THERMAX Temperature Label

Thermax Standard Portfolio products offer irreversible temperature recording to help monitor the highest temperature reached. These are self-adhesive labels that change in color from silver to black. Options include level strips, mini strips, encapsulated indicators, level microstrips, and clock indicators.

Thermax® Irreversible Temperature Recording Strips

Product Description: A series of temperature test labels that will permanently record
the highest temperature reached by the label.

Temperature Indicator Labels, Thermometers, Temperature Stickers, More


  • Permanent Record of Highest Temperature Reached
  • Self-Adhesive Labels
  • Silver to Black Color Change
  • Immediate Response
  • Oil, Water and Steam Resistant
  • Inexpensive and Easy to Use
  • Product Line Temperature Range
    • 84 to 554°F / 29 to 290°C
  • Accuracy
    • Less than 100°C is +/- 1°C
    • 100°C to 154°C is +/- 1.5°C
    • Greater than 154°C is +/- 4°C

These self-adhesive labels consist of a series of temperature-sensitive elements sealed between
heat-resistant substrates with transparent windows. Each element changes color distinctly as its
rated temperature is exceeded. The changes are irreversible, providing a temperature history of
the surface being monitored. The labels will not de-laminate when removed for reference and
can be attached to an inspection report to serve as a permanent record.

How the labels work:

The temperature-sensitive elements are phase-change indicators which use the sharply defined
melting points of a series of specially purified organic chemicals to give the unique, high
precision, color change effects. Each temperature element uses a different chemical compound
and is made separately by applying a coating containing the chemical to a special absorptive
paper substrate. When the rated temperature is exceeded, the chemical melts and is absorbed by
the substrate, causing a permanent color change. Up to ten elements can be combined together
on a single label.

Instructions for Use:

Peel indicator from the release paper
Apply to any clean, grease-free surface ensuring that the indicator has adhered to the
A color change from silver white/orange to black indicates that the temperature has been
Storage Conditions:
Products 120ºF/50ºC or below: Store in a refrigerator inside a sealed bag
Products above 120ºF/50ºC: Store at room temperature & humidity (i.e. 20ºC/68ºF &
50% relative humidity)