Laboratory Thermometer

A laboratory thermometer is a tool used to measure temperature with high precision, typically in scientific experiments. It’s designed for use in labs rather than everyday situations like checking body temperature or the weather.

Key Features of Laboratory Thermometers:

• Measurement Range: Usually ranges from –10°C to 110°C (sometimes wider).
• Liquid Inside: Often contains alcohol or mercury (though mercury is less common now due to safety concerns).
• Graduated Scale: Marked in degrees Celsius (°C), and sometimes Fahrenheit (°F).
• Thin Capillary Tube: Allows for precise temperature readings.
• Non-expanding Bulb: The bulb holds the liquid and is designed not to expand with temperature changes.

1. What is the purpose of a laboratory thermometer in a chemistry lab?

A laboratory thermometer is used to measure the temperature of substances, monitor reactions, and ensure experimental conditions are maintained within desired temperature ranges.

2. Can I use a laboratory thermometer to measure body temperature?

No, laboratory thermometers are not designed for measuring body temperature. They are not calibrated for the human body and can be unsafe for personal use, especially if they contain mercury.

3. How should I read the temperature on a thermometer?

Hold the thermometer at eye level and read the scale where the top of the liquid column aligns. Ensure it is not touching the container walls for accurate readings.

4. What liquid is inside a thermometer, and why?

It typically contains alcohol (dyed red or blue) or mercury. Alcohol is safer and used more commonly today, while mercury provides more accurate readings but is toxic if broken.

5. How do I care for and store a thermometer?

Store it upright in a protective case away from heat and direct sunlight. Handle it with care, especially if it’s mercury-filled, and clean it before and after use.