Irreversible Temperature Indicating Labels

Apply And Forget Until You Inspect

CelsiStrip®    CelsiClock®     CelsiDot®    CelsiPoint® Temperature Recording Labels for

  • low cost temperature monitoring
  • reliable way of recording temperature history of any surfaces
  • irreversible
  • self-adhesive
  • temperature values from 40°C to 260°C
  • different sizes and temperature combinations
  • easy application

Exceeding the specific temperature rating of an indicator spot (level) will permanently change its original white colour into a dark black one. Not blackened indicator spots have not been exposed above their specific rated temperature level.

CelsiStrip® irreversible Temperature Recording Labels permanently and dependably measure and record the maximal temperatures history on any surface, even if it is on a disk brake saddle of a Porsche® HiPe racing car. Do you know a simplier, less complicated and more economical solution to record under actual driving conditions such temperature maximum values? ... we don't.

All items are always fully stocked. In an urgency materials can be „fedexed.. ups‘d .. dhl‘d“ within an hour after receipt of PO.

Certain applications might be solved by our irreversible thermo-sensitive melting crayons CelsiStick® serving temperature ranges from +40 °C to well above +1000 °C.

Please ask for a FREE, rich populated Celsi® Sample Kit: celsi{at}

Types of Celsi...®


Reversible Temperature Labels CelsiReverso®

  • reversible
  • temperature range from 0°C to 120°C
  • different sizes and temperature values
  • reliable
  • easy to use

Liquid-Crystal Thermofoils and Thermometers

ThermoDot® and ThermoStrip®

Irreversible Temperature Indicating Thermo-Crayon CelsiStick®

  • easy to use
  • temperature range from 38°C to 1343°C
  • temperature indication depends on defined physical melting process

The function of the irreversible (not reversing) temperature indication of the CelsiStick® depends entirely on the melting process of materials (compounds) with a precise defined melting point or melting range. Melting identifies the specific temperature level and not a discoloration of the applied mark.