Yokogawa FLXA21 Two-Wire Liquid Analyzer

 (Model: FLXA21-D-P-D-AB-C1-NN-A-N-LA-N-NN/UM)

The Yokogawa FLXA21 is a versatile, loop-powered, two-wire liquid analyzer designed for continuous in-line measurement of key water quality parameters in demanding industrial processes. This specific configuration is engineered for reliable pH/ORP (Oxidation-Reduction Potential) and conductivity/resistivity measurement, providing critical data for process control, quality assurance, and environmental compliance with minimal installation complexity.

Key Features and Product Highlights

• Two-Wire, Loop-Powered Design: Operates on a standard 4-20mA current loop, significantly simplifying installation by combining power and data transmission over a single pair of wires. This reduces wiring costs and is intrinsically safe for hazardous areas.

• Multi-Parameter Capability: A single unit can be configured to measure pH, ORP (mV), conductivity, or resistivity, making it a flexible solution for various monitoring points without needing multiple instruments.

• Dual-Sensor Input: Supports the connection of two sensors simultaneously (e.g., a pH electrode and a temperature compensator), allowing for automatic temperature compensation (ATC) to ensure measurement accuracy across varying process temperatures.

• Advanced Communication & Diagnostics: Features HART 7 protocol communication digital superimposed on the 4-20mA signal. This enables remote configuration, detailed diagnostics, and access to secondary measured values via a HART communicator or host system.

• Robust Industrial Construction: Housed in a rugged, IP66/NEMA 4X polycarbonate enclosure, making it suitable for installation in harsh outdoor or washdown environments. It is designed to withstand corrosive atmospheres.

• Large, Clear Display: A backlit LCD provides clear visibility of the primary measured value, status, and alarms for local operator interaction.

Technical Specifications

Applications

• Water & Wastewater Treatment: Monitoring pH for neutralization, ORP for chlorination/disinfection, and conductivity for salinity/TDS in influent, process, and effluent streams.

• Chemical Processing: Precise pH control in reactors, scrubbers, and neutralization tanks.

• Pharmaceutical & Biotechnology: Monitoring water purity (conductivity/resistivity) in Water-for-Injection (WFI) and Pure Water (PW) systems.

• Power Generation: Monitoring boiler feedwater and condensate quality.

• Food & Beverage: Process control and quality monitoring in various production stages.

FLXA21-D-P-D-AB-C1-NN-A-N-LA-N-NN/UM

 2-Wire Analyzer | pH/ORP/Conductivity | Loop Powered

Yokogawa 

Yokogawa FLXA21 two-wire liquid analyzer. Measures pH, ORP, conductivity/resistivity. 4-20mA HART, loop powered, IP66/NEMA4X, for process control.

• Reduced Installation Cost: The two-wire design cuts cable and conduit requirements by half compared to four-wire analyzers.

• Unmatched Flexibility: One hardware platform can be reconfigured in the field for different measurements, protecting your investment.

• Yokogawa Reliability: Built with the quality and precision synonymous with the Yokogawa brand, ensuring long-term stability and minimal drift.

• Comprehensive Diagnostics: HART communication allows for remote troubleshooting and predictive maintenance, reducing downtime.

• Global Compliance: Meets stringent international standards for safety (ATEX) and functional safety (SIL 2).

  2-Wire Dual Channel Transmitter/Analyzer FLXA21