We all understand how important it is to maintain optimal humidity indoors, especially where the child lives. After all, his health depends on this. There are too many allergens in the dry, dusty air of apartments, and a damp room can bring your baby to chronic diseases. But how to measure the humidity in the room? We’ll talk about this today.
How to measure humidity with a glass
Of course, if you do not have a special device, you can use the old way. To do this, a glass filled with water should be placed in the refrigerator until the water cools down to a temperature of -5 ° C (this is the average for a refrigerator). Then put this home-made instrument for measuring the
humidity in the room away from the battery and watch it. The walls of the glass fog up, but if after five minutes they are dry, there is insufficient humidity in the room. If, after this time, they become foggy, the indicators are normal. But the water flowing down the walls in streams, signals that the room is too damp.
But you understand that such indicators are too rough. In order to establish the exact numbers, a hygrometer is needed. There are several types of these devices.
Instrument for measuring air humidity: thermohygrometer
This is a rather complicated device that measures not only humidity, but also room temperature. In addition, the thermohygrometer shows the indicators measured at different ends of the room: where the sensor is attached, and at the installation site of the device itself.
The digital thermohygrometer cable has a length of 1.5 m, and the range of indicators is from 0 to 90%. Wireless devices, among other things, are also equipped with an alarm function in case of a critical condition of humidity in the room.
The principle of operation of the hair and film hygrometer
The hair hygrometer is based on synthetic fat-free hair, or rather its ability to change its length depending on the state of the air. It is pulled between the end of the arrow and the spring. Fluctuations in its length make the arrow move on the dial. This device for measuring air humidity is able to determine it in a wide range (from 0 to 100%), it is easy to use, it can be attached to the wall.
The film hygrometer has a sensor element made of an organic film. It stretches or contracts with changes in humidity indicators. Changes in the position of its center are transmitted to the arrow.
Under low temperature conditions, these two types of hygrometer are the main instruments for measuring the level of humidity.
How to make the right choice
Which hygrometer to choose: wall-mounted, desktop, mechanical or digital, is up to the buyer to decide. But when buying, you must follow a few rules.
- First of all, decide how much accurate data you need, because there are models that can measure absolute indicators, and those that show relative results.
- Think about the place where your instrument for measuring air humidity will stand or hang.
- Check its configuration: a high-quality device should have indicators and a psychometric table.
- Do not forget the check. So you can always return low-quality goods.
Have a good shopping!