, RFID Journal
Can I Use RFID in the Hospitality Industry? »