AQUANEAT Aquarium Thermometer, Fish Tank Thermometer, Digital Temperature Test, with Large LCD Display (1 Pack)
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Availability:
In Stock.
Arrives
Saturday, Oct 17
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Size: 1 Pack
Features
- Wide application: Ideal for use in water or high moisture environment like aquarium terrarium, or vivarium; suitable for different water types such as fresh water, tap water, salty water, marine water and etc.
- Easy to read: Comes with a large LCD display that is easy to read clearly. Thermometer size: 2.3" (L) x 1.5" (W)
- Easy to setup: Submerge probe with suction cup can easily be set in water (Submerge probe only, do not submerge thermometer in water) ; Press ''PWR'' for 3 seconds to power off
- Free Battery: 1 PC LR44 button cell battery for each thermometer.
- Wide temperature range: Measure -58F to +158F (-50C to +70C) with accuracy +/- 1C
Description
Temperature Range and Accuracy: Free LR44 button cell, it is durable and replaceable, and can be used for a long time. Press and hold the power (PWR) button to turn on. Press ''PWR'' for 3 seconds to power off Submerge probe with suction cup can easily be set in water (Submerge probe only, do not submerge thermometer in water) The temperature unit can be switched between °C and °F with the button. 1 pc Digital Thermometer 1 pc LR44 Button Cell 2 pcs Suction Cups WARNING — KEEP BATTERIES OUT OF REACH OF CHILDREN · INGESTION HAZARD: This product contains a button cell battery. · DEATH or serious injury can occur if ingested. · A swallow button or coin battery can cause Internal Chemical Burnsin as little as 2 hours. · KEEP new and used batteries out of the reach of children SAFE DISPOSAL — BUTTON/COIN BATTERIES
Brand: AQUANEAT
Special Feature: High Accuracy
Color: black
Age Range (Description): Adult
Included Components: No
Outer Material: Plastic
Display Type: Digital
Unit Count: 1.0 Count
Power Source: Battery Powered
Model Name: A045
Additional Features: High Accuracy
Display Type: Digital
Power Source: Battery Powered
Number of Batteries: 1 LR44 batteries required.
Upper Temperature Range: 70 Degrees Celsius
Response Time: 3000 Milliseconds
Reusability: Reusable
Immersion Depth: 2 Inches
Indoor Outdoor Usage: Indoor
Smart Home Compatibility: Not Smart Home Compatible
Outer Material: Plastic
Unit Count: 1.0 Count
Item Length: 2.3 Inches
Brand Name: AQUANEAT
Age Range Description: Adult
Included Components: No
Model Name: A045
Model: DT-A045^
Manufacturer: AQUANEAT
Part Number: A045^
Color: black
Style Name: Classic
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Oct 17
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 1 Pack
Works great in aquariums and hydroponic garden water.
Reviewed in the United States on June 30, 2026 by Terry McDanel
Size: 6 Packs
I am not sure what temperature the water is. Who am I William Thomson? However, if these things are accurate, my fish are super happy. As it is, the water is neither boiling nor rock solid. Also, the fish are still alive. So, I think it is pretty accurate. Also, I set my heater to 76, and this thing is reading pretty much that. I could not get the suction cups to stick on a couple of my tanks, but I have one that has been stuck for months! (from a previous order). THESE ARE NOT FOR RECTAL TEMPS. I don't know how many times I have to say that. Probably just once, but we shall see.
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Reviewed in the United States on May 29, 2022 by Questionably nuts.
Size: 1 Pack
I had to turn it on and off a few times before it started to work accurately. It was also on in the shipping box. It was reading crazy temps at first but now it is working well. I also put it too close to the aquarium lights at first and it was reading super high, but I moved it to the middle of the tank and it now seems accurate. I did leave it in the tank for about an hour before it really got to an accurate reading. I really Like it now that it is working properly as the suction cups stay mounted and the numbers are very legible. If you want to switch it from tank to tank, I recommend turning it off then turning it back on when it’s in the new tank so that it reads accurately within thirty seconds rather than taking a while to adjust. My only concern is that people said it has stopped working after a few months. I’ve only had it in for like three days so we will see what happens.
