Differential pressure (DP) transmitters and gauge pressure transmitters differ in what they measure and their typical applications. Which statement is correct?

Differential pressure (DP) transmitters and gauge pressure transmitters differ in what they measure and their typical applications. Which statement is correct?

• A. DP transducers measure absolute pressure with respect to atmosphere; gauge measures pressure difference across an element.
• B. DP transducers measure pressure difference across a sensor (used for flow); gauge measures absolute or relative pressure with respect to atmosphere.
• C. DP transmitters measure temperature; gauge measures humidity.
• D. DP and gauge are the same; both measure flow.

Answer: (B)