# Platinum RTD Sensor - PT100

**Type:** Product page · **SKU:** SPX-17059 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/platinum-rtd-sensor-pt100.html ([markdown](https://core-electronics.com.au/platinum-rtd-sensor-pt100.html.md))

It is suitable for applications in the temperature range of -200°C to 600°C but are more commonly used in the range -50°C to +250°C...

## Pricing

- **Price:** $36.95 (inc GST) — $33.59 AUD, exc GST
- **Quantity discounts:** 5+ $32.58 (exc GST) · 25+ $31.91 (exc GST) · 100+ $30.56 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 3 more in 5–11 days.

## Description

A PT100 is a Platinum RTD (Resistance Temperature Detector) with a resistance of 100O at 0°C which changes with temperature. It is suitable for applications in the temperature range of -200°C to 600°C but are more commonly used in the range -50°C to +250°C.

To use this sensor with our [Qwiic PT100 ADC](https://core-electronics.com.au/search/?q=16770) please connect the red wires to terminals 3 & 4. Connect the white wire to terminal 2. Short the *A* and *B* pads on the [back of the Qwiic PT100 PCB](https://core-electronics.com.au/attachments/localcontent/16770-Qwiic_Instrument_ADC_-_PT100-03_19950d9f876.jpg). Be sure to use [Example4-3-Wire](https://github.com/sparkfun/SparkFun_ADS122C04_ADC_Arduino_Library/blob/master/examples/Qwiic_PT100_ADS122C04/Example4_3-Wire/Example4_3-Wire.ino) from within the ADS122C04 library.

How do PT100 sensors work? On four-wire sensors the red wires are connected to one end of the resistor; the white wires are connected to the other end. For three-wire, they use the same scheme: the two reds to one end; and one white to the other. Using a DMM you should see ~1 Ohm between the red wires; and ~100 Ohms between red and white.

- 100Ω nominal resistance at 0°C
- 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
 
- [Datasheet](https://core-electronics.com.au/attachments/localcontent/PT100_DATA_SHEET_52090d290c9.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_914.jpg)