Which of the three types is more accurate: glass tube thermohygrometer, electronic screen thermohygr

1. Gas thermometer: hydrogen or helium is mostly used as a temperature measuring substance, because the liquefaction temperature of hydrogen and helium is very low, close to absolute zero, so it has a wide range of temperature measurement. This type of thermometer is highly accurate and is mostly used for precision measurements.

2 Resistance thermometer: It is divided into metal resistance thermometer and semiconductor resistance thermometer, both of which are made according to the characteristic of the change of resistance value with temperature. Metal thermometers are mainly used in pure metals such as platinum, gold, copper, nickel, rhodium, iron and phosphor bronze alloys; Semiconductor thermometers mainly use carbon, germanium, etc.

Resistance thermometers are easy to use and reliable, and have been widely used. It measures in a range of -260 to around 600.

3. Thermometer: It is a widely used temperature measuring instrument in industry. It is made by using the phenomenon of temperature difference electricity.

Two different wires are welded together to form the working end, and the other two ends are connected to the measuring instrument to form an electrical circuit. When the working end is placed at the measured temperature, when the temperature of the working end and the free end is different, an electromotive force will appear, so that there is a current passing through the loop. By measuring electrical quantities, the temperature of another place can be determined by using the temperature of a known place.

It is suitable for between two substances with a large temperature difference, and is mostly used for high temperature and low turbidity measurements. Some thermocouples can measure high temperatures up to 3000 degrees, while others can measure low temperatures close to absolute zero.

High-precision thermometer.

4. Pointer thermometer: It is a thermometer shaped like a dashboard, also known as a cold and heat meter, which is used to measure room temperature and is made of the principle of thermal expansion and cold contraction of metal. It uses a bimetal disc as a temperature sensing element to control the pointer.

Bimetal sheets are usually riveted together with copper and iron sheets, with the copper sheet on the left and the iron sheet on the right. Because the thermal expansion and contraction effect of copper is much more obvious than that of iron, when the temperature rises, the copper sheet pulls the iron sheet and bends to the right, and the pointer is deflected to the right under the drive of the bimetal sheet (pointing to high temperature); Conversely, when the temperature is lower, the pointer is deflected to the left (pointing to a low temperature) driven by the bimetal.

The humidity agent of the glass tube, the humidity agent of the electronic screen, is just the real warmer's agent, these three words, they are used in different places and different environments, they have their own strengths, so as for who is more accurate, it depends on their use environment and one of their use videos.

Glass tube temperature display, electronic screen display pointer is a display, these three kinds of glass tube display is closer, more accurate.

The answer to this question is not absolute, relatively speaking, the electronic screen display thermometer is the highest, the pointer thermohygrometer is the second, and the glass thermometer is the least accurate. But the second-class standard mercury thermometer is a glass thermometer, which can be accurate as a standard.

The size of the glass tube is to tell you, I think this is still a should or choose some glass tubes, this can be accurate and accurate, just say that the little baby Feilong must not learn enough.

Household is different from the temperature and humidity meter for scientific research,The general error is not too large,I personally recommend the Mijia electronic temperature and humidity meter launched by XiaomiPro,Used for a year,High accuracy,And can be interconnected with smart home products through the Bluetooth gateway,For the baby room,You can combine various temperature and humidity adjustment appliances to ensure the comfort of the baby,And can meet the parents' remote monitoring of temperature and humidity、Real-time reminders, etc.,The practicality is very high。

Glass tube thermometer, electronic screen, thermometer, and pointer thermometer should be glass tube thermometer, mercury thermometer is the most accurate and accurate.

Glass tube thermohygrometer, electronic flat thermohygrometer pointer thermohygrometer, this more accurate must be the electronic screen!

Definitely pointer accurate. Because the old man left behind.

Looking at the situation, I think it is still an electronic screen thermometer, this one will be more professional.

In this case, the pointer thermohygrometer should be more accurate.

Indicator light, I think this is also the glass tube will be bigger, it should be more accurate, what else can the school do?

1.Generally, electronic forms are more accurate;

2.The pointer measures the temperature by the thermal expansion and contraction of the substance, and the humidity measurement depends on the moisture absorption or dehumidification of the substance to change the volume or length; For the electronic type, the temperature is determined by the thermistor.

Humidity is measured by a moisture-sensitive capacitor or a moisture resistor.

3.If you want to put a thermometer.

Put the refrigerator freezer directly to measure, that temperature sensor.

It is necessary to choose a low temperature that can measure -20 degrees, and the general glass thermometer cannot measure such a low temperature. Electronic.