🔍 Thermometer – Mercury & Alcohol Filled – Key Features
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Mercury-Filled Glass Thermometer – High-Range Precision
The Mercury Thermometer uses a silver-liquid mercury column encapsulated in borosilicate glass, suitable for high temperature ranges (e.g., –37°C to +356°C) with excellent linear expansion characteristics.
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Alcohol-Filled Glass Thermometer – Safe Low-Temperature Option
The Alcohol‑Filled Glass Thermometer is filled with coloured ethanol or other spirit, allowing measurements from very low temperatures (down to –114°C for some mixes) and offering safer use in educational or meteorological settings.
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Versatile Use in Classroom, Lab and Industrial Settings
Both thermometer types feature a glass stem, calibrated scale and often a plastic case; they are widely used in laboratories, for industrial temperature measurement and instructional demonstrations of liquid-in-glass thermometry.
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Material & Safety Considerations with Clear Usage Boundaries
While mercury thermometers provide robustness and high thermal range, mercury is toxic and regulated for phase-out in many regions; alcohol thermometers offer safer alternatives though typically with lower upper-temperature limits.