SpotSee® Thermax irreversible temperature labels give a permanent, at-a-glance record of the highest temperature a component, machine or process has reached. Each window changes colour once its rated temperature is exceeded and does not change back, so overheating is never missed, even after the equipment has cooled down. Available in multi-level, mini, micro and precision formats, they are used for preventive maintenance, quality control, process validation and warranty evidence across engineering, electronics, automotive and manufacturing.