Semiconductor based temperature sensors are pretty much limited to a max of
around 150C.  If you need high temperature measurement there are only two
real methods AFAIK: Platinum resistance, and Thermocouple.  Neither are as
easy to use as e.g. an LM35, but there are lots of application notes on
using Thermocouples if you have a hunt on a search engine such as Google.
Thermocouples can measure many hundreds of degree's C.

Mike

> -----Original Message-----
> From: Chaipi Wijnbergen [SMTP:chaipi.wijnbergen@WEIZMANN.AC.IL]
> Sent: Tuesday, May 15, 2001 3:10 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      [OT]: High temperture sensor
>
> Hi friends,
>
>
> For my next project I need to measure high temperatures.
>
> LM35 goes only up to 150 Degrees Celsius.
>
> I do not know exactly how much temperature range I need, I know that the
> heat source is working in pulses and if it is used too much then hot glue
> and solder near it would melt. I am thinking that if I'll add a
> temperature
> sensor that would start a fan then I would not get to that melting point.
>
> Can anyone point me to a stronger device please.
>
> Thanks Chaipi
>
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