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Reviewed in the United States on June 23, 2024 by Ashlyn
Size: 6 Packs
The six pack is incredibly cheap. Comparisons to other less-fragile designs are unhelpful because the cost will always be much higher than this very common design. This specific design is sold under many different names/brands, but clearly, it is the same product (if not from the same production site, it is at least identical tooling/materials/process). ALL brands of this design have a set of known design flaws. The juncture of the cord entry to the case is susceptible to disruption; the tension of the battery spring/contact is subject to fatigue; and the force required to remove/replace the battery compartment cover contributes to a shorter life of the instrument, which may, or may not, be related to the aforementioned battery contact. All of these details indicate that the set of best practices is to install the unit with care for these design limitations: avoid de/reinstallation cycles; avoid removal of the battery cover; avoid variable tension to the wire at the junction to the case; install the control box at an angle conducive to ease-of-viewing (so that there is no need to manipulate the control box to see the readout. All of this contributes to approximating a single installation event with no further touching, tilting, pulling, or pushing. [Consider my description as an unreasonable goal, but I hope that my description will at least set an expectation the product's durability is inversely proportional to the user's divergence from the goal.] Most of the criticisms of this product are based on inappropriate expectations for its design, including the unfounded assumption that its design should allow for relocation and transfer to a series of installations over time. My solution to that problem is to use a different, more robust (and more expensive) instument. Nothing about the product’s marketing suggests that it should be anything but a single, permanent installation. That said, I have successfully dis-integrated and re-integrated these from time to time, with success, but ALSO with care and forethought regarding the fragile points of its design. Reports persist that certain brands of this singular design are better performers than other brands, and it is clear that these reports are speculative and that the reliability factor between brands is within the bounds of the statistical likelihood of failure across ALL brands. I have used approximately 75 of these units over a period of 5 years, of 5 different brands, and my experience is unexceptionally consistent: some units fail more quickly than others, irrespective of brand/source; the risk of failure correlates with the number of times the product is moved or its placement reconfigured. The risk of failure caused by removal of the battery cover is substantially higher than other sorts of manipulation (for example, dropping the box, or tension on the cord). The reason for this is that the removal and replacement of the cover, while a simple task, requires substantial pressure on other parts of the box to provide the leverage for the maneuver, and these random, repeated squeezes of the outer case seem to be associated with deterioration of performance (such a the display). The suction cup threaded to the wire is most likely present to achieve a specific task: to maintain appropriate constant tension (or lack thereof) to the cord with respect to the junction at the case. Whether applied tension is the designer's intended method of installation is not certain. However, use of the suction cup to preserve a steady-state of the cord tension seems to be a successful aspect of installation. The junction of the cord to the probe-head seems uniformly robust and has never been a point of failure in my experience. The fact that the unit comes with an extra battery should not be construed as evidence that the unit is designed to last longer than the life of the first battery. Rather, I consider the extra battery as a bonus in that I hold these in reserve for other applications (it is a commonly used size/voltage in small electronics)…the retail price of the extra batteries alone exceeds the actual cost of this 6 pack of units.
