A PT500 temperature sensor is a type of resistance temperature detector (RTD).
Here are the key points about PT500 sensors:
- Platinum-based: Made from high-purity platinum, known for its stability and accuracy.
- Resistance value: Has a nominal resistance of 500 ohms at 0°C (32°F).
- Positive temperature coefficient: Resistance increases with temperature.
- Temperature range: Typically used from -200°C to 850°C (-328°F to 1562°F).
- Accuracy: Generally offers high accuracy, often better than ±0.1°C.
- Linearity: Provides a nearly linear relationship between resistance and temperature.
- Stability: Known for long-term stability and repeatability.
- Applications: Often used in HVAC systems, industrial processes, and energy management.
- Standards: Follows international standards for RTDs (e.g., IEC 60751).
- Compared to PT100: Less common than PT100 sensors, but offers higher sensitivity.
- Wiring configurations: Available in 2-wire, 3-wire, and 4-wire configurations.
- Response time: Generally slower than thermocouples but faster than many other RTD types.
- Self-heating: Less prone to self-heating errors due to higher resistance.
PT500 sensors are chosen for applications requiring high accuracy and stability in temperature measurement, particularly in situations where the higher resistance offers advantages in noise reduction or reduced lead wire effects.
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