"notbob" > wrote in message
...
> On 2014-11-20, gregz > wrote:
>
>> Use some duct tape so it does not sink.
>
> I looked at one in WW. They appear to have a little plastic gasket in
> the lid, which I assume holds the probe shaft in place. Yes? No?
>
> nb

Yes, it can't fall through.

Cheri