What is a typical operating range for a PT100 RTD?
A. -200 to 850°C
B. 0 to 100°C
C. 0 to 300°C
D. 100 to 500°C
View Answer
Answer: A
Explanation:
A standard Pt100 RTD can typically measure temperatures over a wide range of approximately -200°C to +850°C, making it one of the most versatile temperature sensors used in industry.
The sensing element is made of platinum, which provides excellent stability, accuracy, and repeatability over a broad temperature range.
Typical Pt100 Temperature Range
- Lower limit: -200°C
- Upper limit: +850°C
Common Industrial Operating Ranges
Although a Pt100 is capable of measuring from -200°C to 850°C, many industrial applications operate within narrower ranges such as:
- -50°C to 200°C
- 0°C to 300°C
- 0°C to 600°C
depending on the sensor construction, sheath material, and process conditions.
Why the Other Options Are Incorrect
- 0 to 100°C → Too limited for a standard Pt100.
- 0 to 300°C → Common application range, but not the full typical operating range.
- 100 to 500°C → Only a portion of the available range.
Because platinum RTDs can operate reliably over a very wide temperature span, Option A (-200 to 850°C) is the correct answer. 