7 Best Hygrometers For Grow Room: Reviews & Guide

As an Amazon Associate I earn from qualifying purchases. Without Any Extra Cost to You!

All conditions in a Grow room needs to be maintained within the right ranges. Humidity is one of those critical conditions.

However, you need to get a hygrometer that gives accurate readings at all times.

But if you are not an expert, this can be a problem. You won’t differentiate between a good and bad hygrometer.

In this article, we will share with you the 7 best hygrometers to buy for your Grow room. Out of the 7, the following is our top pick. Buy it now from Amazon.

Our Top Pick: AcuRite Digital Hygrometer

Best Hygrometers For Grow Room

We will begin with the best hygrometer you will ever find in the market. It’s by far the best hygrometer you will find for indoor use.

The hygrometer doesn’t only monitor humidity but also temperatures. With it, you will maintain the right environment for your grow area.

One thing you will love about this hygrometer is its accuracy – the most crucial feature to consider in a hygrometer. With it, you will get accurate readings of the humidity levels.

AcuRite Digital Hygrometer has high-level sensors to read humidity levels for the outdoor environment every 10 seconds.

This hygrometer measures 1 to 99% relative humidity in your grow room.

For ease of monitoring, it comes with numbers and a color-coded bar to show when humidity is right, low, or high.

Click here to check the latest price and buy it from Amazon now.

What Exactly Is A Hygrometer?

In lay man’s language, an hygrometer is a humidity meter – a gadget that measures the amount of water vapor in the air.

The meter can also be used to measure moisture in the soil and other confined spaces such as grow rooms.

Types Of Hygrometers

In the market, you will find three types of hygrometers. They include dewpoint hygrometers, electrical hygrometers, and psychrometers.

  • Electrical Hygrometers

These are digital hygrometers that uses either capacitance or resistance to measure water vapor in the atmosphere. The hygrometers are either capacitive or resistive.

Capacitive hygrometers have two metal plates with air between them. The plates’ capacitance get affected by the moisture in the air. Therefore, the ability of the metal plate to store electric charge indicates amount of humidity in the air.

On the other hand, the resistive hygrometers uses a ceramic material  exposed to the atmosphere to pass electricity. When the humidity goes up more water vapor condenses at the ceramic material affecting resistance. As a result, the hygrometer delivers accurate humidity measurements hence affecting the current flowing through the ceramic material. As a result, it indicates the level of humidity in the atmosphere.

  • Psychrometers/Analog Hygrometers

These are analog hygrometers that uses thermometers and dry and wet bulbs. There are 2 thermometers in the hygrometer.

When evaporation takes place on the wet bulb, it lowers its temperature to a lower level as compared to the dry one. The evaporation of condensation on the wet bulb is caused by the difference in humidity.

The hygrometers are effective in measuring moisture in the air, grow room and outdoor.

  • Dew Point Hygrometers

These are hygrometers used to measure water vapor saturation in the air. They are effective in measuring small amounts of moisture. And they are the most accurate of all hygrometers.

7 Best Hygrometers For Grow Room

The following are the best hygrometers for Grow room. Choose the one that best suits your needs and buy it from Amazon.

1. AcuRite Digital Hygrometer

AcuRite Digital Hygrometer

We will begin with the best hygrometer you will ever find in the market. It’s by far the best hygrometer you will find for indoor use.

The hygrometer doesn’t only monitor humidity but also temperatures. With it, you will maintain the right environment for your grow area.

One thing you will love about this hygrometer is it’s accuracy – the most important feature to consider in an hygrometer. With it, you will get the accurate readings of the humidity levels.

AcuRite Digital Hygrometer has high-level sensors to read humidity level for outdoor environment every 10 seconds.

This hygrometer measures 1 to 99% relative humidity in your grow room.

For ease of monitoring, it comes with numbers and a color-coded bar to show when humidity is right, low, or high.

And with this hygrometer you can monitor humidity changes within 24 hours. It displays historical data of the highest and lowest humidity levels for a period of 24 hours.

In short, this hygrometer will give you everything you would need for monitoring humidity in your Grow room.

Key Features

  •         High accuracy rating of +/-2% range
  •         Records low and high humidity within 24 hours
  •         Easy to use

AcuRite Digital Hygrometer is available on Amazon. Click here to check the latest price and buy it from Amazon today.

