Heat and Cold

Measuring Temperature

What types of psychrometers are there?

Old-style sling psychrometers are made from two thermometers secured to metal that is allowed to hang for a number of minutes until the wet bulb begins to cool. More modern psychrometers use a variety of sensors, including the use of chemicals that change their electrical conductivity due to humidity levels.

Utility companies use a measurement called “cooling degree days,” which estimates how many days people are likely to run their air conditioners yearly.

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