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01Temperature MeasurementTemperature measurement uses temperature sensors, thermocouples, RTDs and other instruments to accurately detect and monitor process temperatures. 02Level MeasurementLevel measurement uses ultrasonic level meters, radar level meters, and other instruments to detect and monitor the level or height of materials in tanks, vessels, and process equipment. 03Pressure MeasurementPressure measurement uses pressure transmitters, differential pressure transmitters, and other instruments to detect and monitor pressure and pressure changes in pipelines, tanks, and process equipment. 04Flow measurementFlow measurement uses electromagnetic, ultrasonic, vortex, and mass flow meters to detect and monitor the flow of liquids, gases, or steam in pipelines. 05DCSYokogawa DCS cards are core modules of a distributed control system, used to acquire field signals such as temperature, pressure, and flow, while providing control, output, and communication functions. 06Water Quality AnalysisWater quality analysis uses water quality analyzers and online monitoring instruments to detect and monitor key parameters such as pH, dissolved oxygen, turbidity, conductivity, and residual chlorine in water. MODELE+H Proline Promass I 100 Coriolis FlowmeterDesigned for accurate multi-variable measurement of liquids and gases, this Coriolis flowmeter delivers simultaneous in-line viscosity, density, and mass flow data with minimal pressure loss. It features an ultra-compact transmitter and a robust single-tube titanium measuring system for demanding industrial processes. MODELYOKOGAWA A2EE3A-TN | ESB Bus Adapter Connector UnitThe YOKOGAWA A2EE3A-TN ESB Bus Adapter is engineered for Yokogawa CENTUM VP system architecture to connect and terminate the ESB bus at ANT522 optical repeater slave modules. Built for secure terminal connection and signal stability, this component ensures seamless communication extension across industrial automation networks. MODELE+H Levelflex FMP56 Guided Wave Radar Level TransmitterDesigned for continuous level measurement of powdery to granular bulk solids in tall silos and storage vessels, this cost-effective guided wave radar transmitter remains unaffected by heavy dust, filling noise, or thermal stratification. Featuring a high-tensile rope probe capable of withstanding pulling forces up to 12 kN, it integrates HistoROM data management and optional Bluetooth functionality for safe and efficient operation. MODELE+H Proline Promass X 300 Coriolis Mass FlowmeterThe Endress+Hauser Proline Promass X 300 is a maximum-capacity Coriolis mass flowmeter engineered for high-volume measurement of crude oil, refined hydrocarbons, chemicals, and industrial gases up to 4,100 t/h. 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MODELE+H FMU30 Non-Contact Ultrasonic Level TransmitterThe Prosonic FMU30 Non-Contact Ultrasonic Level Transmitter provides highly accurate, maintenance-free continuous level and open-channel flow measurement for liquids, pastes, and coarse bulk solids across municipal and industrial applications. Featuring an integrated temperature sensor for automatic sound velocity compensation, a user-friendly 4-line plain text display with 32-point linearization, and a rugged IP68-rated weatherproof enclosure, this compact 2-wire transmitter delivers dependable real-time tank monitoring, pump control, and overflow protection in sewage treatment plants, process water storage, and chemical buffer tanks. MODELE+H Deltabar PMD55B High Precision Smart Differential Pressure TransmitterThe PMD55B High Precision Smart Differential Pressure Transmitter delivers exceptionally accurate differential pressure, flow, and hydrostatic level measurements for industrial liquids, gases, and steam. Featuring a robust metallic diaphragm, ultra-low long-term drift, optional wireless Bluetooth operation, and SIL2/3 functional safety certifications, this versatile instrument provides stable, error-free process monitoring across harsh chemical, oil, and water treatment environments. MODELE+H Waterpilot FMX11 Submersible Hydrostatic Level TransmitterThe Waterpilot FMX11 is a high-precision, heavy-duty submersible hydrostatic level transmitter engineered for continuous liquid level and depth monitoring in fresh water, groundwater wells, drinking water reservoirs, and surface water bodies. Featuring an ultra-compact 22mm stainless steel 316L housing, an integrated atmospheric pressure compensation tube with a protective Teflon filter, and international drinking water certifications, this compact dip cell sensor delivers exceptional long-term stability and precise 4–20 mA signal output even in narrow 1-inch pipes and demanding environmental conditions. MODELChongqing Chuanyi WZGPK-73DH-GB/1P2-AJ150G-M20XC6-AXX-I5/2AM20 Explosion-proof RTDThe WZGPK is a heavy-duty explosion-proof armored Pt100 RTD temperature sensor engineered for accurate thermal monitoring in hazardous industrial environments. Equipped with a high-precision Class A platinum sensing element, a 3-wire connection, a 6mm diameter sheath made of durable 321 stainless steel, and a 150mm insertion length, this flameproof sensor delivers exceptionally fast thermal response, vibration resistance, and long-term stability across a wide temperature range from -200°C to 600°C. Designed with an M20x1.5 process thread and an explosion-proof junction box, it provides reliable flameproof protection and continuous signal accuracy for chemical plants, oil refineries, and automated process control systems. MODELYokogawa ADV151-P50/D5A00 Digital Input Module ExstockEngineered for reliable industrial automation, the Yokogawa ADV151-P50/D5A00 Digital Input Module provides high-density 32-channel, 24 V DC isolated signal processing alongside dedicated connection adapters, ensuring optimal signal integrity, robust noise immunity, and seamless integration into distributed control systems (DCS). MODELYokogawa AAI143-H50 Analog Input Module ExstockThe Yokogawa AAI143-H50 is a high-performance 16-channel isolated analog input module designed for process automation systems, capable of handling 4 to 20 mA standard signal inputs with exceptional stability and accuracy. Supplied with its matching terminal block adapter, this module offers seamless integration, superior noise immunity, and reliable data acquisition for demanding industrial environments. MODELYokogawa S2CP471-01 Controller Module Spare Part ExstockThe Yokogawa S2CP471-01 Controller Module Spare Part provides reliable, real-time control performance and high-speed VNET/IP communication connectivity to optimize your industrial DCS automation system with seamless integration and reduced operational downtime. SOLUTIONSmart water network monitoringCombine verified flow and pressure data for distribution monitoring and operational review. SOLUTIONHydrogen pressure measurementReview materials, pressure range and safety requirements for hydrogen process measurement. SOLUTIONProcess measurement selectionStart from the medium, operating window, installation and required signal before selecting an instrument.

Product Overview

E+H Proline Promass A 300 Coriolis Flowmeter

Proline Promass A 300

The Endress+Hauser Promass A 300 is a compact, single-tube Coriolis mass flowmeter specially designed for high-precision, low-flow measurement of liquids and gases in chemical, pharmaceutical, and high-pressure dosing systems. Featuring a fully self-drainable measuring tube and an integrated compact transmitter, it delivers simultaneous real-time monitoring of mass flow, density, and temperature with minimal maintenance requirements.

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Endress+Hauser Promass A 300 Coriolis flowmeter for micro-flow dosing

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.

Endress+Hauser Promass A 300 MeterApplications

  • 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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