2. ThermoPro TP63 Digital Wireless Hygrometer

ThermoPro TP63 Digital Wireless Hygrometer

One thing we will be grateful to technology for is the convenience it brings. ThermoPro TP63 Digital Wireless Hygrometer is not left out in technological advancements.

This is a great digital hygrometer. You can use it in your grow room or outdoor farming.

The hygrometer comes with a rechargeable sensors and professional-grade to guarantee accurate readings. These sensors refresh at a rate of 50 seconds to give you relevant and accurate readings at all time.

With ThermoPro TP63 Digital Wireless Hygrometer you will detect humidity from 1 to 99%.

For convenience, you can monitor and track humidity in up to 4 different locations at a distance of around 60 meters.

The design of the hygrometer gives reliability and durability even when used for outdoor purposes. Thanks to the weather-proof case, tough construction and cold-resistant lithium-ion battery.

For ease of use the hygrometer comes with a backlit display. You can clearly see and take readings from the hygrometer even at night.

The hygrometer can also monitor temperature. With it, you can switch from Celcius and Fahrenheit.

This is by far the best digital hygrometer you will find in the market.

Key Features

  •         Weatherproof sensors
  •         Very accurate
  •         Wireless digital monitoring

ThermoPro TP63 Digital Wireless Hygrometer is available on Amazon. Click here to check the latest price and buy it from Amazon now.

3. Cigar Oasis Analog Hygrometer

Cigar Oasis Analog Hygrometer

There is a satisfaction that comes from using analogue equipment. They give classical experience in everything you do. It get’s better if the equipment is accurate.

And this is exactly what Cigar Oasis Analog Hygrometer offers.

This is a handy device that manually measure relative humidity in your grow room. It’s known as the most accurate analog hygrometer you will find in the market today.

The hygrometer comes with a secure magnetic backing for ease of installation in your grow room. All you need to do is attach it to a magnetic metal surface.

Its construction is made of an aluminum case. This means it’s lightweight and resistant to rust and corrosion. The glass face is scratch and fog-resistance.

In short, this is a durable hygrometer that will stand test of times.

So, if you are looking for an analog grow meter that will deliver excellent performance, look no further. This is the real deal.

Key Features

  •         Accuracy level of +/- 1%
  •         Scratch and fog resistant glass
  •         Strong and durable aluminum casing

Cigar Oasis Analog Hygrometer is available on Amazon. Click here to check the latest price and buy it from Amazon now.

4. Habor Hygrometer

Habor Hygrometer

Here is one of the popular hygrometer for Grow rooms. If you check it on Amazon, you will see how many people are talking about it. All this because it delivers an amazing performance.

Habor Hygrometer sleek body design makes it perfect for Grow tents. It doesn’t occupy much space inside your tent.

The hygrometer comes with 24 sensitive vents to provide accurate readings. The readings on this Grow tent refreshes every ten seconds.

For ease of use, it has a large LCD display with a backlit. With it, you won’t struggle to read your temperatures. The backlit enables readings both day and night.

Key Features

  •         Pocket size to maximize space usage
  •         Highly reliable
  •         Easy to use

The hygrometer is available on Amazon. Click here to check the latest price and buy it from Amazon today.

5. Xikar PuroTemp Rectangular Digital Hygrometer

Xikar PuroTemp Rectangular Digital Hygrometer

Here is an hygrometer that’s ideal for any first timer. Thanks to it’s ease of use. It only have three-buttons that will help you calibrate it easily.

For mounting, it comes with a magnetic back. It also has a metal mount with adhesive backing.

When you think about all the other functionalities, this hygrometer will deliver everything you would wish to get from an Hygrometer.

Key Features

  •         Max/min display feature
  •         Accurate
  •         Durable

Xikar PuroTemp Rectangular Digital Hygrometer is available on Amazon. Click here to check it’s latest price and buy it from Amazon now.

6. HygroSet II Round Digital Hygrometer

HygroSet II Round Digital Hygrometer

Here is another accurate hygrometer. Its accuracy level is at +/- 2%. With it, you will get a reading of the exact humidity in your Grow room.

