SCUD
Advanced Member
The wireless "AcuRite 00986A2 Digital Refrigerator/Freezer Thermometer" allows me to know temperatures without opening the fridge door. It transmits far enough that the monitor panel can be carried in the truck cab, and has an audible alarm that can be set. Usually around $30, and the batteries last a long time. We have used one in our home refrigerator as well.