A variety of instruments are used to measure environmental parameters. One of them is an air temperature sensor . It is widely used in a wide variety of fields: at mobile and stationary weather stations, industrial enterprises, in installations for monitoring technological parameters, in household appliances, laboratory measurements, etc. Its application allows high precision measurements in a wide variety of environments, often inaccessible to humans. The air temperature sensor can be closed or open. It depends on its operating conditions. They also differ by the very principle of measurements. The performance and accuracy of this device depend on this. It should also be noted and design features, they are as close as possible to the working conditions.
For convenience, you can qualify various types of sensors according to the principle of their work. Depending on this, all the main characteristics of this device change.
- Depending on the ambient temperature, the internal resistance of the materials will also change. This property has long been noticed by developers of the so-called thermoresistive elements. Over time, the quality of these devices improved due to the use of more advanced materials as an active element. This type of air temperature sensor works in a wide measuring range. Such devices behave perfectly in low-current circuits and are in good agreement with electronic circuits, which simplifies the development of equipment for signal processing. The disadvantages include non-linearity of the characteristics and low accuracy during measurements.
- If you use a semiconductor element instead of a thermistor, you canto achieve a significant increase in the accuracy of measurements. This property was laid in the devices of this type. The outdoor temperature sensor, as the active element in which the semiconductor operates, has only one drawback. This is a small measuring range (-55 - + 155).
- Thermoelectric converters have good performance. These are the so-called thermocouples, widely used both in production and in everyday life. An air temperature sensor of this kind can be seen, for example, in a sauna. They are reliable and durable in operation. The disadvantages of such devices include, perhaps, the ability to work only in the positive range of measured temperatures.
In addition to the above, there are also so-called pyrometers and acoustic sensors. The former are used for remote measurements of heated bodies, and the latter are used for measuring gas media of different temperatures.
As you can see, air temperature sensors come in many different designs, and their work is designed taking into account all the technical characteristics of the device. They work well with modern electronic equipment and are used in various fields.