Digital thermometer: Which is the best of 2020?

Digital thermometer: Which is the best of 2020? 1

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When winter arrives, the constipation, the flu and with it the fever and other symptoms, which can be more or less severe.

It is then time to use the thermometer to know to what extent our body temperature is normal and to check how the disease evolves.

It is therefore essential that its measurements are as accurate as possible.

Accuracy is even more essential if there are babies or young children in the home. In such cases, digital thermometers can help us decide whether a visit to the doctor is necessary.

Their great features and additional functions make them ideal replacements for a lifetime of mercury thermometers.

  • The most common application of digital thermometers is to measure the temperature of people. However, some models are also designed to measure the temperature of the environment and various objects.
  • There are mainly two types of digital thermometers: resistive thermometers and digital infrared thermometers.
  • The purchase criteria that can help you choose the right digital thermometer are the use you will make of it, its accuracy, the method of measurement and the measurement time.

The best digital thermometers on the market: our recommendations

Below you can see our selection with five of the best digital thermometers available on the market today.

It is the result of a thorough research in which we have analyzed a wide variety of products, always taking into account the opinions of previous buyers.

  • The favourite digital thermometer for online shoppers
  • The digital infrared thermometer
  • The digital thermometer for children
  • The most durable digital thermometer
  • The most versatile digital thermometer

The favorite digital thermometer for online shoppers

This thermometer from Ctiuya is one of the best-selling models on the market.

It is a very versatile device, as it can read the temperature in the armpit, mouth and rectally.

It is a thermometer suitable for children and adults.

To use it you just have to put it in the chosen place and activate the sensor, in only 60 seconds it indicates the temperature.

The tip is waterproof and easy to clean. It has an automatic shut-off system.

Where to buy

The digital infrared thermometer

iHealth offers a digital thermometer that works with an infrared system.

It does not need to touch the skin to determine the temperature, just place it a few inches from the patient’s forehead. It can be used for adults and children.

This thermometer has 3 ultra-sensitive sensors that provide an accurate reading.

It has an LED display with large digits and only one button to operate. It requires 2 AAA batteries to operate.

Where to buy

The digital thermometer for children

iHealth offers a digital thermometer that works with an infrared system.

You don’t need to touch the skin to determine the temperature, just place it a few inches from the patient’s forehead. It can be used on adults and children.

This thermometer has 3 ultra-sensitive sensors that provide an accurate reading.

It has an LED display with large digits and only one button to operate. It requires 2 AAA batteries to operate.

Where to buy

The most durable digital thermometer

Thermobio offers one of the most durable digital thermometers on the market.

This equipment has a life span of at least 1000 hours of use, making it ideal for those who use it frequently.

This thermometer works with infrared technology, so it can read the temperature from a distance.

It can provide the temperature in just 1 second and with great accuracy.

It provides the option of viewing the temperature in either Fahrenheit or Celsius units.

Where to buy

The most versatile digital thermometer

This model of Sanpu stands out for being able to read the temperature in various places of the body.

It can be placed in the ear, mouth, armpit or rectum.

The tip can be cleaned using alcohol.

This thermometer gives a reading in a time range of 30 seconds to 1 minute.

It has an alarm that warns when to remove it. It requires an LR41 battery for use.

Where to buy

Shopping Guide: What you need to know about digital thermometers

Digital thermometers can help us know if a cold or flu is getting too bad.

They are very helpful in monitoring babies’ health.

That’s why it’s so important that, before buying one, you clear up any doubts you may have about how it works, how it’s used and the different types that exist.

What exactly are digital thermometers?

Digital thermometers are small electronic devices that measure the body temperature of people, animals, objects and the environment. They can take measurements by direct contact or, in the case of infrared thermometers, at a distance.
And they can do it in different parts of the body.

They show the information of the readings taken on a small digital display.

They are much safer than traditional lifetime mercury thermometers and generally make very accurate measurements.

Most also have a number of additional functions, such as storing the latest readings or warning if they detect a fever.

Whether you are looking for a baby thermometer or for your emergency kit, the digital option has many advantages.

What types of digital thermometers are there?

Basically, it is possible to distinguish between digital thermal resistive thermometers and digital infrared thermometers.

In the following table, we compare their main characteristics.

What are the advantages of digital thermometers over mercury thermometers?

As you can see below, with digital thermometers there are all advantages.

It is therefore not surprising that they have become so widely used in recent years, becoming the natural substitutes for mercury thermometers.

  • They can measure temperature even at a distance.
  • They allow temperature to be measured in less time.
  • They are very easy to use, as they show the temperature on a digital display.
  • They are very economical.
  • They allow you to measure the temperature through different parts of the body.
  • They are more ecological and safer.
  • They have memory, so they can store the values of the last measurements.
  • In general, they are more accurate.

For whom is it advisable to buy a digital thermometer?

Today, in any home, it is essential to have a digital thermometer.

