Guide for Choosing a Water Thermometer

guide for choosing a water thermometer for kids, pets or other

Are you looking for thermometers to be used for infants, swimming pools, baths or other similar purposes? This brief guide for choosing a water thermometer will list some of the most efficient thermometers that are made to be used for water. You can find a lot of information about how to choose the right thermometer in this article and our other articles.


KollerCraft TOM Temp Alert Digital Thermometer for Aquariums

KollerCraft TOM Temp Alert Digital Thermometer for Aquariums
  • Digital thermometer for aquariums reliably monitors high and low temperatures
  • Audible and LED notifications when temperatures fall below or rise above presets
  • Presets for a low of 75 degrees F and a high of 82 degrees F
  • For use in both freshwater and saltwater aquariums
  • Plastic probe with suction cup, 3-foot cord

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Quality comes at a price. Even though this thermometer is a little on the costly side, the additional features make it worth it. This thermometer can be utilized for both saltwater tanks and freshwater tanks. It weighs 1.6 ounces and its dimension are 7.5″ x 5″ x 1.5″.

The main screen shows the temperature and notifies you when the temperature rises above 75 to 82°F. You are also provided with the time you were notified at and an audible alert. The thermometer also provides a memory feature through which temperatures can be recorded and saved.

A three-foot cord is used to attach the screen to a plastic probe, which has a suction cup that can be connected to the interior walls of the aquarium. The thermometer requires the use of batteries to function. You can utilize 2 Energizer 357 or 2 LR 44 cell batteries.


  • You get notified when the temperature exceeds the preset limit
  • Comes with an easy-to-read display
  • Provides an accurate temperature reading


  • The preset cannot be changed, so you are bounded by the pre-defined limits
  • Does not come with a plug


TOOGOO Digital LCD Thermometer

Thermometer – TOOGOO(R)LCD Screen Digital Thermometer C / F hygrometer Max Min Memory temperature / humidity Celsius Fahrenheit
  • Memory function displays the value of Max / Min temperature / humidity.
  • LCD screen
  • Backstand for easy reading
  • The LCD screen 2 in 1 thermometer with hygrometer has the selection C / F, memory function for your great assistant
  • LCD Display area: 70 x 30 mm / 2.76 x 1.18in

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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.

This is a basic digital thermometer that comes at a reasonable price. It comes with a 25 x 12 mm display that is connected to a probe using a one-meter cable. Weighing only 3.5 ounces, it is very lightweight and portable. It can easily fit into the palm of your hand. It requires 1 DC 1.5V LR44 cell battery to function, which come with the thermometer when you buy it.


  • It displays accurate temperature readings. The temperature can be displayed in both °C or °F, so you can choose the unit you are more comfortable with
  • It has a sturdy frame that does not get damaged if you drop it by mistake
  • This thermometer comes at such a reasonable price that buying it in bulk for a fairly large aquarium won’t cost you much
  • It comes with batteries. To save the battery life, you can turn off the display when not in use


  • Since it is available at such a low price, it does not come with a lot of features
  • It can be difficult to read the temperature from the LCD. You might need to turn on the light to read the LCD at night
  • Does not come with a plug


Ozeri Turtlemeter – Best All-Around Thermometer

Ozeri Turtlemeter The Baby Bath Floating Turtle Toy and Bath Tub Thermometer
  • Introducing the Turtlemeter, safe and fun for child and mom, a happy bath for your little one!
  • Instantly activates in water, floats naturally and fully submersible.
  • Fun and safe bath toy that doubles as a bath thermometer.
  • Checks the bath water temperature every second and displays it in Fahrenheit on an easy-to-read LCD.
  • Displays the water temperature with 3 screen colors: Blue for Cold, Green for Just Right, and Red for Hot.

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This turtled-shaped toy thermometer is very amusing for little kids. It’s also quite easy to use as the temperature level can easily be read off in digital numbers from the LCD. Furthermore, the LCD displays colors to indicate the temperature. It turns red if the water gets too hot, blue if it gets too cold and green if the temperature is normal.

It provides accurate and fast readings so that you don’t have to constantly worry about the water getting too cold or too hot for your baby. This thermometer is helpful for parents who have to manage more than one kid at the same time. All you need to do to know the temperature is to take a quick glance at the LCD. You can also leave your kids with a babysitter or grandparents without having to worry about them remembering the correct temperature for your babies’ baths.

This thermometer requires 3 AAA batteries to function. The batteries come with the thermometer upon purchase. Since the thermometer will be used in water most of the times, opening and closing the battery housing unit and, thus, replacing the batteries can be a little tricky. If you need to open the thermometer, you will require screwdrivers made for very small screws. These screw drivers are not offered with the thermometer upon purchase.

