Wired Type PT100

The PT100 (Platinum Resistance Thermometer) is one of the most preferred sensors for industrial temperature measurement. It is known for its resistance value of 100 Ω at 0°C .

Key Technical Specifications

• Working Principle: As temperature increases, the electrical resistance of platinum also increases ( Positive Temperature Coefficient - PTC ).
• Temperature Range: Generally between -200°C and +850°C.
• Sensitivity: The temperature coefficient (α) for a standard PT100 is approximately 0.003851 Ω/Ω/∘C. This means that for every 1°C increase, the resistance increases by approximately 0.385 Ω .
• Sensitivity Classes (DIN EN 60751):
• Class AA: ±(0.1+0.0017⋅ ∣ t ∣ )∘C
• Class A: ±(0.15+0.002⋅ ∣ t ∣ )∘C
• Class B: ±(0.3+0.005⋅ ∣ t ∣ )∘C (The most common standard class)

Connection Types

In PT100 measurements, different connection methods are used to ensure that cable resistance does not confuse the measurement result:

• 2-Wire: This is the simplest but least accurate method. Cable resistance is added directly to the measurement, increasing the margin of error.
• 3-wire: This is the most commonly used method in industry. The third wire compensates (balances) the cable's resistance.
• 4-Wire: Provides the highest accuracy at laboratory level. Completely eliminates errors caused by cable resistance.

Areas of Application

Thanks to its high stability and repeatability, it is reliably used in monitoring fluids in pipelines, temperature control in silos, and in sensitive machine components.

Do you need a specific technical drawing or visual configuration detail for mounting this sensor in a process or pipeline?

The Difference Between PT100 and Thermocouple

Pt100 electrodes respond more slowly and are more expensive than thermocouples, but they produce much more reliable results at low and medium temperatures. They also do not require "cold spot compensation" (CJR) like thermocouples.

Are you planning to connect the Pt100 to a specific control device (such as a PLC or transmitter), or do you need visual details for a technical drawing?