Last Updated: 09 January 2020

Few people know what a hygrometer is, and not everyone knows the benefits that it can bring. First of all, your health, which depends on living conditions and a comfortable microclimate: temperature, air pollution level, as well as humidity parameters. These are not the only temperature and air pollution indicators; there are also humidity parameters. Deviations from the optimal values can lead to serious diseases. This is the main reason why every house or apartment should have the best hygrometer, which will create the ideal living conditions for all family members.

Manufacturers have released a variety of hygrometer models, both in function and cost. You can buy a completely budget device, or choose a digital unit with additional features. After reading our 7 hygrometer reviews of the most popular models, you will know, which one to choose.

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The term hygrometer can be applied to devices of various designs for measuring the humidity in a room or outdoors. The digital hygrometer can measure the temperature outside the window (using a remote sensor), inside the room, as well as the humidity inside. It is popular in both houses and apartments. The price of an indoor hygrometer is low, which makes it affordable for most people.

A modern thermo-hygrometer is additionally equipped with:

  • a thermometer;
  • an indicator of parameter’ changes;
  • a display with date, time, and atmospheric pressure.


With excessive humidity in the house, there will be discomfort when the sheets and blankets touch your body. If the humidity is insufficient, dryness in the nose and throat, frequent headaches, fatigue, and a feeling of “sand” in the eyes may disturb you. If you have kids, then buying a hygrometer thermometer is a necessity. For fragile children's organism, a lack of moisture is hard to live with. Frequent viral diseases in the family are also a reason to think about buying a digital hygrometer.

Quick Comparison
KITCHEN APPLIANCESItem DimensionsItem WeightPriceIncluded ComponentsFeaturesFunctions
TEMP STICK WIFI TERMO-HYGROMETER3.5 x 1.5 x 1.2 inches3.36 ounces$$$(2x AA batteries, included)Remote Wifi Temperature and Humidity Monitor.Monitoring Temperature & Humidity
SENSORPUSH WIRELESS TERMO-HYGROMETER1.6 x 1.6 x 0.7 inches1.44 ounces$$ Add a SensorPush G1 WiFi Gateway (sold separately) for data and alerts via the InternetCan measure multiple temperatures and humidity levels indoors and outdoors
CIGAR OASIS CALIBER IV HYGROMETER3.9 x 0.4 x 1.2 inches1.76 ounces$Secure magnetic mount, Battery includedAdvanced humidity sensor maintains accuracy to +/- 1%
ACURITE INDOOR TERMO-HYGROMETER0.9 x 2.5 x 3 inches3.84 ounces$Strong magnetic backingDigital Thermometer | Monitor indoor temperature (°F/°C) & humidity
AMBIENT WIRELESS THERMO-HYGROMETER5 x 1 x 4.5 inches11.2 ounces$$Audio and visual alarms to indicate when a temperature/humidity level has been reachedCan measure multiple temperatures and humidity levels indoors and outdoors


Temp Stick WiFi Termo-Hygrometer

Temp Stick WiFi Termo-Hygrometer

CHECK PRICE An acceptable battery life for most use case scenarios
Rating: 4.6 / 10

SensorPush Wireless Termo-Hygrometer

SensorPush Wireless Termo-Hygrometer

CHECK PRICE Small and attractive SensorPush sensor
Rating: 4.2 / 10

Cigar Oasis Caliber IV Hygrometer

Cigar Oasis Caliber IV Hygrometer

CHECK PRICE ZX circuit technology
Rating: 4.1 / 10
AcuRite Indoor Termo-Hygromete
AcuRite Indoor Termo-Hygromete
Rating: 4.0 / 10
Check Price
Ambient Wireless Thermo-Hygrometer
Ambient Wireless Thermo-Hygrometer
Rating: 3.8 / 10
Check Price

1 place :



The Temp Stick Wireless thermo-hygrometer is a smart device to help you keep track of the sensitive weather conditions, like humidity and the current temperature. One of the coolest things you get from the Temp Stick is the remote control that will warn you when the temperatures pass a predetermined value. It is compatible with PCs, Android, and iOS, so it can send obtained data to your gadgets.

