What does a differential pressure transmitter mounted on a non-vented vessel measure?

A differential pressure transmitter mounted on a non-vented vessel primarily measures the level of the product within the vessel by assessing the pressure difference between the top and bottom of the vessel. However, in the context of certain applications, especially involving a non-vented arrangement, it can also be utilized to infer the density of the product in the vessel based on the differences in pressure readings.

When the transmitter measures the pressure at two different points, it can provide important data regarding the hydrostatic pressure created by the liquid column. If the transmitter is calibrated appropriately, these readings can be converted into density measurements by taking into account the specific gravity of the fluid and the height of the liquid column. Thus, in specific scenarios related to density measurements, the differential pressure transmitter can reflect the density of the product in the vessel effectively.

This functionality makes it a versatile tool in processes where knowing the density is essential for operations or safety.