Digital and Analog Thermometer Guide | Health & Medical Tools #137456 (License: Personal Use)

This illustration depicts a traditional glass clinical thermometer with a red mercury column rising past the normal human body temperature mark. The scale features evenly spaced black calibration lines, and the bulb at the base contains the liquid reservoir. Though largely replaced by digital models today, this design remains iconic in medical education and historical contexts.

Used on health blogs, medical websites, or educational pages explaining fever, temperature measurement, or history of medical devices; matches user intent to learn about thermometers, symptoms of illness, or home health monitoring.