Clinical Thermometer Illustration - Medical Measurement Tool #3725242 (License: Personal Use)

This image depicts a classic analog clinical thermometer with a transparent glass tube, a bulb containing blue liquid (representing mercury or alcohol), and evenly spaced black calibration marks. The design reflects traditional medical instruments used before digital thermometers became widespread. The illustration is clean and schematic, suitable for educational or informational contexts.

This image is commonly used in health education materials, medical websites, and科普 articles to explain how thermometers work or to illustrate historical medical tools; it serves users seeking basic understanding of temperature measurement devices.