常用的温度计有哪些？
从大体上看，可以分为两种：
顾名思义，接触式温度传感器就是可以直接接触被测物体的温度传感器。接触式温度传感器的检测部分与被测物接触良好，又称温度计。温度计通过传导或对流达到热平衡，使温度计的示值可以直接代表被测物体的温度。通常，测量精度较高。在一定的温度测量范围内，温度计还可以测量物体内部的温度分布。但对于运动物体、小目标或热容量小的物体，会出现较大的测量误差。常用的温度计有双金属温度计、液体玻璃温度计、压力温度计、电阻温度计、热敏电阻和热电偶。广泛应用于工业、农业、商业等领域。
- 非接触式温度传感器
非接触式温度传感器无需与被测介质接触，而是通过被测介质的热辐射或对流到达温度传感器，达到测温的目的。其敏感元件与被测物体不接触，又称非接触式测温仪。本仪器可用于测量运动物体、小型目标和热容量小或温度变化迅速（瞬态）的物体的表面温度，也可用于测量温度场的温度。
非接触式红外测温仪详细介绍
这里主要介绍非接触式红外测温仪。它用于测量流感患者的体温。这种温度计既方便又简单。为避免感染，测量流感患者时必须使用非接触式红外测温仪。皮肤接触，快速测量，是检查流感患者必备的温度计。现在疫情期间，需要非接触式温度计进行测量。
非接触式红外测温仪的应用：
This kind of thermometer has a wide range of uses and can measure the temperature of the human body, which is accurate and fast, and is more convenient than a mercury thermometer; to measure the temperature of human skin, it is generally used in the replantation of amputated limbs. Infrared thermometer; can also be used to measure the temperature of the watch body, like a cup; it is also very good to measure the temperature of liquids with a non-contact infrared thermometer, such as measuring the temperature of bath water, it is very convenient to use this thermometer to measure.
Precautions for non-contact infrared thermometers:
When measuring the body temperature, measure the forehead of the human body. Be careful not to cover the forehead with hair, so as not to affect the temperature measurement. The distance between the instrument and the forehead should be about 8 cm; if the person to be measured comes from a place with large environmental differences, it needs to wait for about 5 minutes before proceeding. Measurement; the person who measures the temperature must be in a stable environment, not at the blower outlet of fans, air conditioners, etc.
Features of non-contact infrared thermometers
This type of sensor mainly includes infrared temperature sensor. The main feature of this temperature measurement method is that it can measure the temperature of materials in motion and objects with small heat capacity (such as the temperature distribution in integrated circuits). The forehead is an ideal location for taking temperature readings because it is crossed by the temporal artery and receives flowing blood from the aorta and carotid arteries. Furthermore, the forehead is the only part of the head that is in direct contact with the brain and not covered by hair. The brain is the most important, delicate and most fragile organ of the human body. The body has a fever, the temperature rises and falls, and the head feels it first. A non-contact thermometer is a modern and safe body temperature measurement device. Non-contact thermometers do not touch the skin, and non-contact infrared thermometers do not need to be placed anywhere on your child's body. Just hold it close to your forehead and keep it at a certain distance, and the thermometer itself can display the temperature.
Recommendations for non-contact infrared thermometers
Dutch scientist Daniel Wallenheit has studied the properties of thermal expansion and contraction. When the temperature is different, the volume is different. Using this property, the temperature can be measured. In principle, a thermometer can be made of any substance that can change its properties depending on the temperature. Therefore, parents should consider carefully when choosing a thermometer for their children, because some thermometers have unsafe factors. For example, mercury thermometers, although they are more common and cheaper, are made of glass, which is fragile, and the exposure of mercury will pollute the surrounding air and cause harm to the human body. Therefore, parents try not to use mercury thermometers. The most common large-scale temperature measurement thermometer is a non-contact infrared thermometer. Here I recommend a non-contact infrared thermometer CK-T1502 fromShenzhen Fitconn Technology. The accuracy of this thermometer is ±0.2°C, and there are two modes that can be adjusted. , it is convenient and fast to use, and the most important thing is high precision, which is very suitable for purchase.
