Rosemount 405 Compact Primary Element

Rosemount1 configuration

Configure Your Rosemount 405 Compact Orifice Flow Element

Compact wafer-style orifice flow element. Available as 405P (standard concentric orifice plate) or 405C (patented 4-hole conditioning orifice for short-straight-run installations). Drops between standard process flanges with no manifold or flange union required. Used as the orifice in 2051CFC / 3051CFC / 3051SFC assembled DP flow meters.

Required Specifications

5 of 5 selected

Primary Element Technology*

Line Size*

100

Temperature Measurement*

Primary Element Type*

000

Transmitter Connection*

Rosemount 405 Compact Orifice Flow Element Part Number

405PS100N000D3

Configured list price:$4,166.14(estimate based on May 2026 Rosemount list; quote may reflect distributor pricing)

Configuration Summary — Rosemount 405 Compact Orifice Flow Element

Base: $1,845.22

Primary Element Technology:: POrifice plate
Line Size:: 10010" (250 mm)+$2,320.92
Temperature Measurement:: NNo temperature measurement
Primary Element Type:: 000Annubar sensor size 1
Transmitter Connection:: D3Direct mount

Rosemount is configurator-heavy and quote-only — Valley Instrument verifies option compatibility, lead time, and pricing before confirming your order.

Pre-configured Options(1)

Rosemount

405 Compact Primary Element

Compact primary element with three sensing technologies in one form factor — 405 (standard orifice plate), 405C (patented 4-hole conditioning orifice), or 405A (compact annubar / averaging pitot). Wafer-style installation between standard process flanges; no separate manifold or flange union required. The conditioning orifice (405C) variant requires only 2 diameters of straight pipe upstream and downstream — best in tight piping. Used as a low-cost, drop-in solution for closed-loop control, general-purpose flow monitoring, and lower-tier custody transfer.

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