How to read temperatures using PT1000 with ADCPi ?
5778 Views - Created 05/10/2015
For this sensor, the Delta-Sigma Pi may be a better option as it does not include a voltage divider so you can create your own with lower-value resistors which will give you a bigger voltage swing and therefore better accuracy. The Delta-Sigma Pi has a maximum voltage of 2.048V so can use the 5V rail to power the sensor as long as you pick a suitable divider resistor to bring the maximum voltage down below 2.048V. We have a voltage divider calculator which will help you with picking a suitable resistor. Using the Delta-Sigma Pi will also have the advantage that you can put the sensor on the ground side of the voltage divider which will mean the voltage will increase with the temperature making measurements simpler.
My software can handle both VCC and ground side by way of configuration, so no problem there either. And I only need accuracy to 0.5C. I'll order one soon !
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