RTD or thermocouple?

[Rudi Machilek]

http://www.omega.com/temperature/Z/zsection.asp

Best source I have found.  The response of a thermocouple is very
predictable.  But I would be very skeptical of any sort of enhancement
device.  The 1000 degree RTD does not have enough safety margin for my
likes.  Use a Type K thermocouple with at least a one eighth sheath,
grounded junction.  Keep the insertion length short, less than 1 cm.
Securely mount the cold side.  Vibration is a killer.  At higher port
velocities, even the 1 cm length may vibrate too much and break off.

Rudi

>
> I'm at the point where I need to get a sensor to measure
> exhaust gas temps,
> and I am seeking some advice.  I can get a thermocouple, but
> I am concerned
> that it will not report temps quickly enough.  I have heard
> that a RTD has
> been used, but I have not found a source for one.  Does
> anyone know of a
> source where I can get an RTD with a "black box" to output
> 0-5v based on
> temps?  Or should I just stick with a thermocouple?


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