Buy Temperature Indicators Online in Australia
Temperature Indicators for Australian Welding, Heat Treatment and Process Monitoring
Temperature indicators are the consumable products that change colour or melt at specific temperatures — providing visual confirmation that workpieces, welds, or equipment have reached or stayed below specified thermal conditions. For Australian welders monitoring pre-heat and inter-pass temperatures, heat treatment operators verifying soak temperatures, and process monitoring teams confirming equipment operating temperatures, the right temperature indicator is the simplest and most reliable verification method. AIMS Industrial supplies Tempilstik and approved temperature indicating products.
The temperature indicator types we stock
- Tempilstik temperature crayons — wax-form crayons that melt at specific temperatures; mark the workpiece, melted crayon confirms temperature reached
- Tempil temperature paints — liquid paints that change colour at specific temperatures; brushed onto the workpiece
- Self-adhesive temperature labels — peel-and-stick labels with multiple temperature dots that change colour irreversibly
- Reversible temperature indicators — for monitoring real-time temperature variation (return to original colour when cool)
- Continuous monitoring strips — for sustained process monitoring
Where temperature indicators earn their place
- Welding pre-heat verification — confirming workpiece pre-heat temperature before structural and high-grade welding
- Welding inter-pass temperature monitoring — keeping inter-pass temperature within specification during multi-pass welding
- Heat treatment verification — confirming soak temperatures during stress relief, hardening, tempering
- Equipment monitoring — verifying motors, bearings, and process equipment haven't exceeded operating temperature
- Process control — visual verification of process temperatures in manufacturing
- Safety verification — confirming surfaces are below contact-temperature thresholds before maintenance
Why use temperature indicators
Compared to thermocouple and infrared temperature measurement, indicating crayons and paints are simpler, more economical, and require no equipment. The melted mark or colour change provides permanent visual confirmation that the temperature was reached — useful for documentation, quality control, and inspection. For welding pre-heat verification across long structural welds, marking the workpiece with multiple temperature crayons (one slightly below required pre-heat, one slightly above) provides clear go/no-go indication that thermometer measurement can't deliver as easily.
Temperature ranges available
Tempilstik crayons cover temperatures from approximately 50°C through 1000°C in standard increments. Common ranges for welding pre-heat work: 100°C, 150°C, 200°C, 250°C, 300°C. For heat treatment: 400°C, 500°C, 600°C, 700°C. For high-temperature process work: 800°C through 1000°C. Each crayon is rated for a specific temperature; the rating is printed on the crayon and packaging.
How to use temperature crayons
Mark the workpiece by drawing a line with the crayon — the crayon leaves a wax mark. As the workpiece heats, the mark remains solid until the rated temperature is reached, then melts cleanly. The melted mark provides permanent visual record. For pre-heat verification, mark the workpiece with the required pre-heat temperature crayon; as the workpiece heats during pre-heat, monitor the mark until it melts to confirm temperature reached. For do-not-exceed monitoring, mark with the crayon at the maximum allowable temperature; if the mark stays solid, temperature stayed below the limit.
Brands stocked at AIMS
Tempilstik (Tempil) is the established brand for industrial temperature indicators — long product history, broad temperature range, and reliable performance. Other approved brands fill specific roles in the broader range. For specialty temperature indicators or specific applications, sourcing through our distribution channels covers most options.
Calibration and storage
Tempilstik crayons are calibrated to ±1% of rated temperature. Storage in normal workshop conditions doesn't affect calibration; freezing or extended high-temperature storage can. Use within shelf life (typically 3-5 years) for guaranteed accuracy.
Companion ranges at AIMS
Temperature indicators sit alongside our broader welding and process monitoring range — see stick welding accessories, TIG welding accessories, measuring tools, and temperature screening devices for the related products.
Need help speccing temperature indicators for welding, heat treatment, or process work? contact our team — we'll match temperature range and indicator type to your application.