Roman Black wrote:
> > > (light globe) not fast enough to allow a good power control.
> >
> >    I placed it in boiling water - resistance was 155 ohm, pulled
> > it out - resistance dropped to 125 ohm in about 10 seconds.
> > (120 ohm at 25C). At 200-250C this time will be much less,
> > much less then oven's.
>
> Sounds usable. :o) How much quicker is it without
> the glass?? You do know the solder on the globe
> base contacts will melt... ;o)
>
> If you are after a cheap and rugged sensor, what about
> an exposed jug element, about $2 from the supermarket.
> You know the type, ceramic former wrapped in coils
> of wire, two long brass connector rods, no soldered
> connections and enough length of exposed wire to
> give quick response (hopefully)...
> -Roman

   No solder, just small glass tube with two outgoing wires.
I didn't try it without glass, fast enough as it is to me.
Glass tube provides stability. Wolfram spiral is very thin.
I think, in non-mechanical sense it's more rugged then
exposed element.

   Mike.

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu