SparkFun
PT100 Platinum RTD Temperature Sensor
· MPN: SEN-17059
This PT100 is a platinum RTD (Resistance Temperature Detector) for accurate temperature sensing. It has a nominal resistance of 100Ω at 0°C, with resistance ...
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This PT100 is a platinum RTD (Resistance Temperature Detector) for accurate temperature sensing. It has a nominal resistance of 100Ω at 0°C, with resistance changing as temperature changes.
It is suitable for applications across a broad temperature range, and is commonly used where stable, repeatable temperature measurement is needed. The sensor uses a three-wire connection scheme, with the two red wires connected to one end of the resistor and the white wire connected to the other.
For use with the SparkFun Qwiic PT100 ADC, connect the red wires to terminals 3 and 4, connect the white wire to terminal 2, and short the A and B pads on the back of the Qwiic PT100 PCB. Use Example4-3-Wire from within the ADS122C04 library.
When checking the wiring with a DMM, you should see approximately 1Ω between the red wires and approximately 100Ω between a red wire and the white wire.
Specifications:
- Nominal resistance at 0°C: 100Ω
- Temperature Coefficient (0°C up to 100°C): 3.85 - 10-3 K-1
- Tolerance classes to DIN EN 60751: A, B
- Operating Temperature Range: -50°C up to 550°C
- Measurement Current (DC) at 25°C: 1mA
- Maximal Permissible Peak Current (DC) at 25°C: 3mA
- Insulation Resistance: > 10MΩ
- Self-heating at 0°C: < 0.5 K / mW
A useful sensor for temperature logging, process monitoring, lab projects, and Qwiic PT100 ADC builds.
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- ADS122C04
- The ADS122C04 is a Texas Instruments analogue-to-digital converter (ADC) chip that measures small analogue voltages and reports them digitally over I2C. When a board is built around it, the exact part sets the resolution, input options, conversion speed and software support you can expect.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- DIN
- As a pin label, DIN stands for 'data in', the input through which a device receives serial data from a controller, as found on SPI displays, LED drivers and other serial modules. DIN can also refer to the German standards body of that name, as in a round multi-pin DIN connector or DIN-rail mounting.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- RTD
- An RTD, or resistance temperature detector, is a temperature sensor whose resistance changes in a predictable way as it heats or cools, giving accurate and stable readings (PT100 and PT1000 are common types). When a product lists an RTD it indicates precise temperature sensing, which also helps applications such as conductivity probes correct their readings for temperature.
- Tolerance
- Tolerance tells you how far the real resistance value may be from the printed value. A 1% resistor is useful when a circuit needs more predictable behaviour than a looser 5% or 10% part.
Find this product in
PT100 Sensor Datasheet
Datasheet · 508.7 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 399.7 KB · Click any page to view full size
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