Stop using this traditional thermometer

The sudden rise of autumn and the big difference in temperature during the day.


Stop using this traditional thermometer for children!

Try these kinds of development electronic through the thermometer, accurate and safe

The sudden rise of autumn and the big difference in temperature during the day. With the sudden shift from the heat of summer to the cooler early fall, we can easily be knocked out by the cold. When we get sick, the first thing we usually do is take our body temperature with a thermometer.

In fact, taking a person's body temperature is also the initial part of a complete clinical examination.

With the development of social science management technology, the form of thermometers has also undergone a significant change from decades ago. There are more and more options for thermometers, from their measuring principle to the time frame of use, and they are showing a trend of increasing segmentation and individualization, allowing people to live with the simple analysis of data information to grasp the students' own mental health education by conducting temperature tests.

And the story begins in the 16th century.

The history of thermometers

When it comes to the invention of the thermometer, it is inseparable from the advent of the thermometer. The thermometer is a product of the modern scientific revolution in the West.

Galileo first invented a gas thermometer, which uses air to expand and contract.

It consists of a glass cylinder, a transparent liquid and a weight of different densities.

As the temperature changes, the density of the liquid changes, causing the suspended weight to move up and down until it equals the density of the surrounding liquid.

Galileo's invention of the thermometer

In 1654, Galileo's student Foday Nan replaced the water column with alcohol and sealed the other end.

Three years later, the Italian Akde Mia chose mercury instead of alcohol. The mercury thermometer we are more familiar with was invented by Warren Hayter in 1714.

Mercury thermometers carry out the end of the mercury ball with the measurement position has a different structure shape and size, the mercury is heated to produce expansion, the rise in degrees depending on the degree of heat affected by the situation.

The upper end of the mercury column connected to the mercury ball by a slight narrowing to prevent the backflow of mercury into the ball, which is also a thermometer after the use of the mercury column will not achieve automatic control of the decline of the reason, need to quickly as well as shake the mercury to fall into the ball.

Later the common mercury thermometer

However, since mercury solidifies at minus 39 degrees, it is not possible to measure lower temperatures. For example, in Inner Mongolia, the lowest temperature in winter could be as low as -50 degrees Celsius, which could only require an alcohol thermometer instead.

Mercury thermometer is inexpensive, measurement accuracy is high, more importantly, it is not afraid to break, not afraid to lose, while easy to clean and disinfection.

These advantages make the mercury thermometer in the past decades has been popular, become the family and hospital of choice, but also become our 70, 80, 90 children's collective memory of a common color.

Enamel jar of sour plum soup

Now, if you look closely, you will find that mercury thermometers are disappearing, fewer and fewer pharmacies are getting them, and in general and specialty hospitals, mercury thermometers have been gradually replaced by electronic thermometers.

There are many reasons for this. Mercury thermometers take a long time to measure the temperature, and they are easy to break, and most importantly, there is a risk of heavy metal mercury poisoning.

Therefore, China began to phase out mercury thermometers in 2016, and the World Health Organization also issued an initiative to abandon mercury thermometers worldwide in 2020.

Electronic thermometers gradually developed to occupy a higher share of the market economy. And infrared ear temperature gun, forehead temperature gun and many other product types of new temperature measuring devices are also being increasingly used in daily learning life. So students face a so many choices, our country should be just how to pick out the most suitable for China's own thermometer?

This article today will analyze and study the differences of these thermometers from the following perspectives, as well as the trend of continuous improvement of patented information technology in this field.

Can you choose a thermometer from accuracy?

First of all, we need to be clear that there is no problem with any type of thermometer that measures data. However, there will be differences between the measured data because of the different operational requirements of different thermometers and the different body temperatures at the measurement site.

In principle, liquid thermometers like mercury thermometers use the laws of thermal expansion and cold contraction of liquids. Electronic thermometers use physical parameters such as resistance, voltage and current to determine the relationship between ambient temperature and human body temperature in digital form. It is easy to read, mercury-free and harmless to humans, but its accuracy is closely related to the electronic components used.

Electronic thermometers

Ear guns and forehead warmers rely mainly on sensors to receive infrared light from the human body to determine body temperature.

The working principle of ear gun is to use thermopile sensor, mainly infrared sensor, to detect the far infrared radiation intensity of human eardrum 6-15 μ m. The radiation intensity is related to the temperature of the thermopile itself, so it is necessary to calculate the relationship between the radiation intensity and the temperature of the thermopile itself to get the temperature of the object to be measured.

The forehead temperature gun and ear temperature gun have the same principle, but the emissivity and mouth temperature compensation values are different due to the different measurement sites.

In the ideal state, the ear temperature gun and the forehead temperature gun measurement research results should be accurate, but in China the actual need to use the management process, many different consumers can reflect the enterprise themselves did not get the measurement data results can not be accurate, or not repeatable.

This makes many people doubt the accuracy of the measurement of the ear and forehead temperature gun.

In fact, the accuracy of these two measurement methods itself is not a problem, but due to the influence of room temperature, dry skin, etc., there are certain technical requirements for the operator, and the accuracy of the measurement results will be reduced with the increase in the number of measurements.

For example, the ear temperature gun itself will affect the temperature of the ear canal, and if the measurement is repeated within a short period of time, it will affect the accuracy of the measurement results.

Ear thermometer and forehead thermometer

Depending on the type of thermometer, the maximum allowable error values in the national recommended standards differ.

Allowable error value of thermometer

Can a thermometer be selected from the way it is used?

The optimal measurement site is different for different thermometers.

It can be said that the ear thermometer and forehead thermometer, which have emerged in recent years, are only because the traditional measurement sites such as the oral tongue, armpit, anus, rectum, etc., have been changed to more convenient sites such as the ear, forehead, etc.

, which has caused a buying boom.

Many budding parents unexpectedly students find it far more difficult to measure their baby's temperature than they could have imagined.

Since our infant brain development for the ambient temperature is not really able to do a good control, it is easy to produce hyperthermia. If we ignore the symptoms of fever in the infant's body, it may affect lead to febrile convulsions.

This is why it is important for companies to be able to more accurately measure a child's body temperature in childcare.

However, children are like balloons and can resist all needles and even sticks. At the same time, when an electronic thermometer is placed under the tongue for measurement, children sometimes involuntarily bite into the probe part and damage the electronics, resulting in inaccurate readings.

In this case, a gun with warm ears and forehead is a better choice.

Try not to give mercury thermometers to children

An ear thermometer is used to measure the temperature of the ear drum. It comes in two types: contact and non-contact. The contact type ear thermometer measures the temperature in the ear.

Ear muffs should be worn every time it is used. When the earmuffs are broken, they need to be replaced promptly. The forehead thermometer is susceptible to damage from heavy drops or collisions, and while extremely fast in measurement, it is less accurate and more suitable for rapid screening of individuals with abnormal body temperatures in the population or for quickly determining whether a child has a fever.

It is important to note that an ear thermometer or ear wax inserted too shallowly can cause a certain amount of error. When measuring, the ear is straightened outward, aligned with the periosteum, and the external ear canal is blocked so that the temperature measured in a closed manner is accurate. This is why experts recommend avoiding the use of an ear thermometer for temperature measurement in babies under 6 months of age, as babies with short ear canals and delicate skin may be accidentally injured by the head of the thermometer.


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How to measure the thermometer more accurately

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