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What is Thermometer ?

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Last updated date: 04th Mar 2024
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Introduction to Thermometer

We can measure temperature using an instrument called a thermometer. A sealed tube with markings on it makes up an analogue thermometer. Temperatures are indicated with these markers in either Celsius or Fahrenheit. A clinical thermometer has different markings than a weather thermometer, although they both function the same. 


In addition, the current thermometer was innovated in 1709 by Daniel Fahrenheit. It was a tube surrounded by glass that had a numerical scale, called the Fahrenheit scale. The first clinical thermometer was made by Sir Thomas Allbutt, an English medical practitioner. In this article we will discuss the thermometer in detail.


What is a Thermometer? 

The term thermometer comes from the Latin word ‘Thermo’ which means hotness and ‘Metrum’ which means estimate. Thus, a thermometer is a knowledge-based tool for estimating temperature. The temperature of a device or material makes reference to how cold or hot it is. The human body comes in contact with the thermometer on a daily basis.  


You can use this thermometer when you want to know how cold or hot it is outside.  A physician takes your body temperature when you have a doctor’s meeting. A thermometer accommodates two important components: a sensor and a device. A thermometer works by using the physical properties of various materials.  For example:- liquid, solid, and gas.


Measuring the temperature of different phases


Measuring the Temperature of Different Phases


Types of Thermometer

There are different types of thermometers used to calculate the temperature. Some of them are:- 

  • Objective thermometer 

  • Nursing thermometer 

  • Analog thermometer 

  • Infrared clinical thermometer 

  • Mercury-in-glass clinical thermometer 

  • Spirit thermometer 

  • Fixed pressure gas thermometer 

  • Certain volume thermometer 

  • Radiation pyrometer thermometer 

  • Dry bulb thermometer 


Thermometer for Liquids

What’s Inside a Thermometer?

Liquid thermometers frequently include both Celsius temperature and Fahrenheit temperature scales, which are shown on either side of the tube. The highest thermometer is a closed type of liquid thermometer. In the highest thermometer, the liquid is moved up the glass tube, but cannot come down easily when the temperature moves down. 


Several thermometers are made for utilising liquids. The mercury thermometer was the first, originated by Daniel Fahrenheit. A mercury-in-glass thermometer contains liquid mercury in a glass bulb devoted to a thin, surrounded tube. As the temperature increases, the mercury becomes larger. Afterward, mercury is extremely poisonous. It is simple and not expensive.

 

A mercury thermometer


A Mercury Thermometer


Uses of Thermometer

  • It is used to notice if you are suffering from fever. 

  • It is used to see how cold or hot it is outside. 

  • It is used in schools, hospitals, houses, automobiles, industries, etc.

  • It is used to measure the temperature of babies also. 

  • It is used to track and record the opposites of temperature at a place.

  • It is used to estimate the maximum and minimum air temperature like in a greenhouse.

  • It is used for measuring the temperature during physical exams. 

  • It is used for measuring the temperature of a pool. 


Thermometers Facts

  • The thermometer is a straightforward device that is used to calculate the temperature. 

  • People are allowed to tell how cold and hot it is by knowing the temperature measurements.

  • A remarkable temperature substitute usually shows something is wrong.

  • Thermometers have been in all directions for a number of centuries. 

  • A thermometer includes many elements like a tube, bulb, and stem.

  • The tube doesn’t survive an automated thermometer. 

  • The very first thermometer that originated contained water in them alternately mercury. 

  • The difference between a thermometer and a thermoscope is that a thermometer has a valuation while a thermoscope does not have any valuation.

  • The Galileo thermometer was innovated in 1593.

  • The Celsius scale has 100 temperatures and Fahrenheit has 180 temperatures. 


Summary

In this article, it was discussed how the thermometer is used nowadays and also studied the definition of the thermometer, uses of the thermometer, types of thermometers, and facts about thermometers.We can measure temperature using an instrument called a thermometer. A sealed tube with markings on it makes up an analogue thermometer. Temperatures are indicated with these markers in either Celsius or Fahrenheit. A clinical thermometer has different markings than a weather thermometer, although they both function the same.

FAQs on What is Thermometer ?

1. How can one measure body temperature by keeping a thermometer in mouth?

Inhale through your nose. Hold the thermometer firmly in place using your lips. Place the thermometer in your mouth and hold it there for three minutes, or until it beeps. After beeping, note down the temperature. 

2. Why is mercury a good choice for a thermometer? 

Mercury is a good choice for a thermometer because mercury is in a liquid state at room temperature and has the largest amount of growth. As a result, even the modest change in temperature is remarkable. Besides, the steaming point of the mercury makes it acceptable for measuring excessive temperature. The second reason why mercury is best for mercury in a glass thermometer is that it does not Pole the plane of the glass and has a glossy look. That’s why mercury is good.

3. How do you know if a thermometer is exact? 

To examine if a thermometer is accurate, we need to push the stem of the thermometer into the ice water like the stem is at least a bit deep without touching the glass. Wait for a while or even if the thermometer schedules the reading of ice water. On the condition the thermometer reading is 32 degrees Fahrenheit or 0 degrees Celsius,  then the thermometer is exact. The thermometer will never show you incorrect results. We can also put an example of pure cold water into the glass.