Editor's Choice - Our Favorite Amer Thermal Instruments Aquarium Thermometers

1. American Thermal Liquid Crystal Aquarium Thermometer Vertical Small

User Ratings: 72 7

Amer Thermal Instruments BC002021 First Impressions

"Perhaps it's my fault."

I have to admit I had two reasons for buying six. It is always where yo last put it and it is very easy to see and read. The units each had a battery in place and situated for immediate use. These things are useful for a lot besides pet husbandry, too. This thermometer is spot on accurate. The units each had a battery in place and situated for immediate use. 6 in a pack, extra batteries, easy set up, great price.

  • American Thermal Liquid Crystal Aquarium Thermometer Vertical Small
  • Know your aquarium's temperature at a glance
  • Easy-to-read and accurate thermometer mounts on outside of your aquarium
  • Unbreakable, non-corrosive, and non-toxic
  • Fahrenheit scale
  • Manufacture: Amer Thermal Instruments
  • Editor's Impressions Of The Amer Thermal Instruments BC002021
  • Thermometer Accuracy [star rating='4.3']
  • Quality [star rating='3.7']
  • Value For Money [star rating='4.6']
  • Affordability [star rating='3.5']

Amer Thermal Instruments BC002021 Final Thoughts

"Which is good."

You can glue, tape or simply cover the cords in the tank to keep them discreet. The suction cups work well anywhere I have placed it it has not Fallen. Simple fix, you adjust the thermometer within the suction cup and VIOLA! The digital display itself is easy to read at a glance. I can't say which is the most accurate and don't really care. In the right situation this magnet thermometer is the best available. So versatile, I can read the temperatures literally anywhere.

Overall Score
4.4

[star rating="4.4"]
(384 Points)

Peoples Choice - Other Highly Rated Amer Thermal Instruments Aquarium Thermometers

2. Amer Thermal Instruments Liquid Crystal Vertical Aquarium Thermometer, Small

User Ratings: 73 7

Amer Thermal Instruments BC002021 First Impressions

"Holds a steady 1."

Then is started to give a low reading, and it is not reading the correct temperature. The digital display itself is easy to read at a glance. 6 in a pack, extra batteries, easy set up, great price. I've checked it against two other thermometers that are accurate. One of my aquariums is glass, and the other two are plastic. Place it on your aquarium and you are good to go. My poor fish was in 86 degrees water for a month.

  • Amer Thermal Instruments Liquid Crystal Vertical Aquarium Thermometer, Small
  • Liquid Crystal Vertical Aquarium Thermometer. Miscellaneous Aquarium
  • Manufacturer: AMERICAN THERMAL
  • Manufacturer part number: A-1003
  • Manufacture: Unique Cell Distributors LLC
  • Product Dimensions: 4 x 0.5 x 7 inches; 0.08 Ounces
  • Editor's Impressions Of The Amer Thermal Instruments BC002021
  • Thermometer Accuracy [star rating='4.7']
  • Quality [star rating='4.4']
  • Value For Money [star rating='5']
  • Affordability [star rating='3.4']

Amer Thermal Instruments BC002021 Final Thoughts

"Overall a great buy."

And is easily hidden behind a plant. I came here to give this product a positive review. At least in the first 3 months of use. Excellent working for our bearded dragon tank. The digital display itself is easy to read at a glance. Simple fix, you adjust the thermometer within the suction cup and VIOLA! So much so that I purchased a second set of 6.

Overall Score
4.4

[star rating="4.4"]
(69 Points)

3. Sunsbell Aquarium Thermometer Digital Touch Screen Fish Tank Thermometer with Large LCD Display

Sunsbell 6M1048127R0PHUV First Impressions

"It is within."

Set all six probes up in a terrarium with a constant temp of 88. 82 PER THERMOMETER with battery included. I ordered this guy and it was 6 degrees hotter than the digital! My 50+ eyes cannot read a regular tank thermometer without squinting. I think the people who said the suction cup broke. Excellent working for our bearded dragon tank. It is easy to use and install it'disappears' in your tank it is so unobtrusive.

