What is a Barometer

What is Barometer – A ‘Weather Forecast’ Sensor

Do you have a smartwatch, a smartphone or fitness tracker?? If YES then do you know what is barometer?

Yes, you are right – its a sensor but why is useful and how it benefits us? If you want to know the answers to these questions then maintain

Table Of Contents

  • What is Barometer?
  • Types Of Barometer
  • Wearable’s Which Have Barometer Included
  • How Does A Barometer Work?

What is Barometer?

The barometer is an instrument utilized for measuring air pressure[pressure inside the atmosphere of Earth]. Fundamentally, it is used to forecast short-term shifts in the weather.

Definition Of Barometer

The term “Barometer” is obtained from the Ancient Greek – ‘βάρος’ [Baro] which means weight and ‘-meter‘ from Ancient Greek μέτρον which means measure.

Types Of Barometer

A]. Aneroid Barometers

Aneroid Barometers [AB] was invented by a French scientist Lucien Vidi in 1844. This is an instrument which is utilized for measuring pressure which doesn’t involve any sort of liquid.

This type is generally used in recreational boats and also in homes.

B]. MEMS Barometers

These barometers are extremely small devices which are between 1 & 100 micrometers [in size] which are called as Micro Electro Mechanical Systems or in other terms “MEMS”.

Are created via photochemical machining [PCM, also known as photochemical milling, a process which is employed to construct sheet metal components] or photolithography. Application incorporate altimeters, electronic barometers etc.

Barometers can be found in smartphones, smartwatches, fitness trackers etc. Smartphones like Samsung Nexus S3, Motorola Xoom, iPhone 6 etc & in smartwatches like Timex WS4.

C]. Mercury Barometers

D]. Water-Based Barometers

Wearable’s Which Have Barometer Included

  • Suunto Ambit3
  • Suunto Traverse
  • Garmin Fenix 3 HR
  • Samsung Gear S3
  • Samsung Gear S2
  • Mi Band 2
  • New Balance RunIQ
  • & More

How Does A Barometer Work??

This is generally used as an instrument which measures atmospheric pressure.

Mercury Barometer Working

Italian Physicist and Mathematician, ‘Evangelista Torricelli’ invented this sort of the barometer in 1643. It consists of a glass tube which is 3 feet high. The glass tube has 2 sides – one side is sealed and the other is open.

A tube is loaded with mercury and also has a reservoir with both edges secured.

The glass tube has a mercury level which falls, that leads to delivering a vacuum at the head. It balances the weight of mercury in the glass tube which is against the atmospheric pressure.

There Are 2 Kinds Of Pressure Levels –  

  • Low Pressure [LP]
  • High Pressure [HP]

Low Pressure

  • Low Pressure plays when the weight of the mercury is higher than the atmospheric pressure and the mercury level in the tube drops.

High Pressure

  • Low Pressure plays when the weight of the mercury is shorter than the atmospheric pressure and the mercury level in the tube rises.
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