On 03/26/2011 05:02 AM, Karl Townsend wrote:
manual
http://cgproducts.johnsoncontrols.co...PDF/125188.PDF

P.S. page 10 shows resistance vs. temp of sensor

"PTC" generally means thermistor. Different thermistor materials have
slightly different curves, and of course moving the curve up and down is
just a matter of changing the thermistor area.

For the little ones that I've used there is no standard. There may be
an industrial standard for things like this, though.

This pretty much leaves you with having to shop around, and seeing if
you can find a sensor that looks like it has the same curve.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html