What is the major difference between an electronic force balance transmitter and a pneumatic DP cell?

The major difference between an electronic force balance transmitter and a pneumatic differential pressure (DP) cell lies in their output devices. An electronic force balance transmitter typically produces an electrical signal, which allows for more precise and easily transmitted measurements. These transmitters utilize electronic components and can interface with digital control systems, providing high accuracy and rapid response times.

On the other hand, a pneumatic DP cell generates a pneumatic output, which means it produces a pressure signal that is transmitted through air or gas. This pneumatic output method is more susceptible to issues such as dead time and degradation over longer distances, especially in a pneumatic system.

While pressure range, calibration method, and fluid type can vary between these devices, their fundamental distinction is found in the type of output they generate, which significantly influences their applications and performance characteristics in instrumentation systems.