Remote measurement of fridge and freezer temperatures

This one from Acurite has worked well for us since 2016:

https://www.amazon.com/gp/product/B004QJVU78/

Dutch_12078 wrote:
This one from Acurite has worked well for us since 2016:
https://www.amazon.com/gp/product/B004QJVU78/

That's the same one we have been using. How do you tell when the batteries in the sensor go dead?

Look into the YoLink systems. I don't monitor the temps in our residential fridge (it has digital readouts on it), but I monitor the temp in the basement, have water leak sensors in various places, and a power failure alarm that turns of some smart power strips so unneeded things don't drain the batteries (via the inverter) when just on batteries and solar.

YoLink on Amazon

Rob

If you carry a "Smart" phone, check out the SensorPush (Link). Long range bluetooth connection, logging over day, week, month, etc. I have one in the freezer & one in the refrigerator section. (I also use one for outdoor temperature.)

hedgehopper wrote:
That's the same one we have been using. How do you tell when the batteries in the sensor go dead?

I use the same one. I have Eneloop rechargeable batteries in them and I just replace them with freshly charged ones once a year.

How remote are talking about? Just with the doors closed in the trailer? Or if you gone from the trailer and want to check it?

The problem with battery operated RF remote sensors in the fridge and espically in the freezer is .. The batteries tend to not work. (And the frequency may drift)

Beyond that I can not say much.... Now designing a sensor.. It's easier than you think.. inside that Accurite is a small blob known as a thermisistor.. You need to remove it and "remote" it. (Add leads) then route the wires (There is already a path as there's already a thermisistor inside the fridge and a water line into the freezer) and hook the leads back to the sender OUTSIDE where it's warmer.

Alas.... I can not help you there. You will very likely destroy the thermistor (They are cheap but I know not the value> How cheap. oh 10 bucks for half a dozen give or take)

If they are the right value.... Well 3-D printers tend to eat 'em.

FWIW the ones in my fridge and freezer have been in use several months easy and still going strong. But they are just to use while in the trailer, not with a phone or networked. I love 'em. No idea what brand, prolly just a cheap no-name from China.

fj12ryder wrote:
How remote are talking about? Just with the doors closed in the trailer? Or if you gone from the trailer and want to check it?

I want to read the fridge and freezer temperatures without opening the fridge and freezer doors.

I have used Acurites in all my freezers, both at home and in the RV's, for a number of years. Never had a problem with them not working. I do, however, change out the batteries every year.