RTD Data Acquisition 8-Layer Stackable HAT for Raspberry Pi [Discontinued]The RTD Data Acquisition Card offers a compact and inexpensive solution for reading and storing data from up to 64 RTD 100 temperature sensors with a Raspberry Pi. Using two ADS1248 24 bit delta sigma converters with four channels each, the card achieves better than 0. 1%. Field calibration with a precision 100 resistor can lead to 0. 01% precision. Since temperature measurement using RTD is based on resistance, the resistance in the lead wires and