
For precision temperature sensing, nothing beats a Platinum RTD. Resistance temperature detectors (RTDs) are temperature sensors that contain a resistor that changes resistance value as its temperature changes, basically a kind of thermistor.
One side of the PT1000 platinum resistor. Adafruit states two wires connect to either side of the platinum resistor.
Other side of the PT1000 platinum resistor. Adafruit states two wires connect to either side of the platinum resistor.
Third RTD wire connected to one end of the PT1000 for 3-wire RTD amplifier lead-resistance compensation. Leave disconnected for 2-wire amplifiers per Adafruit.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| RTD lead A | passive | One side of the PT1000 platinum resistor. Adafruit states two wires connect to either side of the platinum resistor. |
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| RTD lead B | passive | Other side of the PT1000 platinum resistor. Adafruit states two wires connect to either side of the platinum resistor. |
| 3-wire compensation lead | sense | Third RTD wire connected to one end of the PT1000 for 3-wire RTD amplifier lead-resistance compensation. Leave disconnected for 2-wire amplifiers per Adafruit. |