Hello, thank you for your help.

In my opinion, I think that this function is just used to correct the value of the conductivity with respect to the temperature. There is nothing to change the calibration of the temperature probe. I think rather than one or more values ​​among the variables GDIFF (30/1.8);  VR0  ; G0 ;  I is not correct. Or there is a mistake in the formula Rpt1000 = (voltage/GDIFF+VR0)/I/G0

Hi

This issue is marked as solved.

Do you solve the problem? How do you solve it?

I just bought this sensor  and I have the same thing: The temperature is 18°C with another temperature controller and according to this sensor, there is 14°C (640 mv)

I don't understand why

Tnak you for your help