Temperature Sensor Comparison: RTD vs Thermocouple vs Thermistor
อุณหภูมิเซ็นเซอร์RTDThermocouple
# Temperature Sensor Comparison
Choosing the right temperature sensor significantly affects measurement accuracy. Let's compare.
## RTD (Resistance Temperature Detector)
| Property | Value |
|----------|-------|
| Range | -200°C to +850°C |
| Accuracy | ±0.01°C to ±0.1°C |
| Stability | Excellent |
| Cost | High |
**Pros:** High accuracy, stable, repeatable
**Cons:** Slow response, limited range, requires excitation current
## Thermocouple
| Property | Value |
|----------|-------|
| Range | -270°C to +2300°C (type dependent) |
| Accuracy | ±0.5°C to ±2°C |
| Stability | Moderate |
| Cost | Low |
**Pros:** Wide range, inexpensive, fast response, rugged
**Cons:** Lower accuracy than RTD, cold junction compensation needed
## Thermistor
| Property | Value |
|----------|-------|
| Range | -80°C to +300°C |
| Accuracy | ±0.01°C to ±0.2°C |
| Sensitivity | Very high |
| Cost | Low to moderate |
**Pros:** Very high sensitivity, affordable
**Cons:** Narrow range, non-linear
