I think it is a barometer and aneroid barometer
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.
Air pressure
Calipers, of which there are many types, are used to measure thickness. The most common type is the Vernier Caliper.
It is used to measure blood pressure - it's the inflatable blood pressure cuff you see at the doctors.
Boyles law refers to an experimental law involving gas and its pressure, used to measure the volume of that gas. It ultimately measures the pressure and volume of that gas.
Instruments such as thermometers, barometers, anemometers, and hygrometers are commonly used to measure temperature, air pressure, wind speed, and humidity, respectively. These instruments provide valuable data for meteorologists to analyze and forecast weather conditions.
The barometer is used to measure air pressure while the rain gauge is used to measure the amount of rainfall.
A millibar is a unit of pressure most commonly used to measure atmospheric pressure.
Barometer is used normally.Now adays electronic instruments are used.
The suffix "-meter" is used to indicate a tool or instrument used for measuring pressure. An example is a manometer, which is used to measure pressure in a system.
There are many instruments that meteorologists use to measure weather. The two most commonly used instruments are a barometer and a thermometer.
The basic weather parameters and instruments used consist of a barometer to measure air pressure and a wind vane to measure the speed of the wind. Other instruments used include a thermometer and rain gauge.
MANOMETER BAROMETER
There are many different instruments which are used to measure different aspects of the weather: wind speed, wind direction, pressure, temperature, humidity, precipitation, cloud cover, etc.
Ruler, Yard Stick, Tape measure, Calipers.
Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges.
Instruments such as calipers, rulers, and tape measures can be used to measure the width of a book. These instruments provide an accurate measurement of the book's width in either inches or centimeters.