Details

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• ZEAL WHIRLING HYGROMETER FOR HUMIDITY MEASUREMENT 
• MODEL: P2528/P2524
• -5/+50 (°C) 

 

• A whirling hygrometer tells how humid the air is by comparing how much cooler a wet thermometer gets compared to a dry one after spinning in the air.
• A whirling hygrometer has two thermometers attached to a handle that can spin them around.

• One thermometer is called the dry bulb – it measures the normal air temperature.

• The other is the wet bulb – it has a wet cloth wrapped around its tip.

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  🌀 How it works:

• Soak the wet bulb: You dip the cloth in water so it's wet.

• Spin the hygrometer: You whirl it around for about 30 seconds to a minute. This helps air move quickly over the bulbs.

• Evaporation cools the wet bulb: As the water on the wet bulb evaporates, it cools down (just like how sweat cools your skin).

• Read both thermometers: After spinning, you look at the temperatures of both the dry bulb and the wet bulb.

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  💧 What do the readings mean?

• If the air is very dry, the water on the wet bulb evaporates quickly, and the wet bulb temperature drops a lot.

• If the air is humid, not much water can evaporate, so the wet bulb stays closer to the dry bulb temperature.

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  📊 Final step:

  You subtract the wet bulb temperature from the dry bulb temperature and use a chart or calculator to find the relative humidity.