Types of thermometers, which one to choose in each case?

November 2, 2021

There are many different types of thermometers : traditional, infrared, and digital, just to name a few. Each model works in a different way, but they have the same objective. So which one to choose? the superficial answer to that question is: ‘depending’, although the real reasons are more interesting and worth knowing in detail.

If you are looking for a thermometer for your home or workspace, but don’t know which one to choose from the tide of options, you have come to the right place. We will explain which are the most popular, how they work and finally their use taking into account each scenario. Stay with us because this information will help you make a good decision.

What are thermometers?

Before you even go to the store to buy a thermometer, you should know what you are buying. The definition is easy to understand, but there is often confusion in the specific notions. In short, it is a household and industrial instrument used to measure temperature.

This measurement tool has evolved over time, significantly changing the mechanics of evaluating temperature and its materials. Becoming more efficient, ergonomic and easy to handle even for those who do not have knowledge about medicine or electronic devices.

What thermometer to buy?

The moment has arrived. You are going to buy a thermometer at the physical or electronic store for your home or business. But what model to choose? Well, there are various brands, styles and models.

We recommend that you review the following list of thermometers in stock , where you can find out in detail a set of devices according to their use, advantages and disadvantages.

It is a complete guide on various types of thermometers, easy to read, focused on the needs of users that you have to access if you have questions and want something specific.

Types of existing thermometers

The instrument has positively changed to adapt to any type of situation. Since the human body is not the only body that needs to be measured, various devices were created according to the nature of use. Here the best known.

Traditional thermometer

This is the thermometer that you have seen since childhood and that works essentially to know the temperature of the human body. It consists of a glass tube with a metal clamp inside that contains a liquid, usually mercury, that rises or falls according to changes in temperature.

The premise is this: when placed on the person’s body, the thermometer begins to measure the temperature. If that person gives off heat, then the liquid rises through the metal part. Whereas when the cold wraps the instrument, it goes down. The glass tube has ratings that allow us to know the grades.

Digital thermometers

Like most tools, instruments, and measurement aids today, digital thermometers are modern devices that replaced old alternatives. The design itself is similar, but with a layer of plastic that surrounds and covers the electrical circuit that it houses inside.

They are one of the most used and the operating mechanics follow the following premise: the device has an electrical circuit that measures the temperature of a body or a property and then transmits information to a microchip that processes the data and converts them into digital numbers that are read through an LED screen.

Infrared thermometers

If we are talking about quick measurements, infrared thermometers are the ideal option. The mode of measurement is through the emission of infrared rays that offer data on the temperature of a body, such as humans or food.

The most interesting thing about these devices is that they do not necessarily have to adhere to the body to know the temperature, achieving the fundamental measurement from a distance. They are sophisticated, the radiation is not dangerous and it has a display where the degrees are indicated.

Resistance thermometers

These devices have a wire made of various materials, usually platinum, that have an electrical resistance inside that measures changes in temperature. In terms of origin, they were created in the 19th century. Unlike some alternatives mentioned above, this one requires time to take measurements . So it is usually used more than anything for the outside.

Thermal thermometers

This is another type of device that uses electrical resistance as a temperature assessment method, although it does not need contact. Which is a great advantage. The mechanics are simple: it produces a voltage when a change in temperature occurs. It is fast, it is often used in laboratories , specifically to measure the energy that comes from a medium or device that supplies electrical current when metals are heated.

Thermometric bimetallic

As its name suggests, this is a thermometer that has two metal sheets. When the temperature rises, one of the metals in the device bends against the other. This process is known as dilation and occurs with the increase in volume or magnitude of a physical body. The results are obtained instantly and are indicated by a needle .

Gas Thermometers

We finish with a thermometer similar to the traditional one, but that changes the matter inside. In this case a gas is used which is usually nitrogen. The premise pursued by the instrument is based on the fact that when the temperature of a device rises, the gas expands inside until a valuation is achieved. It is attached to a vial and the gas pushes the handles to determine the temperature.

Which thermometer to choose in each case?

Well, we know what each thermometer is about, but the question remains the same: which types of thermometers to choose in each case? For that, various notions or filters must be taken into account, such as the following:

  • For the home . If you want to know when a family member has a fever, it is advisable to use a traditional thermometer or digital thermometer.
  • For babies . In the case of young children, where it is almost impossible to keep the digitalis attached to the body, the best option is infrared.
  • For the environment . On the other hand, if what you want is to measure the outside temperature, the resistance or thermal ones are chosen.
  • For companies In the event that you want to measure the temperature of machinery and objects that tend to heat up, bimetallic and gas do the job.
Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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