GM Coolant sensor

[dzorde at aesprodata.com.au]

     Does anyone know if there's a positive curve temp sensor around, ie. 
     increasing voltage for increasing temp.  Would make life a lot easier 
     for analogue circuitry.
     
     Dan        dzorde at aesprodata.com.au


______________________________ Reply Separator _________________________________
Subject: GM Coolant sensor
Author:  diy_efi at coulomb.eng.ohio-state.edu at INTERNET
Date:    9/18/96 10:52 AM


Hi All
     
Here is some more sensor data for you guys. Gm used the same sensor 
as a coolant sensor, a air temp sensor, and a oil temp sensor.
     
GM TEMP SENSOR DATA
     
TEMP(C)   RESISTANCE     VOLTS
     
100       177            1.29
90        241            1.8
80        332            2.24
70        467            2.6
60        667            3.0
50        973            3.6//1.0
45        1188           1.2
40        1459           1.28
35        1802           1.45
30        2238           1.85
25        2796           2.05
20        3520           2.4
15        4450           2.88
10        5670           3.1
5         7280           3.35
0         9420           3.5
-20       28680          4.4
-40       100700         4.9
     
The kink in the curve is because GM uses a 348 ohm 
pullup above 50 degrees. Below it uses a 348 ohm in 
series with a 3.65K resistor as a pullup.
     
A temp range of -40 to 151 degrees gives a range of 0-255H.
     
GL: peter