  • Sunsbell Aquarium Thermometer Digital Touch Screen Fish Tank Thermometer with Large LCD Display
  • Backside temperature sensor can stick on the outside glass of the fish tank prevent water infiltration and electronic Oxidation, compact design with Large Crystal Touch Screen makes it easier to read the temperature far away, stands out among other Fish Tank thermometers.
  • 3.2 large glass screen is larger than most of the thermometers, large temperature display on transparent screen, will not block your view.
  • With an accurate temperature sensor stick on the surface of the fish tank, this Digital aquarium thermometer will display accurate temperature for fish tank, reading from 0°C to 70°C / 32°F - 158°F, accurate to 0.1°.
  • Pull down the red battery cover below the screen, insert battery, close it, stick on and read the tank temperature. press up or down to switch °C / °F.
  • Suitable for different water types such as fresh water, tap water, salty water, marine water and monitors the living temperature for reptile such as lizard, turtle. Also, it can be used for DIY brew beer and wine barrel, terrarium, greenhouse, pet tank thermometer.
  • Manufacture: Sunsbell
  • Product Dimensions: 2.95 x 2.95 x 0.28 inches; 2.82 Ounces
  • Editor's Impressions Of The Sunsbell 6M1048127R0PHUV
  • Thermometer Accuracy [star rating='4']
  • Quality [star rating='5']
  • Value For Money [star rating='3.8']
  • Affordability [star rating='4.9']

Sunsbell 6M1048127R0PHUV Final Thoughts

"Very accurate."

I removed the batteries of the units I wasn't using right away. I have to admit I had two reasons for buying six. I have mine on my 60 gallon cube marine tank. Place it on your aquarium and you are good to go. It is about 6 inches in length and roughly an inch wide. The plastic from the suction cup quickly turned from a clear to a milky white. I used to have a large hang in the side tank that you couldn't miss.

Overall Score
4.0

[star rating="4"]
(1 Points)

4. Penn Plax PP37201 Digital Aquarium Thermometer

User Ratings: 60

Penn-Plax First Impressions

"So far loving it."

So the extra units will always come in handy. The digital display itself is easy to read at a glance. In the right situation this magnet thermometer is the best available. Works well in my betta tank, but provide a couple hours for it to read temp changes. He acted aggressively towards it and so I ultimate ended up removing it due to that. The lid is textured aluminum, and the suction cups don't stick to that. I bought these for my dwc reservoirs.

  • Penn Plax PP37201 Digital Aquarium Thermometer
  • Clear numbers for easy readings
  • Displays Fahrenheit and Celsius temperatures
  • Pressure-sensitive backing mounts outside of tank
  • Manufacture: Penn Plax
  • Editor's Impressions Of The Penn-Plax
  • Thermometer Accuracy [star rating='3.8']
  • Quality [star rating='4.4']
  • Value For Money [star rating='4.3']
  • Affordability [star rating='4.6']

Penn-Plax Final Thoughts

"Great for price."

This doesn't bother me as it ws so cheap. You can glue, tape or simply cover the cords in the tank to keep them discreet. I have to admit I had two reasons for buying six. I have kept aquariums for about 45 years. I just wrote it off as a minor loss. I read some of the 1 star reviews and most of them are not about the product. Since it is a mercury thermometer, it is very accurate.

Overall Score
4.6

[star rating="4.6"]
(3 Points)

5. Towashine Fish Tank Thermometer U Shape Hanging on Temperature Monitor Gauge for 6mm Thick Glass Aqu...

Towashine First Impressions

"And he is a betta."

89 I could buy Six Thermometers with Six included batteries. I used these on a number of my aquariums that have discus fish in them. I don't think i'll ever be able to trust a digital thermometer again. This doesn't bother me as it ws so cheap. Place it on your aquarium and you are good to go. This thermometer is spot on accurate. When and if we run out of this batch, I'll instantly order another batch.

