Hygrometers measure the humidity of air or soil. You may want a hygrometer to measure the humidity of the air in a pet’s tank, or perhaps you are completing an experiment that requires a humidity reading. In addition, many people buy a hygrometer to place in their home to monitor the air quality for health reasons. Whatever reason you have for wanting a hygrometer, you have come to the right place for advice on choosing the best device for you.
To save you time and energy, we have made a list of the best hygrometers in 2021. So before you go and spend hours researching, check out these great products we have researched for you.
A hygrometer is an instrument used to measure the humidity or moisture in the air. It is used in meteorological science and galleries to protect artwork and everyday homes to ensure the best air quality. Several major types of hygrometers are used to measure humidity.
Mechanical hygrometer: this measures the contraction and expansion of organic matter that will automatically react in this way to more or less humidity. For example, human hair contracts when it is humid, creating “frizz.” This movement causes a spring to move a needle on a dial.
Electrical hygrometer: this uses lithium chloride to measure lithium’s electrical resistance as the humidity changes.
Other hygrometers sense changes in volume, weight, or the transparency of various materials that react to humidity.
Things to Consider When Choosing the Best Hygrometer
Before buying a hygrometer, it will be helpful to have a list of specifications and features you are looking for. Being prepared will save you time browsing countless hygrometers and save you money on needless features you will not use. See our recommendations of what to consider below.
Outdoor or indoor
Outdoor hygrometers are made for outdoor use and are more weather-hardy and durable than an indoor hygrometer. Choose the right one for the job at hand.
If you want to measure the moisture in the soil, you should buy a soil hygrometer.
Would you prefer an LCD screen with a digital reading or a needle with an analog reading?
If you need to record changes in humidity, opt for a hygrometer that records data at certain intervals programmed by the user. For instance, some devices let you record the humidity every hour. On the other hand, perhaps you want a device that will monitor findings constantly. Either of these hygrometers is available.
If you do not need accurate readings, save yourself some money and purchase a device with a 5% margin of error. If it needs to be accurate, you can spend more and get an extremely accurate device.
If you want to monitor the humidity of a place from a separate location, you will need to buy a hygrometer with a sensor probe or multiple sensors and a console sensor to cover more ground.
A portable hygrometer is useful for quick readings when you are on the move. It would be great for camping.
You might like a device that alerts you when there has been a large change in humidity or when the humidity levels are outside your preferred parameters.
It is important to make sure that the hygrometer you choose is compatible with the power sources available in the location you want to place it. It will need an electricity source or a battery.
If you want to buy a device that sends you the alerts your request, the hygrometer will often need to be connected to a wifi source. Make sure that your wifi reaches as far as you want to place your hygrometer.
You might want to buy a hygrometer that will also tell you the current temperature. This feature normally does not cost much extra money.
How We Choose the Best Hygrometers
To choose the best hygrometers, we rate them on accuracy and extra features. We also compared these devices’ customer reviews and value-for-money.
Hygrometers Price Range
A hygrometer can cost as little as $2 and as much as $1400. The lower end of the spectrum is mostly soil hygrometers, and the expensive end of the scale will have loads of features and is usually portable.
The ThermoPro TP50 Digital Hygrometer measures the humidity of your home or greenhouse every 10 seconds, giving you regular up-to-date readings. It displays the humidity, whether that is dry, comfortable, or wet, and it also displays the temperature. This device is powered by 1 AAA battery which is included. This hygrometer can be placed on a flat surface with an attached tabletop stand or against something metallic as it has a magnetic back. The hygrometer displays the potential humidity and temperature range so you can be prepared for any changes.
Provides a reading every 10 seconds
Good level of accuracy +2%-3% RH
The thermometer takes longer to update than the hygrometer.
The Antonki Humidity Gauge is available in four colors. It comes with an attached tabletop stand and magnets at the back so you can place it on a variety of surfaces. It is powered by batteries that are included. This device will tell you the humidity of the air with a +/-5% RH accuracy. It can read the humidity levels of between 10% and 99%. It will tell you in words if it perceives your environment to be dry, comfortable, or wet to take the guesswork out of knowing what humidity healthy air should be in your home. This device takes reading every 10 seconds to ensure the information you receive is up to date. You get two hygrometers in this set, meaning you can measure the humidity of various rooms in your home.
Set of two hygrometers
It takes a reading every 10 seconds
Available in four colors
Some customers found readings to be inaccurate very rarely.
The Govee Indoor Hygrometer 2 Pack reads both the humidity and temperature in your home. It tells you the range of humidities and temperatures to expect and the current humidity and temperature. The humidity is +/-3%RH accurate and is read every two seconds. This device allows you to set your own parameters of preferred temperature and humidity. Once you have downloaded the compatible app on your phone, you will receive notifications when the humidity or temperatures fall outside these parameters. In addition, you get 20 days of free data storage with this device so that you can keep track of the changes in that time.
Fast updates on readings
Decent amount of accuracy
An app that gives you alerts on your phone about humidity and temperature changes
Some customers find the LCD screen fades in time. However, this is covered by the available warranty.
This pack of mini hygrometers allows you to keep a hygrometer in various locations. It also allows you to give one to various people, whether that be students or colleagues, so you can test the humidity in large areas. This hygrometer will also tell you the temperature in Fahrenheit. The device will take a reading every 10 seconds to keep you regularly up to date. This device is small and will fit in your pocket – great for portable and outdoor use. It has an accuracy of +/- 5% RH. Batteries are included.
The Acurite Digital Hygrometer can be clipped to, mounted, or stood on a surface. It shows the day’s maximum and minimum humidity and resets automatically after 24 hours. It will also let you know if the humidity seems low, acceptable, or high. It can read the humidity levels of between 16% and 98% HR and temperature levels of 0 to 50 degrees celsius. It requires a battery that is not included. This product comes with a limited 1-year warranty.
It can be placed on a surface, attached to the wall, or attached to a metal surface
Shows the days maximum and minimum humidity range
It will tell you if the humidity is high, low, or level
No information about the accuracy levels of this device is available.
Q: Where in my home should I place a hygrometer?
A: When placing a hygrometer in your home, you should place it at the top of your house and away from any doors or windows. This will give you accurate readings on the humidity in your house without being affected by external elements such as rain, wind, sunlight, and snow.
Q: What is a healthy humidity level?
A: A healthy humidity level in your home is somewhere between 30% and 50%. This makes most people feel most comfortable and will feel great on your lungs and skin alike.
Q: How can I tell my hygrometer is accurate?
A: To make sure your hygrometer is working properly, there is a simple technique you can follow. First, wrap the hygrometer in a damp towel for 30 to 45 minutes. Then, quickly unwrap and read the humidity. A perfectly calibrated hygrometer will read 100% humidity. Unfortunately, most hygrometers are not 100% accurate and will read between 80% and 90% humidity.
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