Andreas Guitar Universe Logo
This website is a participant in the Amazon Services LLC Associates Program. We are reader-supported. If you buy something through links on our site, we may earn an affiliate commission at no additional cost to you. This doesn't affect which products are included in our content. It helps us pay to keep this site free to use while providing you with expertly-researched unbiased recommendations.
The Best


On Sale Now!
AcuRite 00613 Digital Hygrometer & Indoor Thermometer Pre-Calibrated Humidity Gauge,...
  • Maintain the Right Room Temperature and Humidity Levels: This Hygrometer is perfect to pair with humidors or humidifiers
  • Simple, Easy-to-Read Display: Easily see a snapshot of current conditions at a glance with this temperature gauge and humidity sensor
  • Daily High and Low Indoor Temperature and Humidity Levels: Easily understand your range of conditions in any room with this home thermometer and humidity detector
  • Switch Temperature Readings Between Fahrenheit or Celsius: 32 °F to 122 °F (0 °C to 50 °C)

Read More About Hygrometer

A hygrometer, also known as a water instrument, is a device used to precisely measure the quantity of water present in the air, water, or liquid medium. Normally, humidity measurement instruments depend on certain measurements of other physical quantities like pressure, temperature, density, or a chemical or mechanical alteration in material as water is absorbed. However, most hygrometers are designed differently from these conventional devices. To measure water levels in the air, for instance, it can use non-traditional methods such as microwave radiation detection or its laser counterpart.

On the other hand, a humidity psychrometer relies on microwave radiation to generate a conductive heating element that couples heat to the water molecules in the air. Once the sample's temperature is determined, this measuring instrument can calculate and display humidity levels in accordance with the specific unit of measurement (inches of mercury, a liter of water, etc.). A hygrometer's precision depends on the frequency and the power of microwave transmission employed in generating the heating element, the sample's temperature, and its porosity.

The third type of Hygrometer has incorporated electronics in its mechanism. The digital display shows the humidity level as a result of the process. It uses two thermometers to show the reading of vapor pressure and absolute humidity. To measure the moisture that evaporates, it uses a Bi-metal Oxide sensor coupled with a pair of glasses.

The Bi-metal Oxide sensor senses the moisture vapor when the relative humidity is high. The glass also has a thin layer of mercury gas on its surface, absorbing and measuring the moisture's evaporating. A light source behind the sensor shines infrared light inside the glass, which then passes through the moisture-filled air and converts the infrared light into visible light. The reflected light then reaches the microchips in the sensor, where an electronic circuit calculates the moisture content.

This kind of instrument is called a relative humidity meter. However, the term "relative humidity meter" generally refers to any kind of instrument used for measuring relative humidity. This includes an aquarium thermometer, Hygrometer, and humidity thermometer.

In order to get a reading of how much humidity is present in the room, place the Hygrometer inside a closed enclosure with a fan and an open side. Turn on the fan and let it run for about fifteen minutes to generate enough air movement to measure relative humidity. You need to do this several times to make sure that all parts of the enclosure's interior receive enough air and moisture. Also, this will help eliminate or minimize internal drafts since the gaps will be filled up with water vapor. Once you have the measurement, you can find out whether your climate is too hot or too cold, and the appropriate adjustments should be made in heating and cooling systems.

Relative humidity levels are also indicators of other living areas in the house, such as the bathroom. Take, for example, moist, and high humidity levels indicate a wet basement which will lead to higher energy bills and more maintenance. On the other hand, too many humidity levels indicate a humid living area which can be dangerous, especially for small children. High relative humidity can also contribute to adverse health effects such as headaches, sneezing, dry skin, and a stuffy nose. Relative humidity levels can be easily measured using hygrometers since they come with gauge and alarm features which will warn you if the relative humidity level is too high or too low.

If your Hygrometer shows that your condensation level is too high, you should consider buying a dehumidifier for your home. A dehumidifier is a device that removes excess moisture in the air by collecting it and condensing it into the water, which then drips into a container. Dehumidifiers work by pulling the air in the container through a system of tubes and collecting air molecules through a process called adsorption. The moisture then evaporates into a separate container. The dehumidifier has a built-in cycle that removes extra moisture and turns low humidity into high humidity, thus decreasing condensation levels.