What temperature range do resistance thermometers typically measure in?

Resistance thermometers, also known as resistance temperature detectors (RTDs), are designed to measure a specific range of temperatures based on the principle that a material's electrical resistance changes with temperature. Typically, resistance thermometers can accurately measure temperatures in a range that usually spans from around -200 to 850 degrees Celsius, which translates to approximately -328 to 1562 degrees Fahrenheit.

Among the options provided, the range of -40 to 400 degrees Fahrenheit is representative of a commonly used temperature measurement range for RTDs in various industrial applications. This range encompasses many scenarios where temperature monitoring and control are critical, such as in HVAC systems, manufacturing processes, and food processing.

The other options extend beyond the commonly recognized ranges for standard resistance thermometers, which might not provide reliable readings in those temperature extremes. Consequently, the temperature range of -40 to 400 degrees Fahrenheit aligns well with the operational limits for resistance thermometers, making this the appropriate choice.