What Is an Ear Thermometer?

Infrared ear thermometers in the United States have been studying the eardrum temperature as the core temperature standard since the mid-1960s. In recent years, a series of infrared radiation ear thermometers have been developed in the United States as the center. This is a thermometer specifically used to measure the temperature of the eardrum. The infrared radiation energy mainly emitted by the eardrum is transmitted to the thermopile through an infrared waveguide. The thermal detector converts infrared radiation energy into electrical energy and performs electrical signal processing to obtain human temperature information. In 1986, T. Shinozaki and others used earphone thermometers for the first time to make ear thermometers that appeared on the US market. There are many types of ear thermometers on the market today, such as Ruiyi ET-100B, Omron-510, Braun HM-2, Kangding HD-7 and so on. Ear thermometers are usually equipped with disposable probe covers to keep them clean and prevent infection. Because the temperature of the eardrum is stable and can directly reflect the internal temperature of the human body, the indication of the ear thermometer can be used as a medical confirmation when the method is used correctly. However, due to higher requirements for users and the use of disposable probe covers, they are generally only used in hospitals or homes.

ear thermometer

Why is the temperature of the left and right ears measured with an ear thermometer different?

Because each person's left and right ear canals are different, the measured temperature varies from person to person. The difference between ordinary people is 0.5 , and the difference is as high as 1.0 , but a few people have the same left and right ear temperature.

Why does the ear thermometer measure 3 or 4 times continuously and the temperature will be different each time?

The ear thermometer has just been taken out of the basin and has not yet adapted to the ambient temperature. Therefore, continuous measurement will result in different data. The same situation will also occur in rooms with too much room temperature. The temperature is much higher, and the rapid change of the ambient temperature is also one of the reasons for the inaccurate value of the ear thermometer. Therefore, in this case, it is recommended that the user place the ear thermometer in the room first and allow it to adapt to the ambient temperature after about 20 minutes, so that a more accurate value can be obtained.

Does the ear thermometer require regular maintenance?

The ear thermometer is a health product. Of course, DIY maintenance is required from time to time. You can use a soft cloth to wipe or a special cleaner for plastic casings. Do not use benzene solvents. The probe lens is the most sensitive part of the ear thermometer. Please wipe it with a mild detergent. As long as you pay attention to cleaning, you don't need much maintenance.

Is the ear thermometer waterproof?

Pay attention! The ear thermometer is not waterproof, so do not immerse the ear thermometer in water or place it in other liquids to avoid damage! It should also be kept dry and protected from direct sunlight outside the temperature range of 10 ° C to 40 ° C (50 ° F to 104 ° F).

Can the earmuffs be reused after the ear thermometer measures?

If it is a public place such as a hospital or clinic, in consideration of hygiene, we have a section B here. You can change the earmuffs to avoid cross infection. Generally, it is not necessary to change the earmuffs for household use. Before measurement, pay attention to whether the earmuff film is ruptured. By the way, remind you to pay attention to whether there is earwax in the ear canal when measuring ear temperature, to avoid earwax sticking to the earmuffs, making the measurement inaccurate.

How long does the ear thermometer last before changing the battery?

The ear thermometer uses a lithium battery (CR2032), which is generally used about 4,000 times. The battery life will vary depending on the frequency of your use. When the battery icon on the upper left of the LCD screen of the ear thermometer flashes blank, That means the ear thermometer battery is dead. Please replace it with a new one. Batteries are usually sold in stationery stores and supermarkets, and they are not expensive, so don't worry about the battery.

How is my ear thermometer instruction manual in English?

Please do nt worry, this product is mainly for foreign trade, not popular in China, so the market is very wide, so it is packaged in English manuals and English color boxes. If you do nt understand English, you can go to the website and print a copy, or send it to the seller. Request a web manual to be sent to your mailbox as a document.

Can the ear thermometer I purchased only measure ear temperature?

General professional ear thermometers can only measure ear temperature. RadIant Innovation ear thermometers are specifically designed to measure ear temperature. The provided measurement temperature is 34.0 ~ 42.2 (93.2 ° F ~ 108.01 ° F), and the temperature is measured. The accuracy is ± 0.1 ° C.

Does the change in ambient temperature in summer and winter affect the measured temperature?

Radiant Innovation ear thermometer will compare and compensate with the ambient temperature. The measured temperature is the same in the normal ambient temperature range of 10 ~ 40 (50 ° F ~ 104 ° F). However, the temperature of the human body changes slightly with the ambient temperature in summer and winter. For example, the temperature inside the body is usually higher after exercising and after taking a hot bath.

Is there a difference in the measurement of the ear thermometer from the air-conditioned room to the place without air conditioning?

When the ear thermometer is from an air-conditioned room to a place without air conditioning, it has not been adapted to the rapid changes in the ambient temperature. In this case, it is recommended that the user first leave the ear thermometer for about 20 minutes and let it adapt to the ambient temperature. You can get the correct measured temperature.

Can the ear thermometer be measured in the sun?

The ear thermometer is not suitable for exposure to sunlight. Ultraviolet rays in the sun can damage the ear thermometer. It is recommended that consumers measure the ear thermometer as far as possible with the indoor environment.

Is ear temperature measurement more accurate than mouth temperature?

The answer is yes, because ear temperature can more accurately reflect the body temperature than the temperature of other parts of the body, so measuring ear temperature is more accurate than mouth temperature.

Does the ear thermometer emit infrared light?

Ear thermometers receive infrared rays emitted by the human eardrum to convert them into body temperature, so it receives infrared rays without emitting them.

The baby's ear canal is very small, and the probe cannot be put in. How can I measure it correctly?

Don't worry, just pull the baby's ears gently downwards and backwards (upwards for adults), make sure to straighten the ear canal, and let the ear thermometer measure the straight eardrum.

Why is the temperature of my measurement result too low?

You can first check if your ear canal is clean, as ear wax can hinder the accuracy of infrared measurements.

What's the difference between earmuff-free and earmuff-type ear thermometers?

According to the design principles and marketing strategies of the manufacturers, they are roughly divided into two types:

1. No earmuff type: This type can directly use alcohol cotton to clean the probe, which can save the cost of purchasing a probe cover (commonly known as "earmuff") later. It is more suitable for home use or a single user.

2. Use probe cover type (commonly known as "earmuffs"): As long as you clean the probe part when cleaning and disinfecting, you need to increase the cost of purchasing earmuffs later. It can prevent cross-infection and is very suitable for medical units, public places, and families with high hygiene requirements.