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RTD Formula:
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The RTD (Resistance Temperature Detector) formula calculates temperature from electrical resistance for PT100 sensors. It provides a linear approximation of temperature based on the known resistance-temperature relationship of platinum RTDs.
The calculator uses the RTD formula:
Where:
Explanation: This formula provides a linear approximation of temperature based on the resistance of a PT100 sensor, which has a resistance of 100 ohms at 0°C and changes approximately 0.385 ohms per degree Celsius.
Details: Accurate temperature measurement is crucial for industrial processes, environmental monitoring, laboratory experiments, and various control systems where precise temperature readings are required.
Tips: Enter the measured resistance value in ohms. The value must be greater than 0. The calculator will provide the corresponding temperature in degrees Celsius.
Q1: What is a PT100 sensor?
A: A PT100 is a type of resistance temperature detector (RTD) made of platinum that has a resistance of 100 ohms at 0°C.
Q2: How accurate is this formula?
A: This linear formula provides a good approximation for many applications, but for highly precise measurements, more complex equations that account for the non-linear characteristics of platinum may be needed.
Q3: What temperature range is this formula valid for?
A: This linear approximation works well for typical industrial temperature ranges, though accuracy may decrease at extreme temperatures.
Q4: Why 0.385 ohms per degree?
A: This is the approximate temperature coefficient of resistance for platinum RTD sensors, representing how much the resistance changes per degree Celsius.
Q5: Can I use this for other RTD types?
A: This formula is specifically calibrated for PT100 sensors. Other RTD types (PT500, PT1000) would require different constants in the formula.