Which statement about thermometers is incorrect?

The statement regarding the use of either alcohol or mercury as an indicator in thermometers is incorrect. While both alcohol and mercury have historically been used in thermometers, the use of mercury has declined significantly due to safety and environmental concerns. Many modern thermometers utilize digital sensors, bimetallic strips, or other non-toxic substances instead of mercury or alcohol.

When discussing thermometers, the importance of size pertains to their application; certain sizes are suited for specific tasks or environments. Calibration verification is critical to ensure accurate measurements, especially in laboratory settings where precision is vital. Keeping records of temperature readings is also essential for traceability and compliance with safety standards and regulations, particularly in medical and laboratory environments.