Especially if there are small children or elderly people in the house, and even more so if you are responsible for someone who is sick or in poor health.

Of course, they are also indispensable in nurseries and kindergartens.

Where should digital thermometers be placed to measure temperature?

Today’s digital thermometers can take body temperature measurements at different locations.

They are most commonly placed in the armpits or in the mouth.

Those that take measurements through the ear or even through the forehead are also widely used.

However, those designed for the rectal area are not so common.

Of course, there are also those that combine several of these options, with the versatility that this implies.

For babies and children up to the age of three, rectal measurements are the most accurate.

From the age of three, oral measurements are recommended.

In general, experts feel that measurements in the armpits are less accurate.

How do you use a digital thermometer?

As we have seen, there are different types of digital thermometers, so in each case it is necessary to take into account a series of recommendations.

Before using an oral thermometer, it is essential that you make sure that both your hands and the thermometer are clean.

Also, they should not be used if it has not been 15 minutes since the last meal or drink.

After use, it is recommended that you clean it with alcohol and rinse it with water.

Earphones are not suitable for babies under six months of age and of course they need to be cleaned properly.

In addition, you should be careful and use the thermometer according to the manufacturer’s instructions.

Otherwise, they can lead to erroneous readings.


Purchase criteria

Having a digital thermometer at home is essential, particularly if you live with children or elderly people.

Depending on the circumstances or the use you are going to give it, you will have to choose one model or another.

To help you find the right one, we have prepared the following purchasing criteria.

  • Use you will make of the thermometer
  • Measurement method
  • Measurement time
  • Accuracy
  • Functions
  • Battery and accessories

What are you going to do with the thermometer

The first thing you need to think about is what you’re going to do with the thermometer.

You don’t need the same one to measure a baby’s temperature as you do to use it with adults.

In the first case, you should use one with a minimum measurement time, as the baby may be inclined to move around and it may not make the task much easier.

Or even one with infrared technology.

If the digital thermometer is to be used by older people, you want one that is easy to use.

Also, if they are visually impaired, one with a large display or one that provides sound measurement results is most convenient.

If you want it for children or teenagers, nothing better than one with a sturdy design.

Measurement method

Digital thermometers can measure temperature in a variety of ways.

Most commonly, they do so in a manner similar to that of lifetime mercury thermometers through the armpit, mouth, and rectal area.

However, there are also those with infrared technology that are able to make accurate measurements in a short time without the need for any contact.

However, there are also those who can carry out measurements in the ears and other parts of the body.

These types of thermometers are certainly ideal for babies and small children.

The results are obtained quickly, so they can be used even if they are sleeping.

Measurement time

Digital infrared thermometers measure the temperature in one second or in a few seconds at most.

Thermal resistive thermometers, on the other hand, require a longer type of measurement.

In some cases, it takes as little as thirty seconds, although there are also those that need a minute or more.


In general, today’s digital thermometers offer very good levels of accuracy, equal or superior to those of mercury.

However, it is important to note that depending on the part of the body you are measuring, the reading may vary slightly.

The body temperature varies by a few tenths of a second depending on the area where it is measured.

The infrared is usually quite reliable, but only if it is used in the right way. Otherwise, they can give false readings.

Rentals have a reputation for being very accurate, although they are not the most comfortable.

If you need a thermometer that ensures good levels of reliability, opt for one that is accurate to +/- 0.1 °C.


One of the most interesting functions of digital thermometers is the measurement memory.

It is especially useful in case of colds or flu, since it allows to analyze the evolution of the temperature of the affected person.

Some models are capable of storing up to ninety-nine measurements.

Another very practical function is the automatic switch-off.

Most digital thermometers have this feature, but you should make sure that the model you choose has it.

Some models have an alarm function that warns you when the temperature exceeds a certain value.

Battery and accessories

Our advice is to opt for a digital thermometer whose battery offers at least one year’s autonomy.

Also, in the most common case of using batteries, you should make sure you can easily find spare parts.

Likewise, check that the replacement mechanism is not complicated.

Moreover, many manufacturers offer their digital thermometers with a series of accessories and complements.

Some include a handy storage bag or box for storage.

Ear thermometers often come with a set of replacement reader covers.


Digital thermometers are much safer and more environmentally friendly than traditional mercury thermometers.

The two main types are infrared technology and resistive thermometers.

The former allow measurements to be made quickly and accurately without the need for direct contact with the body.

In addition, most digital thermometers include features such as a fever alarm or automatic shut-off.

Many also have a silent mode.

To choose the right one for you, the first thing you need to think about is what you are going to use it for.

The mode and the time it takes to take measurements are also important.

Finally, if you think that this guide has been helpful to you in your choice process, you can share it through the different social networks or leave us a comment about your shopping experience.

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Jonathan Terreo
Writing for me is not only a necessity, but a passion. As a child I remember always reading and writing, always with a curiosity that seemed to have no limit. I also remember when my first computer fell into my hands. I still retain the same fascination for technology, the same curiosity.
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