Platinum RTD Sensor - PT100 - 3 Wire 1 meter long
PT100 platinum RTD probe on a 1 m three-wire cable, 100 Ω at 0°C. Requires a dedicated amplifier (e.g. MAX31865) to convert resistance to temperature; not directly readable by a standard ADC.
PT100 platinum RTD probe on a 1 m three-wire cable, 100 Ω at 0°C. Requires a dedicated amplifier (e.g. MAX31865) to convert resistance to temperature; not directly readable by a standard ADC.
One side of the PT100 platinum resistor element. Adafruit states two wires connect to either side of the platinum resistor.
Opposite side of the PT100 platinum resistor element. The sensor is a 100 ohm platinum RTD at 0°C.
Third wire connected to one end of the PT100 element for 3-wire RTD measurement so an amplifier can subtract lead voltage drop. Leave disconnected for 2-wire amplifiers.
| Pin | Type | Function |
|---|---|---|
| RTD lead A | Unknown | One side of the PT100 platinum resistor element. Adafruit states two wires connect to either side of the platinum resistor. |
| RTD lead B | Unknown | Opposite side of the PT100 platinum resistor element. The sensor is a 100 ohm platinum RTD at 0°C. |
| RTD sense lead | Unknown | Third wire connected to one end of the PT100 element for 3-wire RTD measurement so an amplifier can subtract lead voltage drop. Leave disconnected for 2-wire amplifiers. |
One side of the PT100 platinum resistor element. Adafruit states two wires connect to either side of the platinum resistor.
Opposite side of the PT100 platinum resistor element. The sensor is a 100 ohm platinum RTD at 0°C.
Third wire connected to one end of the PT100 element for 3-wire RTD measurement so an amplifier can subtract lead voltage drop. Leave disconnected for 2-wire amplifiers.
I2C · SPI · Single data line · 3.3 – 5 V · Breakout
Verify supply voltage and logic levels before powering up.
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