iBetterLife Refrigerator Thermometer, Digital Freezer Thermometer with 2 Sensors, Wireless Indoor Outdoor Temperature Monitor with Big LCD Display, Min/Max, Audible Alarm for Home Restaurants Fridge

I bought this knowing full well that it wouldn't be up to the task. I knew I'd keep it, find some other use for it, and my search would continue for another solution. The problem: I have a chest freezer in the garage. Sometimes the breaker it's on trips unexpectedly. Could be moisture from an exterior outlet on the same circuit, I need to figure it out. Anyway, I've lost 3 or 4 freezer loads of food over the last few years to this problem. And I'll tell you a secret: opening a chest freezer filled with meat and vegetables that's been sitting, unpowered and sealed, in a garage in the Florida summer heat for two weeks is NOT a good time. It may be the closest I've ever gotten to "screw it, I'm burning down the entire house and starting over." It's getting in my mind nose just thinking about it.Anyway, that's what leads me to this little device. Put a sensor in the chest freezer and get an alarm when it rises above 15F. But the closest place I could put the display is on the refrigerator in the kitchen. So due to my house layout, the path from the display to the sensor is through both stainless steel walls of the refrigerator, through the kitchen wall, through the laundry room, through a cinder block wall separating the laundry room from the garage, and through the walls/lid of the freezer. You can see why I didn't hold out any real hope of it working. Plus, what are the odds that the sensor and its standard rechargable AA NiMH batteries will remain functional in a freezer that routinely sees temperatures down to -5F?Well all I can say is, I'm sorry I doubted you, you amazing little thing. Seriously -- I got everything set up and the sensor info popped up onto the display with no trouble whatsoever. It's now been running steadily for a couple of months on the original set of batteries. I've had the breaker trip twice now (probably due to the unusually heavy rain), and both times I've been able to reset it before anything thawed in the freezer because I had the alarm to alert me.Now, it's not perfect. Build quality is a bit on the "disposable electronics" side of things, it's something that's not built to withstand the test of time. But to be honest, and I can't stress this enough, if it stops me from ever again having to smell 2-week-old raw chicken, beef, carrots, broccoli, etc that's been stewing in a sealed chest with an internal temperature of 90F, I don't care. It lasts as long as it lasts, and then I'll buy another one. It's worth it.

The freezer door was left open like an inch and everyone was wet, but fortunately nothing melted. It's so easy for this to happen i decided to add this unit to keep track of anything going on in the fridge/freezer.It's a little tricky to set it up, but if you read the instructions, it's not too hard. They didn't really offer suggested settings, so i experimented. It shocked me as the freezer alarm went off and when i checked, i think it was in defrost mode, so i set the alarm temp a little higher but still below freezing.Having 2 sensors makes this an even better deal. I've tested it a few times and it amazes me how little the door needs to be open to set the alarms off. If you've ever lost all your frozen food, you know you need one of these. And it's such cheap insurance.

This unit has two sensors and one receiver/display unit. I placed one of the sensors in my freezer in the basement and it worked well for a couple of months. It stopped transmitting and the display on the receiver only displayed dashed lines instead of the temperature. I contacted Amazon, who said to contact the seller, who said to contact Amazon! When I contacted Amazon again, they said it was beyond the return window and they couldn't do anything. I didn't want to return it necessarily, but to replace the failed sensor. I opted to keep it and use the other sensor until it fails - probably in another couple of months! Then I'll try to find something made in the US instead!

I'd been having some difficulties with my refrigerator, with things sometimes thawing in the freezer, and freezing in the refrigerator section, despite monitoring with mechanical thermometers that kept telling me the temperature was correct. So I decided to go digital.The first thing I did with this thermometer was calibrate it against a digital lab thermometer I have that's accurate within 0.05 degree. For $20 I wasn't really expecting great accuracy, so I was pleasantly surprised to find that this thermometer tested out to be about +/- 1 degree F, which at this price point is fairly awesome.Next, I put one sensor in the fridge, and the other in the freezer. The readout unit has some strong magnets which allowed me to attach it to the outside of the fridge. Within minutes I began getting readings from both sensors (as well as from the unit sensor, which give me room temperature).You can set an alarm to go off when any of the sensors reaches a particular high or low temperature. Setting these is very simple, and you can set a range for each of the sensors. So I set my alarms and monitored the fridge for a few days. Every time an alarm went off I tweaked the setting in the fridge and freezer and reset the alarms. After about a week of this I achieved optimum setting for both sections of the fridge.To my surprise, I found I was now setting the control in the refrigerator to somewhat less than I had been. As a result, the refrigerator now runs for less of the day, while maintaining proper temperatures. I've been monitoring for the past month and everything is still right where it should be -- and no more alarms. I figure this little thermometer package is saving me almost 25% of the energy I used to use running the fridge. It's more than paid for itself, and I may buy a few more of these babies to monitor some other items in my home.Recommended.ETA. 03/28/22: Well, I guess you can't have everything. I liked this so well that I bought a second one to use for my brewing refrigerator. The problem is, if you have two of these within 150 feet of each other, then will both key on only ONE of the pairs of sensors. If there was a way to change the channel, it would work, but there isn't. So you can't use them on two refrigerators in near proximity to each other.Pity: if you could select different channels, they'd sell more of them.