RTD Data Acquisition 8-Layer Stackable Card for Raspberry Pi

• RTD Data Acquisition 8-Layer Stackable Card
• Designed for Raspberry Pi (Not Included)
• Offers 24-bit delta-sigma A/D converters
• Provides eight-layer stackable to 64 RTD channels
• Onboard resettable fuse
• Reverse polarity power supply protection

The RTD Data Acquisition 8-Layer Stackable Card for Raspberry Pi works with PT100 sensors and has programmable LEDs indicating the status of all inputs.

Note: Rev 5. x which was reading also PT1000 sensors is no longer available due to the worldwide shortage of the ADS1248 A/D converter.

Compatible with all Raspberry Pi versions from Zero to 4, the RTD Data Acquisition Card offers a compact and inexpensive solution for reading and storing data from up to 64 RTD-100 temperature sensors. Using 24-bit delta-sigma A/D converters with four channels each, the card achieves better than 0.1% accuracy. Field calibration with a precision 100Ω resistor can lead to 0.01% precision.

Since temperature measurement using RTD is based on resistance, the resistance in the lead wires and connectors must be taken into account when calculating the overall resistance in the system circuit. Using a 3-wire circuit design allows lead wire resistance to be factored out of the overall calculation.