1. Kata Thermometer
  2. Anemometer
  3. Sling Psychrometer
  4. Clinical Thermometer
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Option 3 : Sling Psychrometer

Sling Psychrometer is the instrument used to measure the relative humidity in the atmosphere.

Sling Psychrometer is the simplest type of Hygrometer

While Kata thermometer measures the air cooling power, Anemometer measures the speed of the wind, the Clinical thermometer is used to measure body temperature.

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