RE: Temp sender curves

[Hirsch <Catenary@xxxxxxxxxxxxxx>]

Graham Hilder wrote:

> Thanks Rich for the info in no.100, the temp vs. res curve for
> the Alfa temp sensor (two examples tested, same results)...
> could you let us know what Alfa models those sensors came
> from, and whether you know if those results are applicable
> to other models too?

Guess I need a little more explanation here.

The sensor I tested was a coolant temperature gauge sending
unit. This sensor is used on 75s (Milanos) and GTV6s. I don't
know what other cars it may fit, but apparently not the
Spider or 164.

The sensor screws into the thermostat housing and has two
spade connectors (outputs). The wider connector goes to the
coolant temp gauge and the narrower connector goes to the
high temp warning light.

The sensor that supplies the gauge has these characteristics:

   Temperature	   Resistance     Temperature    Resistance
   Deg F   Deg C   ohms          Deg F   Deg C   ohms
   -----   -----   ----          -----   -----   ----
   158      70      392          194      90      200
   167      75      314          203      95      173
   176      80      276          212     100      154
   185      85      234          221     105      127

The sensor that supplies the warning light has "infinite"
resistance up to about 105 Deg C and ca. zero resistance
above that temp.

Rich

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