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Reviewed in the United States on August 22, 2022 by MLGdwn
Size: 6 Packs
I used to keep large (90 gal and 75 gal) Cichlid tanks 5 yrs ago then left the hobby. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. Unless you are keeping coldwater fish such as goldfish that can be satisfied and healthy at room temp water, you will still need to heat these little Nano tanks hence you will need to know what the water temp is. 5 or more years ago, the methods used by aquarists to keep track of water temps were primitive by today's standards. Sure....they had digital technology back then but it was pricey and much cheaper to buy those funky 'stick on' thermometers which were often inaccurate to say the least. After reading reviews and shopping around I went with the AQUANEAT Aquarium Digital Thermometer and glad I did. As I needed at least three right off the bat I decided to take advantage of price discounts offered for buying in quantity. For $16.89 I could buy Six Thermometers with Six included batteries. Nice. I have to admit I had two reasons for buying six. Anticipating more aquariums down the road AND anticipating that maybe the quality might be so-so and I'd have a dud or two right away and need a replacement right away. Much to my pleasant surprise....I opened the first three....popped them into the aquariums and they have been operating flawlessly for the last 3 months and accurate as well. I am extremely pleased with this product. It is easy to use and install it 'disappears' in your tank it is so unobtrusive. The digital display is nice and small as well. With a little suction cup it will stick to the side of your tank and it will also 'disappear' as it is also highly unobtrusive and barely noticeable. The digital display itself is easy to read at a glance. You dont HAVE to stick the display onto your tank. The wiring provided is long enough where I actually have located one of my displays in a remote location from the tank so it's not even 'on' the tank. Now I'm not talking six feet or anything like that but this particular tank is on an office desk and I've situated the digital display where it can't be seen on my desk yet I can pick it up and look at it anytime I want. Nice. So far...I must say....SIX Digital Thermometers with SIX batteries INCLUDED working so well ...at least in the first 3 months of use....all for $16.89 plus free shipping ....doing the math...I paid $2.82 PER THERMOMETER with battery included. C'mon...you can't beat that with a stick!AQUANEAT Aquarium Digital Thermometer Fish Tank Water Terrarium Reptile FREE Extra Batteries (6 Pack)
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Reviewed in the United States on July 8, 2018 by Bobby Magic
Size: 1 Pack
It works great! Because of the price, I tested it a few times over a two week period with my digital meat thermometer. It matched each time. Highly recommend!
Reviewed in the United States on May 23, 2026 by Manda
Size: 1 Pack
I picked up this digital aquarium thermometer to keep a closer eye on my tank conditions, and I was able to compare it directly against another thermometer and my tank heater’s built-in digital display. Setup was quick and straightforward—took about 2 minutes total. It comes with the digital thermometer, a corded probe, batteries already installed, and two suction cups. One suction cup was pre-attached, and adding the second was simple. The wired probe makes it easy to place directly in the water while keeping the display visible on the outside of the tank. The suction cups help keep both the display and probe securely in place, and the cord length gives you flexibility with positioning. The display itself is clear and easy to read at a glance, which is important for quick checks throughout the day. It also allows you to switch between Fahrenheit and Celsius depending on your preference. What stood out most to me was the consistency. When compared side-by-side with another thermometer and my heater’s digital temperature reading, this unit read within about 1 degree, which is more than accurate enough for everyday monitoring. That gave me a lot more confidence in using it as a reliable reference. The readings update quickly and begin almost immediately after turning it on—no noticeable lag. This is a great, simple thermometer if you want an easy way to double-check your tank temperature and avoid relying on a single reading source.
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Reviewed in the United States on April 11, 2026 by Makayla | Tested in Real Life
Size: 1 Pack
No, I was gonna use this to make sure that I can have a good temperature and make sure I’m not killing my fish. Let’s just say this is not the best accurate temperature probe you could use you’ll end up just getting a infrared temperature probe for more money and get accuracy than this one right here I would say other brands is kind of better than this brand for temperature probes and stuff. The accuracy isn’t really that accurate. I mean you’re like my tank is pitch code and it gives me the reading of 81° and it’s not even 81° degrees in my tank mind you definitely not the best accuracy readability is not really the best either you can’t even see it in the dark either when you’re trying to check buttons, there’s no restart button if you get inaccurate and it doesn’t you can’t just press like restart temperature monitoring again like not really the best especially for trying to track another thing. Is that this temperature probe it doesn’t really give the accurate eating either so I mean bye and see how you like it but for me this product is not the best.
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Reviewed in the United States on February 6, 2026 by V