Re: Did a buy the wrong thermometer to check brew temp like Randy G. does ?

On Wed, 28 Sep 2005 15:38:44 -0500, jim schulman wrote:

> On Wed, 28 Sep 2005 19:11:47 +0200, "Ton" <parrot@xxxxxxxxxxx> wrote:
>
>>Inspired by Randy Glass's website (Chapter 58 Temp surf or time surf +
>>How-to: Brew temp check) I bought a rather cheap digital thermometer of
>>which you can see a picture here:
>>
>>http://img221.imageshack.us/img221/8546/thermometer8tx.jpg.
>>
>>Although there is no brand name on it and only a model no, it looks a lot
>>like a Polder cooking thermometer.
>
> Unfortunately, this one is a waste of money for coffee, since it's
> based on a thermistor sensor, which is too slow to respond. Use it for
> your oven or return it.
>
> You need a thermocouple sensor to measure brew temperature accurately
> enough for it to be useful. Fortunately, courtesy of chinese
> manufacturing, these have come way down in price:
>
> http://store.yahoo.com/techbuys2003/tm-125.html

Unfortunately Jim things like this aren't easy to find in China or at least
I can't find them. I did however find some PID controllers for US$20 from a
retail shop. Haven't had any time to try them out yet though.

Paul
.