Maximum Common Mode Pressure

The common mode pressure rating is the maximum pressure that may be applied to both sides of the diaphragm simultaneously without causing changes in performance to the specifications.

In a fault situation, such as the loss of the pressure connection on either side of the sensor, the line pressure is applied to only one side of the sensor, so the pressure drop across the diagram increases substantially. To avoid problems including device failure, the line pressure must be below the maximum common-mode, proof and burst pressure ratings.