I have a freezer and a refrigerator/freezer downstairs. The fridge/freezer is from the 50's and made by GE. The primary purpose happens to be to store medications for mom and I.
So far, this year the door wasn't closed properly on the 16 cuft freezer.
So as deterrent #1, I bought a $25 freezer alarm, BUT the alarm and LED illuminates for an hour. For now, one sensor is in the freezer and the other in the fridge/freezer. I will time the amount of time in alarm.
The secod deterrent was just installed on the freezer which is the more concerned piece. A child lock: **broken link removed**
The position of the freezer makes it hard to actually determine if the door is closed. I leave opposite the door opening. The latches actually make a click when the door is closed, but if a heavy item fell, it's still possible to wedge the door open a small amount.
I might add a "door prop" alarm and wire it so both units use the same alarm. Some go up to 90 minutes. But they are way to expensive new. AT least two vendors products would work.
So, environmental concerns are real.
Rare water issues. A possible French drain overflow which can be handles with a wet-vac, A window well overflow. It doesn't help when your not home and local alarms in the basement may not be heard. The window well has a local alarm and the french drain has a wireless one with the annunciator in the bedroom. Other water areas could be dreamed up. (washer, water heater, AC drain, sump pump)
Because of a a pilot light stove and an antique stove whose oven has to be lighted manually, a couple of natural gas detectors would help. There is a CO/Nat gas detector in the bedroom, but it would be nice if they were local as well.
Me, I can forget things because of migraines. Usually nothing drastic. I might miss an exit when driving or if distracted, forget what I was going to do. When boiling water for ice tea, I set an alarm. In order to hear my wake-up alarm (which is a Sonalert module), I might not hear it (tinnitus) unless the alarm is facing me.