Which of the following is NOT true about thermistor and resistance temperature detectors?
Which of the following is NOT true about thermistor and resistance temperature detectors? Correct Answer Thermistors can measure temperature over a wider range than RTDs
Comparison between RTD's and thermistor are as follows:
Range:
1) Thermistors can only track a narrow temperature range. They can only measure up to 130°C
2) While some RTDs can exceed 600°C
Sensitivity:
1) Thermistors have a sensitivity of around 10 Ω/°C
2) While RTD sensors change resistance <<0 Ω/°C
3) Therefore Thermistors are faster than RTD's
Accuracy:
1) Thermistors due to their high sensitivity are more accurate.
2) RTD's are comparatively less accurate than Thermistors.
Material:
1) Thermistors are made of semiconductors, ceramic, polymer material, etc.
2) RTD's are made of platinum, nickel, copper, etc.
Important Points
Applications:
1) Thermistors are widely used in home appliances.
2) RTD's are used for industrial purposes.
Cost:
1) Are comparatively inexpensive than RTD's.
2) Thermistors with a wider temperature range are often more costly than RTDs.
3) Temperature changes cause predictable resistance changes in both thermistors and RTDs.