Family Owned & Operated Since 1971• Bakersfield, CA
15 products
Integral orifice primary element for small line sizes (0.5 - 1.5 in. / 15 - 40 mm) — the orifice plate is permanently mounted in a precision-machined meter body, eliminating the centering uncertainty that plagues field-installed plates. Self-centering construction. Best for lab-scale, low-flow, sample-conditioning, and pilot-plant flow measurement where standard orifice fittings are too coarse. Pairs with 3051CFP / 3051SFP / 2051CFP assembled DP flow meters. Wide material variety for chemistry compatibility.
Standard concentric / eccentric / segmental / quadrant orifice plate — the workhorse of differential-pressure flow measurement. Precision-machined per ASME / ISO 5167 standards. Sized to your line size, beta ratio, and material requirements. Used between standard 1496 orifice flange unions for installation. Best for general-purpose flow measurement on clean liquids, gases, and steam where conditioning orifice (405C / 1595) special features aren't needed.
Orifice flange union — paired flanges with integrated tapping points for D-D/2 or flange-tap differential pressure connections. Designed to bolt around a 1495 orifice plate (or any standard orifice plate) and provide stable, leak-free pressure-tap take-offs to the DP transmitter. Slip-on or weld-neck flanges. ANSI 150 through 1500 lb pressure ratings. Carbon steel, stainless steel, or alloy options. The standard installation hardware for orifice-plate flow measurement.
Patented 4-hole conditioning orifice plate — four equally spaced orifices instead of the standard concentric single bore. The four-hole design conditions disturbed flow profiles (eddies, swirl, asymmetry from upstream pipe fittings) BEFORE measurement, eliminating the 10-50 diameters of straight run that ASME orifice plates require. Only 2 diameters upstream and 2 downstream needed — installs in tight piping where standard 1495 plates can't get enough straight pipe. Same materials and beta ratios as standard 1495 plates. Best for retrofit applications and crowded plants.
Pre-assembled DP flow meter on the 2051C platform — combines a 2051C-platform DP transmitter, a Rosemount 405C compact conditioning orifice plate, and a 305 manifold in one factory-assembled, pre-calibrated package. No field assembly, no leak-checking, no separate piping for impulse lines. Drop in between standard process flanges and start measuring. Best for general-purpose closed-loop control and monitoring applications where the 3051C / 3051S premium platforms would be over-spec.
Pre-assembled DP flow meter on the 3051C platform — combines a 3051C Coplanar pressure transmitter, a 405C compact conditioning orifice plate, and a 305 manifold in one factory-assembled package. The 3051C platform adds graphical back-lit display option, Bluetooth configuration, multivariable inputs, and broader output protocol support (HART, WirelessHART, FOUNDATION Fieldbus). Available up to 12 in. (300 mm) line size for gas, liquid, and steam service. The midstream / downstream-grade DP flow meter for plants standardized on the 3051C transmitter.
Pre-assembled DP flow meter on the 3051C platform with a 1195 integral orifice primary element — engineered for highly accurate flow measurement in small line sizes (0.5 - 1.5 in. / 15 - 40 mm). Self-centering integral orifice plate eliminates the centering uncertainty of field-installed plates. Best for lab-scale, sample-conditioning, pilot-plant, and small-line process flow where standard 4-in.-and-up DP flow meters are too coarse. Same 3051C platform features as the 3051CFC: HART, Bluetooth, WirelessHART, FOUNDATION Fieldbus.
Pre-assembled DP flow meter on the 3051S Scalable platform with a 485 Annubar averaging pitot primary element — combines the lowest-permanent-pressure-loss flow technology with the highest-accuracy DP transmitter platform Rosemount makes. SIL 2/3 capable with the QS option. Best for high-pressure / large-line / energy-conscious flow measurement on clean liquids, gases, and steam — where the energy savings from low permanent pressure loss pay back the meter cost. Same 3051S platform features: extreme stability, advanced diagnostics, all output protocols.
Pre-assembled DP flow meter on the 3051S Scalable platform with a 405C compact conditioning orifice — drops in between existing flanges for best-in-class flow measurement in gas, liquid, and steam service. Same 3051S electronics platform as the 3051SFA / 3051SFP: extreme stability, SIL 2/3 capability with QS, advanced diagnostics, all output protocols. The compact-orifice variant for general-purpose measurement on lines too large for integral orifice (3051SFP) but where annubar (3051SFA) low-pressure-loss isn't needed.
Pre-assembled DP flow meter on the 3051S Scalable platform with a 1195 integral orifice primary element — multivariable, easy-to-install, engineered for highly accurate flow measurement in small line sizes (0.5 - 1.5 in. / 15 - 40 mm). Self-centering integral orifice eliminates centering uncertainty. Best for lab-scale, sample, and pilot-plant flow on clean fluids where the 3051S premium electronics platform is preferred (over the 3051CFP) for stability, diagnostics, and SIL 2/3 capability.
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.
Annubar averaging pitot tube primary element — measures the velocity-pressure profile across the full pipe cross-section by sensing at multiple insertion ports. Small in-pipe profile minimizes permanent pressure loss (energy savings) versus orifice plates. Pak-Lok or flanged hot-tap-installable for retrofit on operating lines. Used for liquids, gases, and steam in clean-process applications where a low-permanent-loss flow element is preferred over an orifice. Pairs with the 3051SMV / 4088 multivariable transmitters for compensated mass flow.
Severe-service annubar averaging pitot tube — same flow-sensing principle as the 485, engineered for extreme conditions: process temperatures to 1500°F (815°C), ANSI B16.5 2500# pressures, and aggressive media. Solid sensor construction (no welded joints in the wetted path) for failure-resistant operation in main-steam, hot-flue-gas, and high-pressure-pipeline service. Wide material range (316L, Hastelloy C-276, Alloy 800H) for chemistry compatibility. Used in power-station main-steam flow measurement and other applications beyond the 485's envelope.
Fully AGA / API 14.3 compliant natural gas flow meter in a complete pre-assembled package — orifice meter tube + Simplex Fitting + Rosemount 4088 MultiVariable Transmitter. The Simplex Fitting allows quick orifice plate inspections and changes WITHOUT removing the meter from the line — no flange spreading, no gas leakage, no unscheduled downtime. Bureau of Land Management (BLM) accepted for federal and Indian leases. Pairs with 4088 MV transmitter for fully-compensated mass flow with Modbus or Emerson flow-computer output. The custody-transfer natural-gas DP-flow workhorse.
Pre-assembled DP flow meter for harsh-environment continuous service — combines a 1595-style conditioning orifice plate, integrated impulse lines (no separate piping to install), a 3051S or 3051SMV transmitter, a 305 manifold, and an optional 214C RTD temperature sensor in one factory-assembled, configured, and leak-checked package. Roddable impulse lines let operators clear blockages without disconnecting any piping. Conditioning Orifice Technology eliminates the straight-run requirement, allowing installation at grade level or in difficult piping configurations. Operating range 2-6 in. line size, ANSI 900 max, -20°F to 850°F.