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The 9 Best Reptile Thermometers And Hygrometers

The best place for your reptile to live is somewhere that looks and feels as much like its natural habitat as possible. Most reptiles need to live in a wet place with a lot of humidity to help them shed their skin and stay hydrated.

The humidity in your reptile's cage is just how much water vapor is in the air. For your reptile's best health, this needs to be carefully watched and controlled.

Using a thermometer and hygrometer is the best way to do this. Different reptiles need different levels of humidity, and a hygrometer can help you keep track of and control the right humidity levels.

Too much humidity can cause mold or skin problems, and too little humidity can lead to problems with shedding, dehydration, or even death for your reptile.

It can be hard to find the right thermometer and humidity gauge for your reptile, but don't worry! BestForPets (bestforpets.org) has done all the hard work and put together this list of in-depth reviews to help you find the best reptile thermometers and hygrometers for your specific needs.


The digital Fluker’s Thermo-Hygrometer

This digital Thermo-Hygrometer from Fluker’s is our top pick overall. It will give you an accurate reading of both the temperature and humidity inside your reptile’s enclosure.

It has an easy-to-read digital display that will help you keep the right levels for your reptile and is safe to use even in places with a lot of humidity. The magic-sticker that comes with it makes it easy to put up and take down.

It has a useful feature that keeps track of your tank’s lowest and highest temperatures, so you can rest easy when you are out or asleep. It also runs on batteries and doesn’t need to be plugged in.

This unit is resistant to water and will work well in places with a lot of humidity, but it is not waterproof. This means that it probably won’t work if it falls off its mount and into water. Some users say that it only works sometimes when the humidity is very high.


  • Digital display that is easy to read
  • Easy to set up
  • Battery-powered
  • Keeps track of both the lowest and highest temperatures


  • Not water proof
  • Can go wrong when humidity is high


Two analog gauges on the Zoo Med

Based on our tests, the Zoo Med Dual Analog Gauge is the best thermometer and hygrometer for the money. It has two analog dials that are easy to read and come in different colors to help you keep the humidity and temperature just right.

With its fuzzy-fastener backing, it’s easy to put together. This makes it easy to clean the enclosure and move it around. The unit is ready to use right out of the box because it doesn’t need batteries or an electrical outlet.

Several users say that when directly compared to a few other units, the readings from this one are off by up to 15%. This may be fine for most uses, but some reptiles need very accurate readings for their best health, so it doesn’t make the top of this list.


  • Inexpensive
  • Simple to set up
  • There’s no need for batteries or a power outlet


  • Some users say the readings are wrong.


Reptile Thermometer Hygrometer REPTI ZOO

This thermometer and hygrometer set from REPTI ZOO may be perfect for you if you want a high-quality product that lasts a long time, is accurate, and is made to last.

It has a digital display on an LCD screen that is easy to read, and it is attached to a strong suction cup with a mechanism that lets you position it how you want.

It comes with two batteries that can work for up to a year. It has a temperature range of 14 to 122 degrees

Fahrenheit, a humidity range of 20 to 99%, and a sampling interval of five seconds, so you can get all the measurements you’ll ever need on a regular basis.

Even though this device is water-resistant, some users say that high humidity causes condensation to form on the screen, which makes it almost impossible to read.

Some users also say that the hygrometer readings are a little off. This, combined with the high price, keeps this product from being in the top two on this list.


  • Digital LED display
  • Suction cup mounting that can be changed
  • Batteries that last a long time


  • Expensive
  • Not completely resistant to water.


Zoo Med TH-31 Digital Thermometer and Humidity Gauge

Zoo Med’s TH-31 digital thermometer and hygrometer has an LCD screen and runs on a battery that comes with it. This unit is special because it has two separate remote probes that can be used to measure the temperature and humidity in different places.

The temperature probe can be used even if it is completely submerged in water because it is waterproof.

With these 36-inch-long probes, you can get very accurate readings and move them around the enclosure in any way you want. It’s easy to set up because it has suction cups on the back.

When tested with other thermometers, the temperature gauge is accurate, but some users say the humidity gauge can be a little off. This could be because the probe wires are a little bit weak and could be broken by bigger reptiles.


  • Readout from a digital screen
  • Little and quiet
  • Probes were included to take accurate measurements in different places.
  • Simple to set up


  • Users say that the humidity readings are wrong.
  • Easily broken probe wires


The digital ThermoPro TP49 Hygrometer

The TP49 from ThermoPro is the most accurate thermometer and humidity sensor on the market, and it updates every 10 seconds. The LCD is small and easy to read because the numbers are big and bold.

The ThermoPro can be set up in three different ways: with a tabletop stand, a magnetic back, or a pole for hanging.

It also has a unique “face icon” that lets you know quickly if your reptile’s enclosure is dry, comfortable, or wet, so you can make the right changes. It runs on batteries, so there’s no need for messy power cords, and the batteries can last for up to 24 months.

