OSIsoft.AF.UnitsOfMeasure Namespace
- Last UpdatedNov 18, 2025
- 3 minute read
- PI System
- AF SDK 2024 R2
- Developer
The OSIsoft.AF.UnitsOfMeasure namespace provides a set of classes for defining a units-of-measure system. This UOM system can be utilized to describe an attribute or value's unit of measure and to perform conversions from one unit to another unit.
There is a single units-of-measure database on a PISystem that is shared across all databases.
Classes
| Class | Description | |
|---|---|---|
  | UOM |
The unit-of-measure object describes the units of a value.
|
| UOMBaseClass | |
| UOMBaseClasses |
A collection of base unit-of-measure classes (UOMBaseClass).
|
| UOMClass |
The unit-of-measure class (UOMClass) represents a group of
units of measure and describes the fundamental dimensions of their
measurements.
|
| UOMClasses |
The collection of UOMClass objects.
|
| UOMDatabase |
The UOMDatabase is the top-level object in the
OSIsoft.AF.UnitsOfMeasure namespace which provides a set of
classes for describing a value's unit of measure and for converting
from one unit to another unit.
|
| UOMGroup | |
| UOMGroups |
The collection of UOMGroup objects.
|
| UOMs |
A collection of unit-of-measure objects (UOM).
|