  • Towashine Fish Tank Thermometer U Shape Hanging on Temperature Monitor Gauge for 6mm Thick Glass Aquarium
  • U shape design is convenient to use and you can hang it on fish tank, no need suction cup
  • Fit for 6mm thickness glass fish tank, 5.9" in length
  • Temperature range from 0℃ to 40℃
  • Made of high quality glass and easy to read accurate numbers
  • Great for fresh water and salt water
  • Manufacture: Towashine
  • Product Dimensions: 5.91 x 0.02 x 0.02 inches; 1.23 Ounces
  • Editor's Impressions Of The Towashine
  • Thermometer Accuracy [star rating='4.1']
  • Quality [star rating='4.6']
  • Value For Money [star rating='2.7']
  • Affordability [star rating='3.6']

Towashine Final Thoughts

"Great price too."

I have it in both my aquariums now. This company is taking the long term view of how to do business right. I can't say which is the most accurate and don't really care. I read some of the 1 star reviews and most of them are not about the product. We are using them to measure various temperatures inside and outside of a motorhome. I have to admit I had two reasons for buying six. The non-working ones still provide 2 batteries each AND.

Overall Score
3.6

[star rating="3.6"]
(2 Points)

6. uxcell 18 to 34-Degree C Plastic Fish Tank Thermometer Sticker

User Ratings: 32

uxcell a13082400ux0472 First Impressions

"Versatile."

89 I could buy Six Thermometers with Six included batteries. I don't think i'll ever be able to trust a digital thermometer again. You dont HAVE to stick the display onto your tank. The suction cups work well anywhere I have placed it it has not Fallen. It worked great and I highly recommend it! And I just really started to doubt it. This thermometer is spot on accurate.

  • uxcell 18 to 34-Degree C Plastic Fish Tank Thermometer Sticker
  • Product Name : Aquarium Thermometer Sticker;Color : Black, White
  • Material : Plastic
  • Size : Rectangle: 13 x 1.9cm/ 5.1" x 0.75"(L*W);Round: 5cm/2"(Diamater)
  • Weight : 2g
  • Package Contents : 1 × Aquarium Thermometer Sticker
  • Manufacture: uxcell
  • Product Dimensions: 5.07 x 0.74 x 0.12 inches; 0.32 Ounces
  • Editor's Impressions Of The uxcell a13082400ux0472
  • Thermometer Accuracy [star rating='3.8']
  • Quality [star rating='4.8']
  • Value For Money [star rating='4.4']
  • Affordability [star rating='3.8']

uxcell a13082400ux0472 Final Thoughts

"7 reading."

This doesn't bother me as it ws so cheap. In this scenario it would probably get knocked loose a lot. This temperature read a perfect 32 degrees. I got the second one as a bonus that I'm now using in my old tank. If the digital display starts to get dim, it's time for a new battery. I got root rot after light leaks and high water temps. So the extra units will always come in handy.

Overall Score
4.1

[star rating="4.1"]
(4 Points)

7. AURYNNS Pet Thermometer Dog Thermometer, Fast Digital Veterinary Thermometer, Pet Thermometer for Do...

User Ratings: 61 9

AURYNNS First Impressions

"So glad i got these!"

My 50+ eyes cannot read a regular tank thermometer without squinting. When I set up my newest tank I will be getting another one of these. I just wrote it off as a minor loss. I tested this in a cup crammed full of ice and some water. The plastic from the suction cup quickly turned from a clear to a milky white. If the digital display starts to get dim, it's time for a new battery. I have bought many many temperature gauges for my various fish tanks over the years.

