The Rosemount 1495 Orifice Plate Primary Element is engineered for reliable measurement performance. As the most common primary element used around the globe, this orifice plate offers a standard configuration with a square-edged concentric bore in both paddle and universal-type plates. This product is available in standard line sizes (2 - 24 in. or 50 - 600 mm) and is also suitable in high temperature and pressure applications.