Wireless 2-sensor fridge thermometer?

Gdetrailor,

My experience is that Alkaline batteries perform rather better than Li at low temperatures. It is anecdotal evidence.

Any remote sensor which uses a battery, wireless AND is in a COLD place can be problematic.

Standard "dry cells" hate low temperatures and with temps of 45F or less they will live very short lives.

Found that out with a Digital T-stat for my garage furnace. Only heat the garage when I am planning to work in it, gets below 32F often during the winter.. More than once had to replace the batteries in that T-stat within a month during the winter before I got smart and ditched the batteries for a separate power supply..

You could try Lithium non rechargeable batteries for low temp use, may work better..

Also have a wireless remote "weather station" with wind speed, direction outdoor humidity.. Yeah, batteries often fail faster during extreme low winter time temps and changing the batteries requires standing on your head to resync the remote to inside unit.. Not to mention, the wireless portion is flaky at best, typically loses connection when there is a weather event and if lost too long a resync is in order again..

For fridge/freezer applications, I prefer the wired route, much more reliable, cheap and effective and keeps the battery outside of the cold of the fridge.. Very easy to slip the wire between the door gasket..

Keep in mind, you will be reading the AIR temps inside the fridge, may not reflect the actual overall FOOD temps as they slowly vary in temps compared to the change in air temps.

I have been using the AcuRite from Amazon for 7-8 years and it's been great

This one might be $10 more than the knock-offs but we have had it for 7 years and it still works.
thermometer

We have this one for our trailer:
AcuRite Digital Wireless Fridge and Freezer Thermometer with Alarm and Max/Min Temperature for Home and Restaurants (00986M), 0.6, White
Available on Amazon
We have had good success with it.

Go to Ambient Weather site. Great selection of remote units. We have a unit with 5 remote sensors, freezer, fridge, outside, storage compartment and interior. Uses AAA batteries, ours is 7 years old, no issues.

Jim

I have tried a number of different wireless 2 channel (fridge body & freezer) thermometers, and after having most of them fail, often still giving the last reading on the display when the sensor died, I switched to a pair of Sensor Push devices. No display - reads on your phone. Provides instant / hour / day / week / month graphs of temperature & humidity. Expensive, but they work. I now have 4 sensors, 2 for the refrigerator, one for outside temperature & one I keep in my medicine storage box.