A hydrometer measures moisture in the air
psychrometry
A+ Radiosonde
The moisture decreases.
The warmer the air, the more moisture it can hold. This is an exponential relationship.
A hygrometer measures the moisture content of the air. There are several different types, all of which measure something else which indicates the moisture content.
Moisture meters, under that name, are made for both wood and concrete. There are several designs of these. For measuring the moisture content of the air, an Hygrometer is one type of device. Another device is a Dew Point Meter, quite accurate.
An air pressure measuring device is called a Barometer.
psychrometry
Mercury Barometer
An instrument for measuring atmospheric pressure, used especially in weather forecasting.
A+ Radiosonde
A+ Radiosonde
A+ Radiosonde
Exactly what measuring device? There are hundreds of "measuring devices" to measure different things.
A barometer measures air pressure; a hygrometermeasures humidity, or the moisture content of the air; and an air sampler (or high volume air sampler) is used to measure the purity or pollution level of the air.
A barometer measures air pressure; a hygrometermeasures humidity, or the moisture content of the air; and an air sampler (or high volume air sampler) is used to measure the purity or pollution level of the air.
There are any measuring devices available, your question should be little specific. Measuring device is for electricity or water or earth quake or data traffic or air pressure.