AcuRite Digital Wireless Fridge and Freezer Thermometer with Alarm, Max/Min Temperature for Home and Restaurants (00515M) 4.25" x 3.75"

tl;dr version: This works fantastic for monitoring a standalone freezer in the basement. Full story: We have a standup refrigerator-sized freezer in our basement (mainly because that was the only place in the house we had room for it). We've managed to leave the door cracked open a total of 3 times now in about 10 years, due to simple negligence, and have lost hundreds of dollars in spoiled frozen foods as a result. There's no reason this needs to ever happen, so after the last time a month or so ago, one part of my fix was that I wanted something to sound an alarm if the temperature rises too much. Enter this simple wireless temperature sensor. Since the use case here is for a single-chamber freezer, and our fridge is well out of range 1 1/2 floors above on the other side of the house, I opted to just put both sensors inside the freezer. One is on the top shelf of the door, theoretically the highest temperature inside the freezer and the first location to start thawing if the door were left open. The other is buried deep on the bottom shelf near the back, which is theoretically the coldest area of the freezer. This way I get an idea of the effective range of temperatures throughout the freezer at any point in time. In case anyone's curious, there seems to be a fairly consistent 15F degree difference between the two sensor locations, plus or minus a few degrees. Installing the batteries and connecting the sensors to the display unit was quick and effortless. I didn't have any lithium batteries on hand, so despite the freezer being below the optimal range for alkalines, I went with what I had and gave it a shot, knowing I could just go pick up some lithiums the next day if it didn't work. So far the sensors haven't had any battery issues despite the subzero temperatures. Placing the sensors inside the freezer was also easy, although I couldn't make use of either the suction cups due to the low temperature or the wire shelf straps due to the shelves being thoroughly encased in frost and ice. That said, having them just sit on the shelves seems to work fine. The display unit is magnetically stuck to the front of the door and has had zero issue so far with the signal from the sensors punching through the metal frame. Both sensors show a very strong signal indicator. I have not had an opportunity yet to test the alarm feature. I did reprogram the "refrigerator" sensor's alarm range to freezer settings and turned on the alarm for both. As pointed out in the manual, while one sensor is labeled as fridge and one as freezer, they're otherwise identical and you can adjust the alarm range for each one independently. You're also not limited to just cold temperatures - the nominal max is 158F/70C although the display only goes up to 99.9 in Fahrenheit mode - so you could easily monitor something other than a fridge and/or freezer with this if you wanted to. Anyway, one of these days I should probably take one sensor out of the freezer for a while and let it warm up just to confirm that the alarm is audible from another room. Overall, I'm very happy with this purchase, especially considering the reasonable price.

it works excellently the wireless connectivity is easier for me and it helps me keep an eye on the temperature in the fridge and freezer and installing this is easy peasy and its easy to read in a illuminated room

I bought this product to keep track of freezer and refrigerator temperatures because the external display on my new fridge shows what the temps are set to but does not show if the temperatures are fluctuating to the extent I should be concerned that the fridge is not holding the correct temp. Easy set up and links up with sensor units quickly. I would follow the instructions to use a lithium battery in the freezer as other batteries may not hold up to freezing temperatures. The remote display unit has good sized numerals for viewing. At first I had both sensor units in separate freezers about 20 ft apart and they worked well. The second freezer had an external temperature indicator so I put that sensor in the refrigerator. The remote sensor units have suction cups provided and work OK. I found that there are not many good places to 'hang' the unit in my fridge. Presently that unit is hanging on the left side of my fridge but under the ice maker. Good units and will update this post later after I have had for 6 months.

