AcuRite Matte White Digital Wireless Fridge and Freezer Thermometer for Home and Restaurants with Alarm and High/Low Temperature Records (00523M)

I got this to monitor temperatures in the refrigerator and freezer with Homeassistant and it works great; it "just worked" in Homeassistant with rtl_433 (rtl_haos) and showed up as soon as I put the batteries in. The sensors can be picked up pretty far away; I've tested 20m without an issue. It's nice to have a simple alarm/display that sits on the counter. Battery life is unknown at this time, but I'll update when I need to swap them (using lithium AAs in the sensors). Update rate for the temperature is about once a minute, which is great. I'd totally buy this again.

I have boughten 2 off these digital wireless temperature monitors in the last 6 years. They have worked perfectly. They can be recalibrated too be used on two freezers. I can monitor the temperature on all the freezers and fridge in my kitchen.

Something everyone should have. Accurate and excellent functions. It gives max/min temps daily. Should any problem occur with fan or compressors you might not know as shut down could occur at night. By morning after compressor cools it is working again. I should have had one years ago.

Nice product. Elegant style and works seamlessly. Having a serial number on it would make it professional and could be used for places need calibration and testing and tracing back the device, example usage is medication fridge for hospital and nursing homes. I wish the manufacturer would see this and include a serial number on it. Good product good price!!

I've had this in my garage freezer and house fridge for a couple weeks now, and they seem to be reasonably accurate, reading within a degree or two of my mechanical fridge/freezer thermometers. Keep in mind that these are measuring the air temperature, so the readings do fluctuate more than the food temperature. For example the food in my fridge is stable at 35*F, but the thermometer will show about a 10*F fluctuation as the fridge cycles on and off. You will need the lithium batteries for the freezer especially, otherwise you will get a constant low battery alert flashing on the screen since other battery chemistries can't handle the sub 32*F temps. Overall, these seem to be working just fine and I can see that my freezer in the garage is working properly which is my primary concern since I don't get into that freezer more than maybe once a week. The silicone loops make it easy to hang the sensors wherever you want without taking up storage space. I would buy this unit again. The price is reasonable, as is the accuracy for my needs. My only complaint is that it only shows a 24 hour history. It would be nice to have a longer term history, say 30 days or all time min/max, but thats a pretty minor gripe.