In order for you to be able to handle your humidity sensors effectively, you may need to have some semblance of an idea on how they work. And this is not really all that difficult. You do not need Einstein's brains to help you figure it out at all. For a beginner, you may not necessarily need all the knowledge in physics and math to be able to understand how these innovations work.
Sensors, in general, are very useful in the sense that they get a lot of information that we cannot normally perceive or quantify with our normal human senses. In the case of humidity, it might suffice for us to say that it is a very humid day, but to get an exact reading that we can monitor may be too taxing and beyond our direct capabilities. This is where machines come in. The degree of uncertainty that our human senses fail to eliminate can be more or less wiped away by your trusty humidity sensor.
In essence, you will just need to familiarize yourself with the thermocouple. This is the main mechanism that operates in most of the humidity sensors available in the market today. These thermocouples make relative humidity measurements. In reality, the humidity sensors don't measure the true value of the humidity. Rather, it makes use of relative humidity values through the medium (that is, thermocouples). A thermocouple makes use of a hot bath and cold bath and compares the relative deviation of the humidity in the environment as compared to these two extremes.
The values that the humidity sensors will get from the two extremes are then computed. Some humidity sensors are paired with a corresponding air humidifier or air dehumidifier function that will help regulate the humidity by a set amount should it tend to go to the extreme. Another tool that you can familiarize yourself with in understanding the mechanism of your humidity sensor is the thermistor. This thermistor enables the sensor to get the measurements of relative humidity directly from your environment.
Each type of relative humidity measuring device built into your sensor has a connection to the data logger. This data logger serves as the meter for your sensors. It projects a human-friendly measurement, and helps you control the humidity levels in your room. The output that you see, usually on the digital screen, is a result of this complex set of processes in obtaining direct values from relative measurements.
Humidity sensors are really useful, especially if you find that the extremes in the weather can cause you much discomfort or allergies (even asthma attacks are caused by weather changes, which can be very dangerous). And if you are able to maneuver through it, you will find that you will be able to maximize your use of it. Since you are now familiar with the nuances of your humidity sensor, you will be able to give it the care that it deserves.