We have three chest freezers, two of which are out of sight in the basement and full of veggies from the garden, venison from the property and meat from our nephew's farm. The concern has been losing either one, or both if the GFCI trips, and their contents. One freezer is about a year old and the other just a couple months. I saw this system recommended on a FB group and the Amazon reviews seem favorable. So I decided to give it a try, especially since it has a WiFi connection, so the information display can be in the house, and an alarm. We can check the freezers' status at any time and the alarm will warn if we have a pending disaster. It arrived well-packaged. The box exterior is plain cardboard with a plain label just at one end. No fancy marketing! I ordered four AA Lithium batteries at the same time for the sender units, which are recommended by the manufacturer for use in freezers. After installing standard 'Copper Top' batteries in the display first, then the lithiums in the sender units, the temperatures of each sender unit appeared on the display immediately. They were the same at about 72F. To me, the instructions were clear, though it probably does help to be mechanically-inclined! I set the alarms for min and max temps and took the sender units down to the freezers. I hung them on the baskets with tie wraps as the included suction cups wouldn't have stuck on the dimpled freezer walls. The Amazon photo showing the silicone loop wrapped around itself is not very practical as the loop is small compared with the size of the sender unit and you'd have to really stretch it. Too much effort in the depths of a full freezer! When I returned to the main floor, the alarm was sounding. The displayed temperatures were slowly going down as the sender units adjusted to the freezer internal temperatures, but were higher than my max temperature settings. I pressed the "Bell" button to put the alarm to sleep. The display seems to update every few seconds, not instantaneously. After a few minutes, the displayed temps reached the freezer internal temperatures, which were just below 0 deg F. Each reading was slightly different due to being in different freezers of different makes and settings and the temps vary anyway within a few degrees as the freezer compressor cycles. 0 deg F is what is expected though for a chest freezer. I have my alarm settings at -20F and 15F for both freezers. The alarm won't go off for a few minutes if it reaches those temps. This avoids alarms when the freezer lid is opened to put in or take out food. The signal display was indicating max. strength with the display unit maybe 20 ft (straight line) away from the freezers on the floor above. Moving at least double that into the kitchen, where the signal has to pass through a thick natural stone wall in the basement, as well as the floor structure and around various steel/wood heating ducts in the floor, the strength was still high. I was impressed, considering the sender units are also inside a cold, metal box! The two small magnets on the back upper corners of the display unit, aren't quite strong enough to hold it firmly onto the refrigerator door. It slides down as the door is shut and there's a risk of it falling off and being damaged. I have it sitting on the dining room dresser, where it's out of the way, but visible. It could also be hung on a nail on the wall. While a little pricey compared with other similar units (with more 1 Star reviews!), $35 is a small price to pay to avoid spoiling all the valuable food that is in the freezers! So far the system is performing well and to design. I will update should anything go wrong! UPDATE: Several months in and the system is working just fine. After the first week or so, I noticed one of my freezers was 10 degrees or more colder than the other and unnecessarily so. I adjusted it and now I have comparable temps, though the later-purchased freezer has a wider range of temperature fluctuation , due to a less precise control system. Very pleased!

Usually I find some little annoyance with consumer-grade devices but system has given me no problems and all the promised features I use have worked flawlessly. I only noticed one time when I first set it up that it lost signal with one of the sensors but it automatically reconnected after about 30 seconds with no manual intervention (like reset or reboot). No other issues noticed in the rest of the six months I had it installed. The min/max function is great because you can see if there were any problems between when you looked at it last. This is also very helpful if you have a new refrigerator and you are trying to get the settings perfect. I would also think it would be useful for a fridge with electronics to make sure they giving accurate readings. Note that used lithium batteries instead of the included alkaline as, according to the instructions, they perform better in low temperatures. I cannot comment on the alarm feature as I have it disabled. The magnet on the display is decently strong and it hasn’t moved around at all even with repeated door open and closing. The controller color is grey/silver and looks great on my stainless fridge. Probably would look good on most other colors too. The current temperature readings are large enough to be seen from about 10 feet with decent vision and lighting but the display itself is not lighted (which makes sense as it runs on batteries). Highly recommended!

This review is for AcuRite Digital Wireless Fridge and Freezer Thermometer with Alarm. We have a freezer in a non-insulated detached garage. During 100-degree summer temperatures the compressor was overheating and we were getting less than desirable temperatures. If detected early, this is an easily remediable condition with additional ventilation. This gizmo worked for us with the following workarounds: 1- It takes 24-48 hours to adjust and work. The three units, take a while to communicate with each other. 2- The manufacturer recommends using Lithium battery. We did not, at first. This caused issues with the thermometer sensor. It worked great after using lithium battery in one of the thermometer sensors (the other one worked fine with regular battery). 3- Once we used a lithium battery in the sensor, the reception area decreased. We had to move the display unit and place it within 25 feet from the freezer sensor. 4- The alarm will sound even when the temperature goes below zero. The manufacturer setting was somewhere between 0 to -5, we had to adjust our lower parameter to -20. 5- At times the temperature read on this unit will fluctuate 5-8 degrees from the actual temperature. This happens mostly when the temperature is dropping or rising. Commercial freezer alarms that have 100% accurate temperatures cost thousands. We adjusted our expectations. The unit works and is still viable even with this defect. This unit has been a blessing. We can now sleep through the night and monitor the freezer temperature from the comfort of our home. it has saved us a bunch. We placed the other sensor in our home freezer, it alerts us when the door is not completely closed. We have been using this unit Since August 2022 and it is still working well for us.

May 2023 I purchased two of these and have been extremely placed. This is July 2026 and they work flawlessly. I have used only lithium batteries and have only replaced the batteries in one recently. I am able to remotely monitor my RV freezer and refrigerator temperatures via a Geeni camera. I also monitor my freezer out of the refrigerator temperatures and my home when I am away. I hope this review helps someone and possibly gives them a good idea. It is given me much piece of mind.

