Nowadays, there are different kinds of hygrometer available and the way they function depend on their design. One of the popular types of hygrometer is the capacitive hygrometer. This kind of hygrometer nis created and designed for applications where fragility, price, space are a concern. Hence, they have a risk when it comes to the accuracy of reading moisture. Technically speaking, capacitive hygrometers have the ability to calculate the effect of moisture on a metal oxide material. Usually, this device is used for measuring the impact of humidity on the dielectric constant of a polymer. Furthermore, the sensor of capacitive hygrometer has an accuracy rating of 2% that has a range of 5 to 95 percent relative humidity when calibrated. But when it is not calibrated, the accuracy of measures it provides can be worse. However, the good thing about this kind of hygrometer is that its sensors have the power to withstand high temperatures and condensation effects. This makes the device applicable and suitable for different applications. The problem with capacitive hygrometer is that it has sensors that can be contaminated easily and it easily shows signs of aging.
Another type of hygrometer is the one that has a resistive sensor. Compared to capacitive hygrometer, this kind of hygrometer tends to be less sensitive. The sensors of resistive hygrometer can measure the changes in the electrical resistance of the materials. The good thing about this kind of hygrometer is that they require a complicated circuit board. Thus, the accuracy of the measurement will depend on the resistive material. It also measures how solid the hygrometer against condensation. This is the reason why lots of people tend to choose resistive hygrometer over capacitive hygrometer. It tends to be more accurate and durable.
Indeed, hygrometer is one of the useful devices out there. This has the ability to utilize both calibration and calculation of temperature and pressure changes. It is also helpful in homes and office buildings. It can also be helpful in industrial and manufacturing operations. Basically, the use of hygrometer will depend on its type such as psychrometers, electrical hygrometers, and dewpoint hygrometers. Psychrometers is a kind of hygrometer that has 2 kinds: we and dry bulb. Wet bulb type is used when measuring evaporation which causes the temperature to drop lower compared to the dry bulb. Furthermore, psychrometer is used in measuring outdoor humidity. On the other hand, electrical hygrometer can be capacitive and resistive. The difference between the two has been discussed already earlier. But the main point of difference is that resistive is used when electricity pass through a ceramic substance while capacitive uses 2 plates with air between them. Lastly, dewpoint hygrometer is used in measuring the moisture saturation in a gas.
Overall, when choosing and using hygrometer, there are some factors that you need to consider. One of those is the types of hygrometer. It is crucial that you decide the right type of hygrometer so you can fully utilize it. To help you out, you can check indoor hygrometers reviews here.