In order to protect the LCD wiring and other internal parts of the thermometer from water, the outer casing needs to be tightly sealed and secured at all times. Otherwise, the thermometer can get damaged.

If properly handled, the batteries can last a long time since the thermometer only functions when it is put in water.

Kids find this thermometer very entertaining since it has the body and face of a turtle. The thermometer emerges from the water by itself, even if it gets pushed in. The colored LCD makes it easy to note warnings, even if the tub is filled with bubbles.


  • The colored LCD display makes the thermometer very easy to read
  • Cute turtle design
  • Operates even when fully submerged into water
  • Temperature readings are displayed in Fahrenheit


  • Battery housing can be difficult to open and close
  • The unit can turn faulty if the batteries come into contact with water


Etekcity Lasergrip Digital Laser Pool Thermometer

Etekcity Lasergrip 630 Dual Laser Digital Infrared Thermometer -58℉~1076℉ (-50℃ to 580℃) Non-contact Temperature Gun with Adjustable Emissivity & MAX/MIN/AVG Display
  • BETTER ACCURACY+ADJUSTABLE EMISSIVITY: The Distance to Spot Ratio is 16:1, meaning the Laser grip 630 can assure greater accuracy compared with other thermometers with DSR 12:1 or 8:1; Adjustable emissivity improves measurement accuracy across different surface types, just regulate the emissivity of your 630 according to the instruction (0.1-1.0)
  • DUAL LASER+TARGET QUICKER: Dual laser pointers ensure high precision and indicate ideal measuring distance; Measure surface temperature ranging from -58°F ~1076°F / -50°C ~ 580°C, you can choose the unit from °F / °C; Response time: ≤500Ms
  • MULTIFUNCTION: Thermometer with max/min/avg temperatures function; the LCD screen is backlit, it also has an auto-off function and a low battery indicator to extend the battery life so you never accidentally run out of juice (battery included)
  • VERSATILE DESIGN: Infrared technology makes this thermometer handy to measure the surface temperature of various objects especially temperatures above boiling points and below freezing points; Use it for cooking, car maintenance, real estate, Electrical engineering and more
  • NOTE: For best accuracy, the distance between the thermometer and object of Measurement should approximately be 14.17 inches (36cm); Temperature readings from this devices are inanimate objects, the measured temperature for humans or animals will not be correct; FDA, FCC, CE approved; Class 2 laser, optical power 0.3-0.49mW; 2-year warranty by Etekcity

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This thermometer can be a good choice for your pool because there is no need to connect it to any part of the pool. Minimum contact with water means less chances of the thermometer turning faulty. Since it won’t be in contact with water, it will also not be in contact with any chemicals.

You can safely place the thermometer a fair distance from the pool and check the temperature from there. All you need to do is point the laser at the pool; the reading will then be displayed on the digital screen.

The thermometer is multipurpose as well. There are various applications for it. For example, you can check the temperature of something you are repairing or the temperature of a meal when it’s being cooked. Basically, it can be used on almost anything that requires a temperature check. It has a temperature range from -50°Celsius to +380°Celsius.

This 12:1 distance to spot ratio makes this thermometer more precise as compared to many other thermometers available in the market. This implies you don’t need to be standing right at your pool to know the water’s temperature.

Another great point is that you won’t have to stand and wait to get a reading since the laser instantly reads the temperature. It provides faster results as compared to many other pool thermometers. Furthermore, the built-in laser shows you where you are pointing, so you can easily aim at the right target.

The temperature reading is shown on the LCD once you have successfully pointed the laser at your target. The LCD is backlit, so you can easily note the reading regardless of the time of day. Furthermore, the LCD automatically turns off once you are done taking the reading, so your batteries are not used up unnecessarily. The thermometer requires 9V battery to function and since the battery tends to last long, you won’t have to worry about changing it frequently.


  • Comes with a lot of features
  • Direct contact with water is not required
  • Lasts long
  • Can be used for many things


Ambient Weather Wireless Floating Pool Thermometer

Ambient Weather TX-3107 Wireless Floating Pool and Spa Thermometer
  • Floating pool and spa thermometer with LCD display.
  • Seven channel selectable switch
  • Frequency: 915 MHz
  • Dimensions (L x W x H): 100 x 100 x 207.5 mm (3.94 x 3.94 x 8.17 inches)
  • Accuracy: 32 to 104°F: ± 1.8°F

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.

