Most fridges have a dial that goes from 1 to 5, or “colder” to “coldest,” with no actual number attached. You’re trusting a guess. The only way to know your fridge and freezer are holding the temperatures they need to be at is to measure them directly, and that’s what a dedicated fridge thermometer does.

The AcuRite Wireless Fridge and Freezer Thermometer with Alarm handles this with two separate wireless sensors, one for the fridge and one for the freezer, both reporting back to a single display. A few things stand out from the spec sheet:

  • Temperature accuracy rated to within about 2 degrees Fahrenheit, with readings updating every 60 seconds
  • A display that sits on the counter, mounts to the fridge door with built-in magnets, or hangs on a wall via a keyhole slot
  • Programmable high and low alarms for each compartment, so you’re alerted if a door gets left open or a seal starts failing
  • A 24-hour high/low temperature log for each sensor, useful for spotting whether a problem is one-off or ongoing

Each sensor has a silicone strap for looping around a wire shelf, or you can use the included suction cups to stick it to an interior wall. Sensors run on AA batteries, and so does the display unit, so there’s no wiring involved anywhere.

If you store insulin, breast milk, or anything else where “probably fine” isn’t good enough, this is worth a look on Amazon. It answers the question with a number instead of a guess.