Temperature Measurement Thermometer


Measuring temperature is required in every aspect, as it is defined as a process that helps in identifying the current temperature of the respective body. In various fields, from industries of metallurgy to cooking, the temperature is being measured. However, over the years, several devices, as well as sensors, are used to conduct the measurement of the temperatures. This further means, Gauging temperatures and as it is a physical property it can be referred to as the substance of thermometric.

Definition of Thermometer

The sense of touch assists us with the knowledge of whether the respective object is cold or not, but it fails to provide the exact amount or degree of hotness or coldness of the stated object. Therefore, the instrument for measuring such temperatures, the most common device, the thermometer, has been invented. Three common units of measurement are there that help us with the notions reading and that includes, scales for Kelvin, Celcius and lastly, Fahrenheit (Begaliyev et al. 2021).

Celsius is referred to as a part of the metric system associated with measurements that include length in kilometres and mass as kilograms.

Types of Thermometer

Several types of thermometers are noticed, in the field of application, which include, the Liquid-in-glass-thermometer, Resistance thermometer, Gas thermometer and lastly, Thermoelectric Thermometer.


In a Liquid-in-glass-thermometer, the substance used as a thermometer is any kind of alcohol or mercury and these thermometers are used in measuring the temperatures of the changes that are noticed in the volume of liquids.

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Gas Thermometer

In Gas thermometer the thermometric substances' ' that are used are glasses and they have the physical property to measure the changes within the degrees of pressure at a constant volume and at a constant temperature associated with it. The gases used in this thermometer are hydrogen and helium.

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Thermoelectric Thermometer

This Thermoelectric Thermometer is used to measure very high temperatures and works on the principle known as, thermocouples. The diagram below shows the usage of two metals that are joined at the ends that include both hot and cold ends is heated and known as the hot junction and cold junction respectively.

Resistance Thermometer

The Resistance Thermometer is a type of thermometer that is used to measure temperatures and the thermostatic substances that are used is known as, resistance wire, which is dependent on the changes noticed in the electrical resistances with temperatures.

Usage of thermometer

Thermometers have a wide range of usage in daily lives starting from the house to the industry. It is used mostly for measuring the temperature but the application process and approaches may differ from one place to another.

In the Industries

In the industry, the thermometer is used for checking the leaks in the air and poorly insulated areas that can harm safety. Here, thermometers appear as an essential component for keeping the safety of the industrial areas in check. For example, the interior ane exterior surfaces of the walls can be checked with the help of thermometers.

In the House

Thermometers come in handy forms for using them in the house, especially for measuring the temperature of the house. It can be used to measure the temperature of the room as well as the body temperature of people who are suffering from health issues. Thermometers have significant usages in terms of keeping utmost safety in the house, especially for children.

In Restaurants

In restaurants, thermometers are used for checking the temperature of the cooking oil or edible food preparations. A thermometer can make it easier for restaurants to check the whole batch of food all at once.

In Automobiles

Thermometers are used in automobiles to ensure the safety of the riders, especially when they are having hard times reaching the equipment of the cars. It can also be effective as a diagnostic tool if equipped properly in cars (Errulat et al. 2019).

Ways to take the Temperature in Thermometers

Taking temperature on a thermometer can follow multiple ways based on the purpose and requirements. First, it can be useful orally, when the thermometer is placed under the tongue in the mouth. It can be used in an axillary way by placing it in the armpit to measure temperature. It can also be used in a tympanic way when it is placed in the ear (Errulat et al. 2019).


Thermometer consists of substances such as, liquids, solids and gasses are measured with the help of thermometers. Celsius is the most used scale in the world, states 0 degrees C to be the freezing point, whereas, 100 degrees C denotes the boiling point for water. A thermometer can also be used by placing it on the temporal artery where it will be able to scan the surface of the forehead to measure temperature successfully. Thermometer is the most common of the devices which can easily provide a reading that caters to the respective degree of hotness or coldness of any substance.


Q.1. Which preventive actions are recommended while using a thermometer?

Ans. Thermometers that do not contain mercury are always recommended to make them more safety-efficient. In addition, if the mercury within the thermometer is spilled out after it breaks into pieces, cleaning it with a vacuum cleaner is strictly prohibited under safety guidelines.

Q.2. How much time does a thermometer require to measure temperature?

Ans. A thermometer should be kept for 3 minutes in a place that can hold it tightly for measuring temperature properly. After the thermometer starts beeping, it can be removed for checking the temperature counted on it.

Q.3. What are the three major components of a thermometer?

Ans. A thermometer has thee significant parts, the tube, the stem and the bulb. In the case of the digital thermometers, the tube section is missing as it is not needed in digital technology.

Updated on: 09-Jan-2023


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