  • AURYNNS Pet Thermometer Dog Thermometer, Fast Digital Veterinary Thermometer, Pet Thermometer for Dogs, Cats, Horse,Cattle, Pigs,Birds, Sheep.(Battery Included)
  • Fast Pet Thermometer for all pets. Accurate to within +/- 0.2°F.
  • Measure pets temperature in anus, not in Ear or Mouth.
  • LCD display & Memory function
  • An alarm will sound if temperature is exceeded.
  • ℃ and °F switchable, easy to read.
  • Manufacture: AURYNNS
  • Item Weight: 5.6 ounces
  • Product Dimensions: 7.87 x 4.33 x 1.38 inches
  • Batteries: 2 AAA batteries required. (included)
  • Editor's Impressions Of The AURYNNS
  • Thermometer Accuracy [star rating='4']
  • Quality [star rating='5']
  • Value For Money [star rating='4.2']
  • Affordability [star rating='3.7']

AURYNNS Final Thoughts

"Very accurate."

I've checked it against two other thermometers that are accurate. The suction cups work well anywhere I have placed it it has not Fallen. I don't think they are backlit but for the price they are still nice. 89 I could buy Six Thermometers with Six included batteries. All were Close enough for a fish tank and other uses. Since adding one of these, it has been much easier to monitor the temp of my tanks. 6 in a pack, extra batteries, easy set up, great price.

Overall Score
4.2

[star rating="4.2"]
(183 Points)

8. uxcell Liquid Crystal Aquarium Fish Tank Fishbowl Thermometer Strip Sticker Black

User Ratings: 52 22

uxcell 18156 First Impressions

"Changed to 5-stars now."

The suction cups work well anywhere I have placed it it has not Fallen. 82 PER THERMOMETER with battery included. So far I've been very thrilled with these. Sure enough the digital thermometer was way off by 6 degrees! The units each had a battery in place and situated for immediate use. So the extra units will always come in handy. So far, they're all doing their job in my four tanks and I am quite content.

  • uxcell Liquid Crystal Aquarium Fish Tank Fishbowl Thermometer Strip Sticker Black
  • Product Name :Aquarium Thermometer
  • Temperature Measurement Range: 18degree ~ 34degree
  • Size: ~13(L) x 1.9(W)cm
  • Adhesive by the back, just peel off the tape and attach to outside /surface of aquarium
  • Different temperature with different color
  • Manufacture: uxcell
  • Product Dimensions: 0.3 x 3.3 x 7 inches; 0.16 Ounces
  • Editor's Impressions Of The uxcell 18156
  • Thermometer Accuracy [star rating='4.5']
  • Quality [star rating='4']
  • Value For Money [star rating='3.1']
  • Affordability [star rating='3.1']

uxcell 18156 Final Thoughts

"And I am glad I did."

They are within a degree or two of other thermometers I've checked to compare them. It is about 6 inches in length and roughly an inch wide. One being a very expensive digital. My 50+ eyes cannot read a regular tank thermometer without squinting. Bought the two pack of thermometers. And for the price you cant beat it. Just BE CAREFUL WHEN ADJUSTING, IT IS GLASS AND WILL BREAK.

Overall Score
3.6

[star rating="3.6"]
(8 Points)

9. Zonon 15 Pieces Stick-on Digital Thermometer Strip LCD Thermometer Strip Digital Thermometer Strip A...

User Ratings: 54 12

Zonon 813 First Impressions

"And he is a betta."

I've checked it against two other thermometers that are accurate. So much so that I purchased a second set of 6. I just wrote it off as a minor loss. I am extremely pleased with this product. Since it is a mercury thermometer, it is very accurate. When I set up my newest tank I will be getting another one of these. Ambient room temperature measures 72.

