Indoor, outdoor, fridge thermometer

I just purchased This thermometer to monitor my fridge, freezer, living space and outside temp. It works really well.

Hope this helps.
Bill

http://m.ebay.com/itm/RF-Digital-Wireless-Weather-Station-Thermometer-Hygrometer-Barometer-2-Sensors-/172028216388?nav=SEARCH
I bought one of these dykie thermometers from ebay. One remote sensor outside, one in the fridge, and the display mounted on side of cabinet with velcro tape. Works great. Available at amazon.com also

I use this with 3 additional sensors. Ambient Weather WS-10 Wireless Indoor/Outdoor 8-Channel Thermo-Hygrometer with Three Remote Sensors
I monitor Outside, Fridge, Freezer, Belly/Tank Space (Temp only with wired probe), Electronics bay, & Living space.

Two location thingies are really cheap. I picked up a lovely one recently for $5. Three location ones I can't say I've ever seen, but I have no doubt they exist. It's your money, best of luck.

I bought a couple of Oregon Scientifics a few years ago. They were on a Walmart clearance shelf for some very cheap price like $3 or $4 so figured couldn't hurt too much to try them. They work really well. Batteries last about 7 or 8 months.

Displays the main unit environment and up to 3 external sensors if available.

Each one only came with one sensor, so currently have one unit in the house and sensor channel 2 out on the deck. 2nd unit is in the TC with sensor channel 3 in the TC refrigerator.
When at home, both master units display both sensor channels with a distance of about 100' between the sensors and the master unit.

No need to open the door or run wires to monitor the temp or humidity.

I plan on purchasing a couple more sensors but haven't made a concerted effort yet.