For ease of use, it comes with a digital display with large numbers. From afar, you can easily read the numbers on this digital hygrometer.

Like all the other digital hygrometer we have shared in this article, this hygrometer also delivers an amazing performance.

Key Features

  •         Accuracy level of +/-2
  •         10 second refresh rate
  •         Easy to use

HygroSet II Round Digital Hygrometer is available on Amazon. Click here to check the latest price and buy it from Amazon now.

7. Ambient Weather WS-3000-X3 Thermo-Hygrometer

Ambient Weather WS-3000-X3 Thermo-Hygrometer

We close our list with yet another amazing wireless monitor hygrometer. It’s an hygrometer that’s perfect both for indoor and outdoor use.

The hygrometer comes with multiple feature to give you the best experience in monitoring humidity. And this shouldn’t mislead you to think that the hygrometer is ineffective. It’s by far the best hygrometer you will find in the market.

Key Features

  •         Remote sensors
  •         Full color display for ease of use
  •         Uses PC software for advanced data analysis

Ambient Weather WS-3000-X3 Thermo-Hygrometer is available on Amazon. Click here to check the latest price and buy it from Amazon now.

Factors To Consider Before Buying Any Hygrometer For Your Grow Room

We already saw that there are different hygrometers in the market. With this said, there are factors that you need to consider to ensure you get the best hygrometer from the market.

So, to ensure you make a good choice, there are factors you need to consider.

The following are some critical factors you need to consider before buying any hygrometer from the market.

Accuracy

Accuracy of the hygrometer should be the first thing to think of when buying an hygrometer. This is because if you don’t get an hygrometer that gives accurate reading, your farming will be affected.

Grow rooms require a certain level of humidity. You can’t take the chances of miscalculating the accuracy of the humidity in the grow room.

If you get an hygrometer that doesn’t give accurate readings, your plants will end up suffering huge loses.

With an accurate hygrometer you will know when to raise humidity in the grow room.

Hygrometers come with accuracy ratings and ranges. The best hygrometer should have a sensor accuracy rating of +/-1%  to +/-4%. Any other hygrometer that doesn’t lie within this range shouldn’t be used in grow room.

Without any doubt, we recommend all the above hygrometers to you. They will deliver amazing accuracy.

For the best performance, go for hygrometers with 1% rating.

Ease Of Use

It won’t matter how good an hygrometer is if you can’t use it on your own. This means you will spend most of your time trying to figure out how it’s used. And worst of all, you might misjudge the readings.

A good hygrometer is easy to use. You can buy, set it up and take readings without asking for help.

Look for hygrometer with a large display. A large display will help you read temperatures with ease. It’s buttons and other accessories should be easy to operate.

We recommend you check all features of the hygrometer you choose to use. Look at their manual and ensure you are comfortable taking readings with it.

It won’t be worthy having it if you can’t use it on your own.

Battery Life

How long will your hygrometer last without the need to recharge it. This is another critical factor you need to consider. You don’t want to buy a hygrometer that won’t will need recharging after every few minutes.

Also, look at how long the battery will last. Some hygrometers have batteries that can last for many years without the need of replacement. Other hygrometer batteries will need regular replacement. This will increase your cost.

Look for an hygrometer with a long lifespan batteries.

Portability

This is a critical factor if you have multiple grow room. Instead of buying hygrometers for every grow area, buy one that you can use in all grow rooms.

Portability is a factor you can consider if you own multiple grow rooms.

Design

You need to consider the design of the hygrometer you choose to use. Best hygrometers come with designs that allow you to place them anywhere you would wish to and still get accurate reading.

Extra Features

Look for features that are effective necessary for your case. Some of the features to consider are;

  •         Multiple mounting options
  •         Recording of minimum and maximum reading
  •         Remote monitoring
  •         Rugged design for withstanding outdoor harshness

The idea is find features that will make humidity reading easy and fun for you. Some of the features are necessities while others give you convenience of using an hygrometer.

Parting Shot

It takes right humidity to get the best yields from your Grow room. And this is why you need hygrometer to monitor the level of humidity.

Choose one of the 7 hygrometers we have shared with you on Amazon. Without any doubt these hygrometers will give you excellent humidity monitoring.

You will also need to read the following articles to learn how to raise and lower your humidity level in a Grow room.