Q: Can it work with multiple sensors?

A: Each TempStick is an individual sensor with a unique ID, so if you deploy multiple TempSticks, you can give them a name you choose at the setup, or just use the unique ID provided, to differentiate which TempStick you are checking through the app or through the web account via your browser.

Q: Can it be easily mounted on a wall or does it need to sit on something?

A: The unit is small and lightweight. It comes with a strip of Velcro to easily adhere to any surface. The unit can also be placed on any surface.

Q: Can this unit run off of a transformer instead of batteries?

A: No, it requires 2 AA batteries.

Why We Like It?
  • Monitors temperature and humidity remotely
  • Sends text and email alerts
  • Connects directly to Wi-Fi network
  • Accurately monitors weather conditions 24/7
  • Data logging with unlimited history
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2 place :



The SensorPush Wireless Thermometer/Hygrometer is a smart device to easily monitor your temperature and humidity levels via your smartphone and the small and attractive sensor. It offers you an extremely high-end experience, allowing you to use an app that has been specially designed to be straightforward and easy to use while maintaining high aesthetic appeal. With it, you will find an easy and effective way to monitor your space's climate.

Why We Like It?
  • Pairs with your iOS or Android device;
  • Sensors are compact and easy to set up;
  • Keeps track of the climate in your home or office;
  • 325-foot range
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3 place :



Caliber IV Digital Hygrometer has a large screen to display both humidity and temperature. Thanks to its ZX circuit technology, you will not have any problems with reading, and you will be able to find in the device’s memory the records of excessively high or low humidity measurements. The design is slim, and you can choose whether to use Fahrenheit or Celsius.

Q: What % of RH is needed to calibrate this unit? Which kit do I buy: 62%, 75%, or other?

A: Buy the 75% calibration kit.

Q: Where is this product made?

A: These are made in China.

Q: Why does my Caliber IV show ll% as the humidity?

A: It’s “LL”, meaning the relative humidity is less than 25%, too low to give an accurate reading.

Why We Like It?
  • Easy to calibrate at home
  • Needs 10 seconds to update data
  • Measures humidity and temperature
  • Additional protection against humidity or temperature fluctuations.
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4 place :



The AcuRite hygrometer will show you your inside atmosphere, whether it’s your office, home, baby’s room, spa, warehouse, or greenhouse. It is wireless, using 2 AAA alkaline batteries. You can count on the professional accuracy with its manual calibration option that many user like. The display shows you the lows and highs for the last 24 hours and for all time. The parameters are monitored every 10 seconds, and you can put the unit on the tabletop, mount on the wall, or attach to metal using the magnet on the back.

pros +

Manual calibration option Low battery indicator Tabletop, wall, or magnet-mountable design Limited one-year warranty

cons -

Less functionality for the price

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5 place :



Ambient Weather WS-04 has one external sensor for measuring the temperature outside and in the room. These compact gizmos can be hung in different places, and they will show data on the temperature level inside and outside on the miniature display. Developers state that the external sensor is protected from moisture. Two AAA batteries power all elements. The average signal transmission distance is 120 feet. If you have a large house or space, you can purchase several units. One remote control will “read data” from one transmitter on one side, and the second remote will be able to “read” from the second transmitter. This gadget was especially appreciated by motorists.

pros +

Can measure multiple temperatures and humidity levels indoors and outdoors An excellent choice for large homes with many rooms Audio and visual alarms to indicate when a temperature/humidity level has been reached Compact design

cons -

The signal does not pass through the ground or solid metal Cheap plastic Display can easily be scratched

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Mankind has been able to measure humidity for more than two centuries. With the development of science and technology, new versions of the best devices appeared. Today, all models can be divided into the following types.

