Albert wrote:

I need a bi-metallic switch, automatically resettable that closes
around 15F. A small inexpensive type, similar to the kind put inside
nicad battery packs to limit the dissipation of the batteries would be
ideal.

What I'm finding when I google is very large and expensive temperature
controllers that operate from 60F and up.

Anyone know of vendors selling these types of products???

Yup - ppl like Microtherm IIRC

I've never seen a low temp version though. Usually ppl are worried about *overheating*.



What I want is a simple alarm to warn me when my freezer gets too warm
to keep the contents frozen.

Are you using active electronics ? Considered monitoring the Vbe of a transistor
junction ? That works well. Not as simple as a switch though.


Graham