SparkFun PT100 Sensor is a Platinum Resistance Temperature Detector (RTD) with a resistance of 100Ω at 0°C which changes with temperature. The sensor is suitable for applications in the temperature range of -200°C to 600°C. It’s more commonly used in the range -50°C to +250°C. Use this sensor with the Qwiic PT100 ADC by connecting the red wires to terminals 3 & 4. Connect the white wire to terminal 2. Short the A and B pads on the back of the Qwiic PT100 PCB. Be sure to use Example4-3-Wire from within the ADS122C04 library.