Types Of Hygrometers


An indoor hygrometer quickly measures the humidity in the room. Its basis is the measurement of the constantly changing resistance in the ambient air. The chloride-lithium electrolyte layer deposited on the plate is supplied with a low voltage from the batteries. This sensor’s electrical characteristics built into the console are constantly changing under the influence of moisture vapor in the air.


Psychrometer in Greek means “cold measurement”. It can be used to measure the temperature and humidity in the air. Its operational principle is based on changing the fluid’s physical properties. During this process, water evaporates. It loses energy; therefore, the temperature drops. Such a decrease is recorded with a wetted thermometer. Before using a psychrometer, you need to know that the evaporated liquid stays near the psychrometer, so this affects its indications.

Its main difference from a hygrometer is in operating principle, because its work is based on changes in the physical and chemical properties of substances when air humidity fluctuates.

Dew Point

Inside the device, there is a metal mirror, which condenses moisture from the injected air that is under pressure. The device measures its weight and determines the level of humidity.


To measure the humidity in a room, many opt for analog hygrometers. It is easy to operate, and its price is less than that of a digital hygrometer. However, its data may have errors. The simplest devices are not certified and do not pass verification in meteorological services. Therefore, in this case, it is impossible to talk about measurement accuracy. The location is important for mechanical research instruments. Most often, wall models are offered, which do not always fit into the interior.


These devices belong to the level of laboratory equipment. They have high measurement accuracy. Their operational principle is measuring changes in-the electrolyte concentration deposited on the control plate.


Typically, such devices are used to measure moisture in bulk building materials and substances, but some devices have the additional function of measuring relative humidity.


With such a device, relative humidity is determined between 30% to 100%. The operational principle is based on the properties of a non-fat human hair to change length, depending on the air humidity in the room. Modern devices often use polymer threads with the same properties.

Weight (Absolute)

This is one of the most accurate analog devices that determines the amount of water vapor in the air in g / m3. The design consists of several U-shaped tubes filled with hygroscopic chemicals that absorb moisture from the air.


Hygrometer Buying Guide — What To Look At?

Humidity measurement devices differ in appearance, function, purpose, and, of course, in price. The cost of hygrometers that are similar at first glance may vary significantly. Buying overly expensive and multifunctional units for home use is also not efficient, and neither is saving on the digital hygrometer for the laboratory. So, what are the parameters to choose from, and what should you take into account?


Before acquiring the most accurate hygrometer, it is necessary to determine the conditions under which it will be used – its basic parameters depend on it. With the wrong choice, you can quickly bring the device into disrepair or steadily get erroneous measurements that do not allow you to create the desired comfort level in your home.

When choosing hygrometers, look for models with a temperature meter, as this will allow you to find the dew point easily. If the device is designed for home or office, it is best to place it on a stand from a kit or on a wall, so that it is always visible.

Home Use

It is unlikely that the utilitarian look of a psychrometric meter will decorate the interior in a luxurious living room. Digital devices are offered in a wide range, so choosing the best option will not cause difficulties. Even relatively inexpensive products are capable of performing several useful functions. The room hygrometer displays the temperature in addition to the humidity level. Consideration should be given to the advantages of additional outdoor sensors. In practice, it may be useful to store measurement results in memory, as well as other additional features.

Cigar Humidors

If you are a cigar lover, you need a humidor hygrometer to make sure you keep your cigars at the correct humidity. A cigar humidor is a storage box for smoking products. Its main task is to maintain an ideal microclimate, which is based on the optimal humidity of 68%-72%. They are made of wood – mainly Spanish cedar or walnut. These options are famous for their ability to absorb and release moisture, and they also have no strong smell mixing with the tobacco aroma. However, not all cigar humidors are equipped with the digital cigar hygrometer. Only the more expensive versions have them. That’s why you need to think about buying an independent digital hygrometer. Be sure to choose the best device for a humidor that fits its size.

Instrument Cases

For owners of some musical instruments, it is very important to protect them from damage. That’s why it’s recommended to keep them in special instrument cases. However, to store them properly, you need to pay attention to the humidity inside the case they are stored in. You need to place a humidity monitor inside the case.


