Flow

Flow Measurement for Liquids, Gases & Steam

Endress+Hauser’s flow portfolio covers every major measuring principle used in liquids, gases, and steam, Coriolis (Promass), electromagnetic (Promag), ultrasonic (Prosonic Flow), vortex (Prowirl), thermal mass (t‑mass), and differential pressure (Deltatop with Deltabar). At the platform level, the Proline 300/500 transmitter family brings a consistent HMI, commissioning workflow, and data model across these sensors, while Heartbeat Technology embeds diagnostics, verification, and monitoring to document instrument integrity and expose process insights without stopping the process. For designers and operators, this means you can standardize on one architecture yet optimize per line or utility based on fluid properties, pipe geometry, accuracy, and SIL needs.

Coriolis (Promass) meters are the workhorse for direct mass flow with simultaneous density and temperature; they are independent of viscosity and density and require no inlet runs, making them ideal for high‑value liquids, multivariable control, and custody transfer. Within the line, Promass F attains ±0.05% mass flow accuracy with PremiumCal options, while Promass I adds in‑line viscosity alongside mass, density, and temperature in a straight single‑tube design. For challenging two‑phase liquids, Promass Q applies Multi‑Frequency Technology (MFT) to maintain accuracy in the presence of entrained gas; for the highest capacities (e.g., pipeline loading/unloading), the four‑tube Promass X provides premium accuracy at very large diameters. Typical applications include recipe/mass balance, concentration monitoring, blending, hydrocarbon custody transfer, and cryogenic service.

Electromagnetic (Promag) flowmeters provide volumetric flow for conductive liquids with negligible pressure drop, no moving parts, and a free pipe cross‑section that is CIP/SIP cleanable and piggable, ideal for water/wastewater, slurries, chemicals, and hygienic services. Endress+Hauser augments the core magmeter principle with Heartbeat build‑up monitoring to track deposits and sensor integrity, improving cleaning intervals and availability; Promag W adds sector‑specific functionality, including custody‑transfer approvals for water. For off‑grid assets and buried mains, Promag W 800 integrates a battery‑powered transmitter with secure, worldwide data transmission, enabling metering where power and communications are limited. Typical uses range from raw water intake and distribution networks to corrosive chemical dosing and slurry handling.

Ultrasonic options address both clamp‑on and in‑line needs. Prosonic Flow W 400 is a clamp‑on solution for bidirectional liquid measurement that installs without process interruption and maintains specified accuracy with minimal straight‑run (FlowDC allows as little as 2×DN even with disturbed profiles), making it attractive for retrofits, leak detection, and meter verification on very small to very large pipes. For gases, Prosonic Flow G 300/500 measures both dry and wet gas reliably, even with changing gas properties, and is available with integrated pressure and temperature to compute energy and normalized volumes, supporting natural gas and process‑gas applications.

Vortex (Prowirl) brings robust, no‑moving‑parts volumetric or mass/energy measurement to saturated and superheated steam, gases, and liquids. Prowirl 200 integrates temperature and pressure inputs with embedded steam tables to compute mass and energy in a single device. A distinctive capability is wet‑steam detection with dryness fraction indication, which helps operators recognize water carryover and the risk of water hammer before damage occurs. These meters are widely used for steam distribution, boiler efficiency monitoring, plant energy balancing, and compressed‑gas lines where high turndown and ruggedness are critical.

Thermal mass (t‑mass) meters deliver direct mass flow for utility and process gases with very high turndown and virtually no pressure loss. The t‑mass F/I 300/500 generation adds a “Gas Engine” model to dynamically compensate for temperature, pressure, and gas‑mix composition, enabling accurate consumption metering, leak detection, and cost allocation under changing conditions. For compressed air and other utilities, compact A 150 (inline) and B 150 (insertion) variants provide cost‑effective sub‑metering; for higher‑performance inline needs, t‑mass F 300 offers a drift‑free, SIL‑rated sensor with Heartbeat verification. Typical applications include plant air networks, nitrogen skids, digester gas, flare headers, and HVAC ducts.

Differential‑pressure systems (Deltatop primary elements with Deltabar transmitters) remain the most versatile choice for extreme pressures and temperatures, very large lines, and high‑STEAM‑quality applications. Using standardized primary elements (orifice plates, Venturi tubes, flow nozzles, and Pitot/averaging Pitot), a differential pressure is generated and measured to infer flow; the approach is well understood, robust, material‑agnostic, and suitable for gases, liquids, and steam. Endress+Hauser supplies engineered primary elements with clear guidance on straight‑run requirements per ISO 5167, plus SIL‑capable Deltabar transmitters, allowing you to leverage existing impulse‑line practices while modernizing the transmitter layer.

Across all of these technologies, lifecycle value comes from a common digital backbone. Proline 300/500 offers multi‑protocol connectivity (HART, PROFINET, EtherNet/IP, Modbus, PROFIBUS, FOUNDATION Fieldbus) for seamless DCS integration; local encrypted web‑server access and optional WLAN simplify commissioning and maintenance from a browser without proprietary tools. Heartbeat diagnostics conform to NAMUR NE 107, while built‑in verification documents device integrity for compliance, now even possible remotely for Heartbeat‑enabled flowmeters via the Netilion IIoT ecosystem when connectivity and licensing are in place. The result is a measurement fleet with fewer site visits, traceable verification reports, and richer process data for optimization.

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