E+H Proline Promass A 300 Coriolis Flowmeter

High-Precision Micro-Flow Coriolis Measurement Solutions

In automated industrial processing, tight control over additive injection, chemical dosing, and active pharmaceutical ingredient (API) metering is essential for maintaining product purity and preventing raw material waste. The Endress+Hauser Promass A 300 Coriolis Mass Flowmeter provides an ultra-precise, reliable solution specifically constructed for micro-flow and low-flow environments. As a professional global distributor of leading industrial automation and process instrumentation, we source and deliver genuine Endress+Hauser field instruments designed to meet demanding global engineering requirements.

The Promass A 300 sensor features a high-frequency, self-drainable single-tube system supported by an internal balancing mechanism. This advanced mechanical architecture isolates the sensitive measuring element from external pipe vibrations, pressure shocks, and ambient noise. As a result, the meter provides accurate, highly repeatable measurement down to minute flow rates. Whether managing high-pressure catalysts, aggressive acids, or high-purity solvents, the Promass A 300 maintains stable measurement regardless of changing fluid viscosities and densities.

Advanced Compact Transmitter Architecture & Connectivity

Unlike traditional multi-box instrumentation setups, the Promass A 300 integrates a compact dual-compartment transmitter housing designed for easy access, space-constrained skid installations, and harsh environmental conditions. The transmitter offers multi-variable process data logging and seamlessly integrates into modern industrial Internet of Things (IIoT) control systems.

Key functional features include:

• Flexible I/O Combinations: Configurable up to 3 I/O channels, enabling customized signal combinations (4-20 mA HART, pulse/frequency/switch output, and relay outputs) without changing system hardware.

• Comprehensive Digital Protocols: Native support for HART, PROFIBUS DP/PA, FOUNDATION Fieldbus, Modbus RS485, PROFINET, EtherNet/IP, and Ethernet-APL for high-speed digital automation networks.

• User-Friendly Interface: Clear 4-line backlit display with optical touch control, integrated web server access, and optional WLAN connectivity for wireless parameterization and maintenance.

Simultaneous Multivariable Process Monitoring

The Promass A 300 operates as a comprehensive process analytical unit rather than a simple flow sensor. A single inline installation allows continuous real-time measurement of multiple key variables:

• Mass Flow Rate

• Volume Flow Rate

• Fluid Density & Reference Density

• Process Medium Temperature

By combining these measurements into one compact instrument, plant engineers can streamline piping design, eliminate extra process penetrations, and lower total installation costs. High-grade wetted materials—including Stainless Steel 1.4435 (316/316L) and corrosion-resistant Alloy C22—guarantee long service life when handling aggressive or corrosive fluids.

Enhanced Process Safety & Integrated Heartbeat Technology

To uphold strict quality standards (such as ISO 9001 and SIL functional safety requirements), the Promass A 300 incorporates Endress+Hauser’s Heartbeat Technology. This internal diagnostic and verification suite continuously monitors sensor health, electronics, and measuring accuracy in real time without interrupting ongoing process operations. Maintenance teams can run automated, traceable device verifications at any time, generating compliance reports directly for preventive maintenance logs and safety audits.

Applications

• Chemical Industry: Precise low-flow injection of catalysts, inhibitors, additives, acids, and high-pressure chemical reactions.

• Pharmaceutical & Biotechnology: Sterile liquid dosing, micro-batch ingredient feeding, high-purity water systems, and active ingredient metering.

• Food & Beverage: Flavoring, liquid colorant, essential oil, and aroma injection lines requiring hygienic single-tube self-drainage.

• Oil & Gas / Energy: Corrosion inhibitor injection, gas line odorant injection, and high-pressure chemical dosing skids.

• Research & Laboratories: Test benches, pilot plants, and compact OEM skid packages requiring high precision micro-flow metering.

Technical Specifications

• Measuring Principle: Coriolis Mass Flow Measurement

• Nominal Diameter Range: DN 1 to 4 (1/24″ to 1/8″)

• Wetted Materials:

  • Measuring tube: Stainless Steel 1.4435 (316/316L); Alloy C22

  • Process connections: Stainless Steel 1.4404 (316/316L); Alloy C22

• Measured Variables: Mass flow, volume flow, density, reference density, temperature, corrected volume flow

• Max. Measurement Error:

  • Mass flow (liquid): ±0.1 % of reading

  • Volume flow (liquid): ±0.1 % of reading

  • Mass flow (gas): ±0.35 % of reading

  • Density (liquid): ±0.0005 g/cm³

• Measuring Range: 0 to 450 kg/h (0 to 16.54 lb/min)

• Max. Process Pressure: Up to 430.9 bar (6250 psi)

• Medium Temperature Range: -50 to +205 °C (-58 to +401 °F)

• Ambient Temperature Range: -40 to +60 °C (-40 to +140 °F)

• Transmitter Housing Material: Coated Die-cast Aluminum (AlSi10Mg) or Stainless Steel 1.4409 (CF3M)

• Degree of Protection: IP66/67, Type 4X enclosure; IP69 for hygienic designs

• Display / Operation: 4-line backlit display with touch control; web server access; optional WLAN

• Digital Communication / Fieldbuses: HART, PROFIBUS DP/PA, FOUNDATION Fieldbus, Modbus RS485, PROFINET, EtherNet/IP, Ethernet-APL

• Power Supply: DC 24 V; AC 100 to 230 V

• Hazardous Area Approvals: ATEX, IECEx, cCSAus, NEPSI, INMETRO, UK Ex

• Safety & Quality Certifications: SIL 2/3, CE, 3-A, cGMP, CRN, PED

FAQ

Q1: What is the main operational difference between Promass A 200 and Promass A 300? A1: While both use the same high-precision micro-flow single-tube sensor, the Promass A 200 is a loop-powered 2-wire device, whereas the Promass A 300 features a compact 4-wire transmitter offering expanded I/O options, advanced communication protocols (such as PROFINET and EtherNet/IP), and integrated web server functionality.

Q2: Is your company the original manufacturer of the Promass A 300? A2: No, we are an independent distributor of industrial automation instruments. We supply authentic, factory-new Endress+Hauser devices with full technical support, configuration assistance, and global export services.

Q3: How does the single-tube design benefit hygienic and chemical applications? A3: The single-tube design is fully self-drainable, eliminating internal dead legs or pockets where fluids could collect or clog. This ensures complete drainability and easy cleaning for hygienic or corrosive chemical processes.

Q4: Can the Promass A 300 be configured and verified remotely? A4: Yes, the transmitter supports configuration via local optical touch display, integrated web server, or wireless connection via WLAN. Onboard Heartbeat Technology allows remote device verification and diagnostic checking without interrupting process flow.

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