Using automotive thermistors help
Archiver
Posts: 46,084
Hi All,
I'm working on a device to monitor engine function on my friends boat. I
have looked, but I can't find any articles about using engine temperature
sensors, which are usually thermistors. I found Tracy's site about a fancy
way to use them, but all I need is a simple quick and dirty method, as 5
degree resolution is fine for this application. I could also make a custom
sensor out of a LM34, but it would be nice to use the original parts if
possible. Also, has anybody used oil pressure sensors from a vehicle?
Thanks!
Jonathan
www.madlabs.info
I'm working on a device to monitor engine function on my friends boat. I
have looked, but I can't find any articles about using engine temperature
sensors, which are usually thermistors. I found Tracy's site about a fancy
way to use them, but all I need is a simple quick and dirty method, as 5
degree resolution is fine for this application. I could also make a custom
sensor out of a LM34, but it would be nice to use the original parts if
possible. Also, has anybody used oil pressure sensors from a vehicle?
Thanks!
Jonathan
www.madlabs.info
Comments
You can remove the thermister, immerse in lukewarm water and slowly bring the water to boil.....all the while using a thermometer in the water bath and the RCTime command.
Of course you cannot check past boiling, but you can usually get a rough curve of resistance vs temperature in the service manual from the particular engine and come close to the values that you cannot imperically calibrate.
ken
Thanks, I'll give that a shot. I really don't need precision here.
Jonathan
Original Message
From: <smartdim@a...>
To: <basicstamps@yahoogroups.com>
Sent: Wednesday, June 16, 2004 12:12 PM
Subject: Re: [noparse][[/noparse]basicstamps] Using automotive thermistors help
> Since you are looking for ballpark values, and I assume you are probably
mainly interested in the range of normal operating temperatures, my idea is:
>
> You can remove the thermister, immerse in lukewarm water and slowly bring
the water to boil.....all the while using a thermometer in the water bath
and the RCTime command.
>
> Of course you cannot check past boiling, but you can usually get a rough
curve of resistance vs temperature in the service manual from the particular
engine and come close to the values that you cannot imperically calibrate.
>
> ken
>
>
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