Clinical Thermometer Diagram - How It Works & Uses #2253433 (License: Personal Use)

This vector-style image depicts a standard mercury-in-glass clinical thermometer, angled diagonally with a bulbous base containing red liquid (representing mercury or colored alcohol) and a calibrated scale marked by black lines. The red column rises through the narrow capillary tube toward the rounded tip, visually demonstrating temperature measurement. Designed for oral, axillary, or rectal use, such thermometers were once standard in healthcare before digital alternatives became widespread.

Used on health education pages, medical blogs, or product comparison sites to explain basic thermometry principles; targets users seeking to understand how traditional thermometers function or compare them with modern digital devices.