Thermometer Illustration - Free Vector Diagram for Science & Education #287509 (License: Personal Use)

This monochrome line-art thermometer features evenly spaced vertical tick marks along a straight tube, ending in a rounded bulb on the right. The design is intentionally simplified to emphasize structure over realism, making it suitable for diagrams, textbooks, or digital learning tools. No numerical values are shown, allowing customization for Celsius, Fahrenheit, or abstract scales.

Used in educational content (e.g., K-12 science lessons), health infographics, weather dashboards, or UI elements where a symbolic temperature indicator is needed. Matches user intent for clear, royalty-free visual aids without branding or complexity.