To read a glass water thermometer, check the floating bulb in the gap. This bulb shows the temperature. If there’s no bulb in the gap, find the average of the bulbs above and below it for the approximate temperature. In some models, the lowest floating bulb also indicates the current temperature.
Next, observe the scale marked on the thermometer. Most glass water thermometers have a scale marked in degrees Celsius or Fahrenheit. Identify the point where the surface of the liquid meets the scale. The temperature reading is indicated at the exact point where the liquid level stabilizes. If the thermometer has a meniscus, read the bottom of the curve for accuracy.
Once you have recorded the temperature, remove the thermometer carefully from the water. Rinse it with distilled water to avoid contamination for future use. Store the thermometer in a safe place to prevent breakage.
By following these simple instructions, you can achieve accurate measurements with a glass water thermometer. Understanding these steps prepares you for more advanced temperature readings. Next, we will explore common applications of glass thermometers in various settings.
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