I purchased this to monitor the temperatures in my Frigidaire refrigerator as I had an episode where items in the refrigerator (i.e. cans of water and a steak) were frozen and items in the freezer (i.e. fudge pops) were partially thawed and I was concerned my refrigerator was malfunctioning. The installation was straight forward with the unit coming to life immediately after installing the batteries in the 2 sensors and the base unit. Each sensor requires two AA batteries and the base unit unit requires three AA batteries. A total of 7 AA batteries are required. I installed Lithium batteries in the sensors as they have a broader operating temp range than alkaline batteries (i.e. good down to -63F). The base unit provides min and max temps in a 24 hour period which is quite informative. The base unit has magnets if you want to attach it to the exterior of the fridge or a pop up stand if you want to place it on top of your fridge, or it can be mounted on a wall. Very convenient. The only down side is that the suction cups for the sensors don't work. The suction cups popped off the wall of the refrigerator and freezer so I just have the sensors laying flat on the shelf. The unit is well worth the money I paid for it and I highly recommend it. In my case I set the temperature setting for the refrigerator to a higher setting and made sure the fr4eezer door was not left inadvertently open with temperatures confirmed by the Acu-Rite monitor as -1 F for the freezer and +37 F for the refrigerator. Perfect.

I can't attest to the specific accuracy, that it's within x degrees and so on, but what I can attest to is that it's very easy to read and it's more than accurate enough for my uses. I also love that it shows the high and low over the last 24 hours. The reason I got them is that my fridge one day lost it's temperature and some food spoiled but not enough to be obvious. We almost got sick but luckily caught it on time. As a result we bought this to monitor the temperature and it's been a great piece of mind to be able to just look at them at random times and know that the last 24 hours the fridge has always been within a certain acceptable range. They have been running on batteries for months and they are doing great. That being said I would recommend using two thermometers (why I bought this item because it comes with two) so that they can be located in different parts of the fridge. Not only does it give you more confidence that they are working and accurate at first, but later on you can locate them in different areas such as the door which has a tendency to have a lower temperature if it's been left open and so on.

good product, very happy with the purchase

... the frustration of a fridge/freezer in the garage stopping working and not noticing until a few days later, I know the pain involved in having to throw out perfectly good (and expensive) food. So, I resolved to stop it happening again and I purchased these. Reviews that are written after time and not when in the initial haze of consumer contentment always carry far more weight, in my opinion, and this is one such as I have had these since November 2022. I am writing this now because, thanks to these beauties, I managed to head off another fodder fiasco when a different fridge/freezer in the garage suddenly stopped: I fixed the problem before I had to throw anything away because I became aware of the issue in good time. At last - something I bought that actually SAVED me money !! These are fairly straightforward to set up (although to set the warning alarms takes a little effort) and I am pleased to report that the batteries (two AAs in each) I installed in both sensors over a year ago - ALWAYS use lithium ones if you want a better experience ! - are still functioning just fine (although I have changed the three AAs in the receiver unit on one occasion). I decided not to keep the alarms as I didn't want any potential beeping in the middle of the night, so I simply verify the temperatures every day. It's actually quite fun to think that you are checking on the temperature of an appliance outside of the house ! There is an easy-to-see record of the previous 24-hour's minimum and maximum temperatures at the bottom of the screen and one push of a button shows you all the lowest and highest temperatures from when you last reset the unit. All numbers are clear to read. I do think that this set is quite expensive, though (and it was £60 when I purchased it), but one's choices are somewhat limited and at least I can show that they do work, so I guess it equates to value for money - especially when one compares it with a cost of replacing the contents of a well-stocked fridge/freezer !! I have the receiver unit on the side of a fridge in the kitchen (decent magnets present) and the actual sensors are about 20 feet away in the garden behind a metal garage door; I have had no issue with signal strength. And that's about it. As is my wont, I shall update this review if anything ceases to function as it should. If there is something specific that you would like to know that I have missed out, please ask a question and I shall do my best to respond... FV

Las lecturas son confiables, los compré para tener más control de los alimentos que almacenamos en el refrigerador, apesar de que nuestro refrigerador tiene un display digital para ajustar la temperatura, no confiaba en la precisión y quise tener un segundo monitor con estos sensores y las lecturas son muy parecidas aproximadamente +-2 grados. La opción de sujeción no es muy buena ya que se caían constantemente, opte por simplemente dejarlo en la charola del refrigerador sin tenerlo colgado en algún lugar en específico. Muy recomendados

Easy to set up with great instructions. Accurate and easy to use. Would be better if it had a backlight but not a deal breaker. Great to glance at and see what my fridge/freezer temp is in the back of my canopy.