Pt100 thermocouples are a misnomer of two separate types of temperature sensor, a Pt100 resistance thermometer and a thermocouple. Pt100s and thermocouples are two very different technologies both used to measure temperature. A temperature sensor can be one or the other, a sensor cannot be both. It can often be hard to tell if you have a Pt100 or a Thermocouple in front of you if you are not a specialist. Instrumentation can often confused things further. If an instrument accepts both Pt100 and thermocouple input it might be confusingly labelled as Pt100 / Thermocouple.
Some general rules might help you decide if you have a Pt100 or a thermocouple in front of you:
|Thermocouples||Pt100 Resistance Thermometers|
|Are generally 2 wires (4 or 6 if multiple sensors are together in one sheath)||Are generally 2,3 or 4 wires.|
|Cable colours follow thermocouple colour code pattens for IEC, British or other international standards.||Cable colours are generally red and white.|
|Thermocouples can be used at higher temperatures (up to 1600°C).||Pt100s are used at lower temperatures (below 500°C).|
We are temperature sensor experts and figure out exactly what type of temperature sensor you require. Just get in touch.