Hygrometers are also used to measure the humidity level in a terrarium. It is glued to the wall from the inside. It can track the change in humidity. If the humidity level is lower than is necessary for the particular type of reptile, put a bathing unit in the terrarium and/or spray the ground with water.


Not only people but also plants want to breathe easily. Place a hygrometer into a greenhouse, and the seedlings will not be frostbitten, and mold fungi will not deprive the long-awaited harvest. For plants growing in a greenhouse, it is very important to create the right conditions. Humidity, like soil, affects the plants’ yield. The ideal humidity level is 50-60% of the soil – 65-85% (depending on the plants).


Budget devices and the middle-class ones can make mistakes in the reading of up to 5-10%. For more accurate units, the permissible error is 1-3%. At the same time, the measurement accuracy drops significantly when approaching the boundary values of 10% and 95%. Furthermore, the accuracy depends on the following characteristics:

The Best Hygrometer in 2019
  1. The range of measurements. For most models of household hygrometers, it is 20% to 80%, despite the fact that the scale indicates from 0 to 100%. If the real room humidity value falls outside this range, then the measurement accuracy deteriorates significantly. More accurate electronic devices measure indicators in the lower limit of 6-15%; for industrial devices this indicator is 2-5%. The upper limit in both cases is 95-100%.
  2. Measurement frequency (relevant for electronic devices). For household models, the value of 10-30 seconds is quite important. The price for room hygrometers performing measurements at the level of industrial models (every 0.5-1 sec.) is unreasonably high, since for everyday use such frequency and accuracy is unnecessary.
  3. Additional functionality. Most devices for domestic use are designed as multifunctional devices that can provide data on temperature, time, and pressure. Some models receive information from external sources. In this case, remote sensors can be installed both in other rooms and outdoors. The most advanced Wi-Fi hygrometer models are synchronized with a PC or smartphones and transmit the collected data to them for statistics or control of heating and humidifying devices.

Power Source And Battery Life

An important factor to consider is whether the unit works from a power source or from a battery. In the latter case, pay attention to the operation time.

Remote Monitoring And Alerts

This is one of the beneficial features, as it gives you the possibility of monitoring the device via an app and get information in real time. You only need to enter some pre-set humidity limits in the house.

Additional Sensor Support

In case you would like to control humidity in more than one room, you should find out whether the device has the possibility of connecting additional sensors to one system for this aim.

User Interface

This is a pure user factor. It takes into account additional functions, such as memorizing values, as well as lights for working in a dark room.

Data Logging

Think about whether you need to store the measurements’ history. If you like to check the past figures, then this criterion is important for you. Some hygrometers store limited amounts of data – others nothing at all.

NIST Certification

If you require a hygrometer with precise measurements to satisfy ISO and other regulatory body requirements, you need one with a NIST certification. This is mainly important for industrial devices.


Remember, well-known manufacturers include mark-up for the brand in the price, although there are models of lesser-known companies that are not inferior in quality to branded hygrometers. Also, consider the features the device is equipped with. The more it has, the higher the price will be.


In order to get the maximum benefit, it is necessary to know how this unit works, what measurements it takes, and decide on the operational conditions before choosing the best hygrometer. In addition, external data plays an important role. In this regard, the best model in our list is Temp Stick WiFi Thermo-Hygrometer with Alarm and Remote Probe, as it possesses all the necessary features and is ideal for any application where humidity levels need to be monitored.

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Best Choice
Temp Stick WiFi Termo-Hygrometer
Temp Stick WiFi Termo-Hygrometer
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Rating: 4.6 / 10
SensorPush Wireless Termo-Hygrometer
SensorPush Wireless Termo-Hygrometer
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Rating: 4.2 / 10
Cigar Oasis Caliber IV Hygrometer
Cigar Oasis Caliber IV Hygrometer
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Rating: 4.1 / 10