One of the best features of this thermometer is that there is no need for you to be present right beside your pool to get the reading. Since this unit is wireless, you can get the readings on the receiver, which can be installed in your home. The thermometer itself has to be installed in the pool.

All you need to do to install the thermometer is to put the sensor in the pool water. It will keep notifying you with accurate readings of the changing temperature. The sensor keeps floating on the water surface.

The receiver needs to be in search mode. This syncs the senor with the receiver and enables the receiver to receive and display the readings. You can also switch the readings from Celsius to Fahrenheit. The temperature automatically resets every day, so it is easy to note the change in readings on a daily basis. Furthermore, the readings get updated after every minute, so you will always have up-to-date readings.

This data enables you to keep track of the warmth and coolness of the pool water, allowing you to adjust your warming and filtering unit to give you the best saving on power and electricity.

Another great feature is that if you have more than one pool at your home or multiple bath tubs or hot tubs and you need to keep track of the temperature of each of them. all you need to do is get a sensor for each. All these sensors can be synced with the main receiver, so you can view all temperatures from the same place. The 8-channel feature allows you to connect the receiver to 8 sensors. This is extremely helpful as you won’t need to buy multiple thermometers for each pool and tub and you won’t have to go and check the temperature of each of them separately.


  • You don’t need to be present by the pool to get the temperature reading
  • The sensor floats on water
  • 8-channel feature allows you to connect the receiver to multiple sensors


Tips for Choosing the Right Pool Thermometer

Durability is the main feature that everyone looks for when buying a product. You would want the products you purchase to last. The same is true for pool thermometers. However, these thermometers are different than the standard thermometers you use and store back in the box right away. The former measure the temperature constantly and keep providing updates with every passing minute, so there might be a chance that you would have to replace them sometime in the future.

When you plan to purchase a pool thermometer, you would want to choose one that has a lot of features and is reliable. However, a thermometer that comes with better and more advanced features will cost more than one without those features. Hence, your budget will play an important role in deciding the quality of the product.

One tip is that you should choose the thermometer that comes with a good warranty. That way, if something goes wrong with the thermometer and it malfunctions in the first few years of the purchase, the warranty will help you get it replaced or fixed by the company and you won’t have to worry about buying a new one.


Keeping your budget in mind, try to look for a thermometer that offers the best value for your money. Once you have narrowed down your options to the best models in your price range, choose the one that offers the features you want. However, if you do not need any extras, you don’t need to worry about finding the right features.

Solar or Battery-Powered

You can opt for either a battery-powered thermometer that requires batteries to run or a solar-powered thermometer that uses the sunlight as its source of power. However, you need to keep the price in mind while choosing which one suits you best.

Generally, a solar-powered thermometer comes at a greater price than a battery-powered one. Even though solar-powered thermometers will cost you more at the time of purchase, it will save you money in the long run. However, for battery-powered thermometers, while they will cost you less initially, you will need to spend money on replacing the batteries every now and then.


Most pool thermometers are already calibrated before you purchase them. Therefore, you won’t need to struggle with calibrating one by yourself. However, if you think the thermometer is not displaying the correct temperature, you might need to calibrate it. Some thermometers cannot be calibrated again and in this case, you might need to buy a new thermometer.


An important feature that makes monitoring your pool easier is an alarm or notification feature. Many pool thermometers notify you through an alarm if the water gets warmer or colder than the preset values. Thus, if you are too busy to keep an eye on the thermometer readings constantly, getting a pool thermometer with an alarm is recommended for you.

Which Bath Thermometer Is Best for Your Baby?

It is important to choose the right bath thermometer for your infants. This is because their skin is extremely sensitive. As soon as the water gets hot, rashes may start appearing on the baby’s skin. Having a reliable baby bath thermometer enables you to bathe your baby without having to worry about the water’s temperature harming their sensitive skin. This will also help your baby relax and play in water for a longer time, which will help them fall in love with bath time.

The questions you need to focus on before choosing a baby bath thermometer are:

  • What water temperature is ideal for your baby’s bath?
  • How durable should this thermometer be?
  • Do you need a thermometer that can be used for more than just measuring the bath water for your baby?

Also, a bath thermometer that comes with an attractive design is more likely to be liked by the baby and used by you in the bathroom. Therefore, the design of the bath thermometer should also play a role in your choice.

It is important that you purchase a baby bath thermometer that you are likely to use more often and that provides accurate reading because the health of your baby should never be compromised. Look for a thermometer that caters to all your needs and provides you with the best features so that you don’t have to worry about constantly keeping an eye on the water temperature. Make bath time fun for your baby and for yourself!