The Rosemount 405 Compact Orifice Flow Element is a high accuracy differential pressure flow element suitable for measuring any clean gas, liquid, or vapor flow. Designed with minimal installation and maintenance requirements, the 405 easily installs between any existing raised face flanges without creating additional pipe penetrations.

The 405 utilizes a self-centering plate, precision honed pipe section and tight machining tolerances to ensure higher installed performance while eliminating installation errors that harm accuracy. The meter is available for line sizes from ½ to 12 inches and can be fit to ANSI, DIN or JIS flanges to 600 pounds (PN 100).

The stainless steel body (316/316L SST with 50 micro-inch Ra surface finish) is rated for temperatures from –40 to 450°F with direct mount applications or –148 to 850°F with remote mount applications. Energy savings are gained through minimal permanent pressure loss.

Real-time mass and energy flow measurements are available with the integral temperature option. The 405 produces the most accurate and repeatable measurement when used in single-phase flow or steam flow above the saturation temperature. It can be directly mounted to any Rosemount differential pressure transmitter to create a complete flow monitoring system.