[Diy_efi] Temperature/Pressure sensors

[Carter Shore]

Check out National Semiconductor,
LM335 yields 10mV/degree K.
Cheap, tiny, easy to interface.

Carter

--- Alex Garbino <agarbino at gmail.com> wrote:

> Hello,
> 
> I'm trying to build a data acquisition system to
> monitor various
> temperatures and pressures. I've been looking at
> thermocouples, RTDs, and
> thermistors; but they have widely different
> advatnages and disadvantages. I
> was thinking of using thermistors to monitor air
> intake temperature &
> pressure (on a turbocharged car, so I would like to
> monitor atmospheric,
> pre-intercooler, and post-intercooler/manifold) as
> well as coolant temp, oil
> pressure & temp, and EGTs, both before and after the
> turbocharger.
> Thermistors seem the best choice for air intake,
> since they have a fast
> response and are cheap; however, I cannot find good
> datasheets regarding the
> linearization coefficients.
> 
> Does anyone have advice on a good way to capture
> data, as well as any tips
> on the best way to mount these sensors (a modular
> system would be best, so I
> could move sensors to different positions and switch
> them in and out with
> minimum hassle)? Also, can anyone recommend a good
> source of cheap sensors?
> 
> The signals will be captured via a PIC18F series'
> A/D converters/digital
> inputs, and relayed immediately onto an on-board
> computer. Please let me
> know of any resources that would be helpful!
> 
> Regards,
> Alex
> 
> For a more detailed discussion on what I'm trying to
> achieve, please see
> http://www.mkiiitech.com/forums/viewtopic.php?t=903
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