Oil Pressure Switch/Sending Unit with only one prong?

[daveismissing]

And you really believe the response is linear?
 

He didn't tell us where it was off did he?



edit: I forgot the high value was defined too, so yes I defer to my elder and superior.
(zap's elder and superior? -rings a bell)


One could test at those resistance values at least.

[Steve Wood]

depends if you believe the factory or not...aftermar ket seems to believe it is linear, but I will leave it to you to argue with them


actually, I have to look to be sure the factory one is linear...I think I plotted it out once, but, that was a long time ago.


I have never seen an electric gauge that was other than kinda close

[Steve Wood]

Pressure Resistance (Nominal) Limits

0 psi (0 Kps)240 Ohm229.0-242.5

Full Rating33.5 Ohm27.0-43.0

[Steve Wood]

Of course, with limits like this, how would one know if it was linear, kinda linear, sorta linear, or sometimes, maybe linear

[Steve Wood]

Oh yeah, just dawned on me that I was thinking of the factory temp sender which is another kettle of fish entirely so I guess I will defer to Zap to answer about the pressure gauge sender having nothing to go on but what SW publishes

[daveismissing]

...I think I plotted it out once, but, that was a long time ago.

I'm impressed,... again.

[Steve Wood]

I have a curious mind, but that was the temp sensor and it works differently from pressure


I have too many cars doing laps in my head

[daveismissing]

Pressure Resistance (Nominal) Limits

0 psi (0 Kps)240 Ohm229.0-242.5

Full Rating33.5 Ohm27.0-43.0

Looks like the mfg greatest concern is that the gauge zeros so they don't get returned as defective upon install.

A series resistor would make it read lower, shunting to make it read higher would be a pita.
 

[Steve Wood]

using a mechanical gauge would be the real solution

[Top Speed]

I prefer mechanical gauges for oil pressure and water temp.