Description
Colour-change crayons - irreversible are practical temperature indicators designed for straightforward visual monitoring at 120 °C. Once the marked surface reaches the rated temperature, the crayon mark undergoes a permanent colour change that does not reverse on cooling, giving a clear, lasting record that the threshold has been exceeded. This makes the crayons suitable for process checks, equipment qualification and routine temperature surveillance in laboratory and technical environments where a simple go/no-go indication is required. Supplied as a single piece from manufacturer ROTH SELECTION, each crayon weighs only 0,011 kg and is ready for immediate use on clean, dry surfaces. The irreversible response supports documentation of thermal exposure without electronic instrumentation, complementing other measuring tools in the temperature-monitoring workflow. Ideal for marking components, housings or test pieces that must confirm they have attained 120 °C during heating, sterilisation-related checks or thermal process validation. Compact and easy to handle, these crayons integrate smoothly into existing labware and quality-control routines for reliable, at-a-glance temperature evidence.
Key features
- Pack size: 1 pc
- Product type: Irreversible colour-change crayons
- Indication temperature: 120 °C
- Response: Permanent colour change
- Weight: 0,011 kg