  • Zonon 15 Pieces Stick-on Digital Thermometer Strip LCD Thermometer Strip Digital Thermometer Strip Adhesive Crystal Temperature Strips Aquarium Sticker for Aquarium Display
  • Quantity of liquid crystal thermometer: 15 pieces digital temperature strips in total, each measures approx. 13 x 1.8 cm/ 5.12 x 0.71 inches (LW), proper size to use
  • Clear temperature scale: simply designed with clear scale, 2 different temperature readings for you, one is Celsius reading, ranges from 18 - 34 degrees Celsius, the other one is corresponding Fahrenheit reading, ranges from 64 - 93 degrees Fahrenheit, suitable for different groups of people
  • Convenient to read: 3 colored marking that can indicate the temperature situation, which can change with the water temperature, each color represents different water temperature condition, they can be seen clearly and quickly from the surface
  • Easy to use: the thermometer strip is self adhesive one, you can directly stick it to the outside part of fish tank, better to be pasted below the water level, not applicable in the water, you can check the temperature condition of fish tank at any time
  • Applicable occasions: suitable for wine bottles, baby bottles, fish tanks, bath water, you can get the accurate reading, green color represents current temperature, blue color represents a bit lower temperature, brown color represents a bit higher temperature
  • Manufacture: Zonon
  • Editor's Impressions Of The Zonon 813
  • Thermometer Accuracy [star rating='3.3']
  • Quality [star rating='4.9']
  • Value For Money [star rating='3.5']
  • Affordability [star rating='4.3']

Zonon 813 Final Thoughts

"1 degrees F at all times."

Since it is a mercury thermometer, it is very accurate. For the price I'll probably end up putting these in all of my aquariums. I came here to give this product a positive review. We are using them to measure various temperatures inside and outside of a motorhome. The only reason I didn't give this 5 stars is because my betta fish didn't like it. 49 thermometer that is 100% accurate. This company is taking the long term view of how to do business right.

Overall Score
4.0

[star rating="4"]
(55 Points)

10. VIVOSUN 4-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction C...

User Ratings: 69 3

VIVOSUN First Impressions

"Appears to be accurate."

This is how you calibrate a thermometer. So much easier than the ones that hang on the inside. It is about 6 inches in length and roughly an inch wide. I used these on a number of my aquariums that have discus fish in them. In the right situation this magnet thermometer is the best available. I just wrote it off as a minor loss. Ambient room temperature measures 72.

  • VIVOSUN 4-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction Cup for Turtle
  • HIGH ACCURACY: Temperature Range: -50℃ ~ +70℃ (-58 °F ~ +158 °F); This aquarium thermometer is accurate to +/- 1℃, no matter whether the probe is placed in any corner of this fish tank, an accurate temperature will be displayed
  • LCD DISPLAY: Comes with a large LCD display that is easy to read clearly and accurately
  • ADJUSTABLE UNIT TEMPERATURE: Easy to adjust the temp between Fahrenheit and Celsius displays; Long-press the power button to adjust the unit display
  • TWO SUCTION CUPS: Equipped with two suction cups, one for attaching the cable to the side of the tank and another for attaching the thermometer
  • SUPER LONG CABLE: The cable length connected to the probe is 78.74 inch (2 m) superior to 23.62 inch (60 cm) standard cable length; Allows accurate temperature measurements in even the largest fish tanks
  • 1. Open the battery cover on the back of this thermometer and insert the button battery to ensure the “+” positive electrode is face up;
  • 2. Use one suction cup to attach the back of this thermometer, then fix this unit to the outer of this fish tank, another suction cup is for attaching the cable;
  • 3. Submerge the probe attached cable into the fish tank;
  • Manufacture: VIVOSUN
  • Editor's Impressions Of The VIVOSUN
  • Thermometer Accuracy [star rating='3.7']
  • Quality [star rating='3.8']
  • Value For Money [star rating='4.3']
  • Affordability [star rating='4.7']

VIVOSUN Final Thoughts

"These are great!"

50 thermometers, reads much easier and no suction cup residue, also looks better. The digital display itself is easy to read at a glance. So far I've been very thrilled with these. They reviewed the packaging or shipping by saying it arrived broken. It is about 6 inches in length and roughly an inch wide. The suction cups work well anywhere I have placed it it has not Fallen. I'm pretty sure those reviewers have acrylic tanks.

Overall Score
4.5

[star rating="4.5"]
(627 Points)

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