A variety of instruments are used to measure environmental parameters. One of them is the air temperature sensor. It is widely used in a wide variety of fields: mobile and stationary weather stations, industrial plants, process control installations, household appliances, laboratory measurements, etc. Its application allows high-accuracy measurements in a wide variety of environments, often inaccessible to humans. The air temperature sensor can be closed or open. It depends on the conditions of its use. They also differ in the very principle of the measurements made. The speed and accuracy of this device depends on this. It is also necessary to note the design features, they are as close as possible to the working conditions.
For convenience, different types of sensors can be classified according to how they work. Depending on this changeall the main characteristics of this device.
- Depending on the ambient temperature, the internal resistance of materials will also change. This property has long been noticed by the developers of the so-called thermoresistive elements. Over time, the quality of these devices improved due to the use of more and more advanced materials as an active element. This type of air temperature sensor operates in a wide measuring range. Such devices perform well in low-current circuits and are in good agreement with electronic circuits, which simplifies the development of signal processing equipment. The disadvantages include non-linearity of the characteristic and low accuracy in measurements.
- If you use a semiconductor element instead of a thermistor, you can
- Thermoelectric converters have good performance characteristics. 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 measuredtemperature.
to achieve a significant increase in the accuracy of measurements. This property was incorporated into devices of this type. The outdoor temperature sensor, in which a semiconductor operates as an active element, has only one drawback. This is a small measurement range (-55C - +155C).
In addition to the above, there are also so-called pyrometers and acoustic sensors. The former are used for remote measurements of heated bodies, while the latter are used for measuring gaseous media of various temperatures.
As you can see, air temperature sensors come in a variety of designs, and their operation is designed taking into account all the technical characteristics of the device. They work well with modern electronic equipment and are used in a wide variety of applications.
