1. What is the Pt100 RTD Temperature Calculation?

The Pt100 RTD (Resistance Temperature Detector) temperature calculation estimates temperature from resistance values. Pt100 sensors have a resistance of 100 ohms at 0°C and change resistance predictably with temperature, following a linear approximation formula.

2. How Does the Calculator Work?

The calculator uses the Pt100 RTD temperature formula:

Where:

• \( T \) — Temperature in degrees Celsius (°C)
• \( R \) — Measured resistance in ohms (Ω)
• 100 — Base resistance at 0°C (ohms)
• 0.385 — Temperature coefficient (ohms/°C)

Explanation: This formula provides a linear approximation of temperature based on the resistance change of a Pt100 RTD sensor.

3. Importance of Pt100 RTD Temperature Calculation

Details: Accurate temperature measurement using Pt100 RTD sensors is crucial for industrial processes, laboratory applications, and environmental monitoring where precise temperature control is required.

4. Using the Calculator

Tips: Enter the measured resistance value in ohms. The value must be greater than 0 for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a Pt100 RTD sensor?
A: A Pt100 is a type of resistance temperature detector made with platinum that has a resistance of 100 ohms at 0°C.

Q2: How accurate is this linear approximation?
A: The linear approximation is reasonably accurate for many applications, but for precise measurements, the full Callendar-Van Dusen equation should be used.

Q3: What is the temperature range for this formula?
A: This linear approximation works well for temperatures between -200°C to 850°C, though accuracy decreases at temperature extremes.

Q4: Why 0.385 ohms/°C coefficient?
A: This is the standard temperature coefficient for platinum RTD sensors, representing the change in resistance per degree Celsius.

Q5: Can this calculator be used for other RTD types?
A: No, this calculator is specifically designed for Pt100 sensors. Other RTD types (Pt500, Pt1000) have different base resistances.