Its small size saves a lot of space, but it can be hard to read the screen, especially when the tank is full of condensation. Also, this humidifier is made for general use at home, so it might not last long in a reptile terrarium, which is usually very humid.


  • Compact size
  • There are three ways to mount.
  • Lasts a long time


  • When it’s humid, it’s hard to read the screen.
  • Not waterproof
  • Not made for terrariums in particular


The Inkbird ITH-10 Digital Temperature and Humidity Meter

The ITH-10 thermometer and hygrometer from Inkbird is small, light, and has a digital display that is easy to read. It runs on batteries and is easy to set up thanks to the Velcro backing.

It can measure temperatures from 23 to 140 degrees Fahrenheit and humidity from 30 to 90%, which makes it perfect for a reptile cage.

The small battery is easy to change and doesn’t cost much, but it won’t last that long. Even though this unit won’t take up much room in your reptile’s tank, the small screen can be hard to see when the tank is wet.

Some users say that different units give them different readings that can vary by up to 5%. This means that the readings are probably not 100% accurate. The Velcro attachment isn’t great for tanks with water in them, and many users say it falls off all the time.


  • Little and tight
  • Display that’s easy to read


  • Battery life is shorter than most
  • It can be hard to read on a small screen.
  • Temperature and humidity readings that aren’t right
  • Velcro attachment not ideal for moist environments


For the best reptile thermometers and hygrometers, Fluker’s digital thermometer and hygrometer is the best option overall. It will give you accurate readings and be easy to use because it has a digital display that is easy to read and comes with a magic sticker for easy mounting and removal.

BestForPets (bestforpets.org) has found that the Zoo Med Dual Analog Gauge is the best thermometer and hygrometer for the money. It has two analogs, color-coded dials for use without batteries or electricity, and is quick and easy to set up. It will give you accurate measurements that are easy to understand without breaking the bank.

Buyer's Guide

One of the most important things you can do for your reptile’s health and happiness is to keep track of the temperature and humidity inside its enclosure. Too little humidity can cause dehydration, problems with shedding, or even death.

Your reptile could have breathing problems, mold, and other health problems if there is too much humidity. Hypothermia can happen quickly when it’s cold.

A thermometer tells you how hot or cold your reptile’s cage is. The word “thermo” means “heat.” A hygrometer, whose name comes from the word “moisture,” measures the relative humidity inside the enclosure.

Note that hygrometers measure the relative humidity inside the enclosure, which is the amount of water vapor in the air compared to the most water vapor that can be in the air.

Most of the time, the two are put together into one unit so that both can be measured at once.

When you buy a thermometer and hygrometer for your reptile’s cage, there are a few important things to keep in mind.


It could be said that accuracy is the most important thing. If you know exactly how much moisture is in the air and how hot or cold it is, you can change the settings to meet your pet’s specific needs.

Some reptiles can only live in certain places, while others are a bit more flexible. Still, not every measuring tool is the same, and some are more accurate than others.

But even the most accurate units can be wrong sometimes, especially when it comes to humidity. It’s not unusual for hygrometers to give readings that are off by 2% to 20%. This can happen if the unit isn’t built well, but it can also be caused by other things.

In large terrariums, the humidity levels can be very different in different parts of your reptile’s home.

The movement of the fog and the pumping of water can also cause readings to change all the time. Changing where you put the unit can have a big effect on the reading.

Temperature gauges are much less likely to act up and will usually give you mostly accurate readings. One thing to keep in mind is that warm air can hold more water than cold air can.

This means that as the temperature goes up, the relative humidity will go down, which will change your readings as well.

Make good things.

A reptile’s habitat needs to be moist, which means that there will be a lot of condensation inside the tank. Your thermometer/hygrometer needs to be able to handle both high temperatures and high levels of humidity.

Most of the specially made units are resistant to water because of the high humidity, but they are not waterproof. This means that they need to be securely fastened to the tank so they don’t fall into the water.

Ideal, the screen should be big and easy to read, like a digital LCD. If there is a lot of condensation on the glass of the enclosure, it will be hard to see a small screen, and you don’t want to have to open the tank every time you need to take a reading.

Source of power

A battery-powered unit is easy to use, and small, and there won’t be any wires coming into your reptile’s cage, which can be messy and dangerous.

Most battery-powered devices have simple LCD screens that don’t use much power, so the battery should last for months. Another good thing about these units is that they are small and easy to set up and take down.


Price is always an important factor, but like most things, you usually get what you pay for. Spend the extra money to get the most accurate unit you can if you have a pet whose levels need to be closely watched.

Author Image

Dr. Deborah Fletcher

Deborah R. Fletcher, DVM, is a skilled veterinarian with more than 15 years of experience dealing with companion and exotic animals. She has experience caring for a variety of animals, including household cats and dogs, reptiles, birds of prey, and even primates. Dr. Fletcher is a valuable part of the BestForPets team, where she contributes to their aim of providing pets and their owners with the finest possible treatment and services.

Veterinarian (DVM) Dr. Deborah Fletcher


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