The ear thermometer mainly uses the theory of infrared reflection, mainly the reflection of the tympanic membrane to measure body temperature.


The tympanic membrane is located deep in the external auditory canal, which can truly reflect the body temperature, so the general ear temperature is a better choice. When testing ear temperature, pay attention to clear the cerumen of the external auditory canal. When checking at the same time, pay attention to straighten the external ear canal, so that it is easy to measure accurately. The infrared thermometer gun is a measurement of the temperature of the forehead. The infrared thermometer gun is mainly affected by the environment. At the same time, if there is a lot of dirt on the skin, sweating of the skin and other reasons, it can affect the value of the forehead temperature.

The infrared thermometer gun is better than the ear warmer gun. Because the temperature of the forehead is affected by the environment and the wind speed, for example, when the wind is high, the temperature of the skin on the forehead will decrease. If you blow air conditioning, in a low-temperature air conditioning environment, the body temperature may also decrease.

But the ear temperature is relatively constant because the ear canal is a relatively closed space. The temperature is relatively constant, so the thermometer commonly used in hospitals is an ear thermometer, or an armpit thermometer.

Of course, some screening projects may use forehead temperature gun, because the operation is faster, so the routine use of screening projects, such as kindergarten morning inspection, or temperature monitoring in large places, are forehead temperature gun.

The temperature of the infrared thermometer gun is 0.5-1 degrees lower than that of the axillary temperature gun. If the infrared thermometer gun measures about 37 degrees, it is necessary to use the axillary thermometer or ear thermometer for further measurement to see if there is any increase in body temperature. Therefore, in general, ear temperature is better than infrared thermometer gum. Of course, if you do a routine screening of body temperature, forehead temperature may have a certain degree of convenience.

Different temperature measurement methods have different standard temperatures.

Specific content: Temperature:

36.6℃~38℃; Oral temperature: 35.5℃~37.5℃; Armpit temperature: 34.7℃~37.3℃; Cochlear temperature: 35.8℃~38℃; Forehead temperature: 35.8℃~37.8℃

1. Working principle:
Any object will emit infrared rays when it is higher than absolute zero (-273°C), and the forehead gun receives infrared rays through the sensor to obtain the temperature sensing data.

2. How to use infrared thermometer gun:
Above the bridge of the nose, the middle part of the eyes is a radioactive source of normal body temperature relative to the body surface temperature. Put the forehead thermometer 5-6cm away from this to measure the temperature. The accuracy is +-0.3. It is not recommended for medical use, but it can be used for rapid and non-contact safety investigation of influenza.

Is it accurate to measure underarms with a infrared thermometer gun:

The temperature of the armpit is higher than the temperature of the forehead. If the temperature of the armpit is higher than 37.3 degrees Celsius, it will be considered as a fever. Very good people use a forehead gun to examine the underarms. Not to mention the high temperature here, there may be a discordant smell.

In fact, the forehead thermometer can not only be used to probe the forehead, it can also be used for oral, anal, axillary, ear, and forehead probes. The body temperature of a person changes, with the person’s age, time of day, and physical activity.

Read the instructions carefully before using the forehead thermometer. The reference value of the body temperature can be used as a preliminary assessment of fever. The reference values ​​of heat detection for each part are: 37.5℃ for oral detection, 38℃ for ear detection, 38℃ for anal detection, 36℃ for frontal detection, and 37.3℃ for axillary detection. When the body temperature is higher than the above reference value, you should suspect fever and consult a doctor.

If you are sure that you have a fever, drink plenty of water, drink water every half an hour to keep your throat moist and urine clear.

It is not suitable for exercise during a high fever, which will increase the body’s pressure, make the muscles consume more energy, and it is not good for cooling down. There is no scientific basis for reducing the temperature by sweating for a lifetime. On the contrary, people’s body temperature will rise. This method is not advisable.

The measurement difference between the forehead gun and the mercury thermometer is a few degrees:

The difference is 1 degree Celsius.

Your mercury thermometer measures the underarms, and the infrared thermometer gum is usually the forehead to be tested. The heat dissipation temperature of the forehead of a normal person is faster than the heat dissipation temperature of the armpit, so the infrared thermometer gum is about 1 degree Celsius lower than the underarm temperature. There is this difference because the forehead belongs to the skin and is easily affected by the external environment, and the armpit is not easily affected by the external environment.

The infrared thermometer gum has the advantages that the mercury thermometer does not have. The test speed of the forehead thermometer is very fast and does not require skin contact, which can reduce cross-infection. The mercury thermometer is more troublesome to test. It needs to be clamped under the armpit for 5 to 10 minutes to see the result. It is not suitable for public use.