Yokogawa FLXA21 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Liquid Analyzers

Features of FLXA21

High reliability with two detectors and reduced maintenance and instrumentation costs through digital communications

• pH/ORP, conductivity, and dissolved-oxygen detectors can be connected to two of the same type
• Backup system with two detectors for higher reliability measurements
• Achieved reduced installation cost and space saving by measuring two different points
• Two detectors enable continuous measurement without interruption during maintenance
• Reducing maintenance/instrumentation costs through HART communications

Improvement of expandability by modular structure

• Rich system construction by modular structure

Equipped with various advanced functions

• Self-diagnosis function of the detector
  The impedance, asymmetric potential, slope, etc. of the detector are constantly measured
• Health and maintenance timing forecasts
  Saves the latest five calibration results and predicts future maintenance and calibration timing
• Built-in Quick Setup
  Screen instructions (guides) for easy minimal set-up

Touch screen for improved operability and enhanced operation screens

• Reliable, friendly operation while interacting with the screen
• Various display modes are available, and a high degree of freedom can be selected.

Sensors suited for a wide range of applications

• Can be connected to various types of pH/ORP, conductivity, electromagnetic conductivity, and dissolved oxygen detectors

Selectable from 12 languages

• Japanese, English, Chinese, Korean, German, French, Russian, Italian, Spanish, Czech, Polish, Portuguese

Compatible with KOSHA, ATEX and various other types of explosion-proof

• Intrinsically safe type of ATEX, IECEx, FM, CSA and NEPSI, and nonincendive of FM and CSA.

Supports communication

• HART, Profibus, FieldBus

Common specification

Features of pH and ORP measurement

Built-in calibration standard table, with temperature compensation function and stability check function, realizes high-precision pH measurement.
In addition to pH measurements, temperature and redox potential (ORP) can also be measured.
As a diagnostic function of the detector, impedance, asymmetric potential, slope, etc. are constantly measured to continuously diagnose the state of the detector such as dirt/damage of the electrode, disconnection, and lowering of the measuring liquid level. In addition, the latest five calibration results are stored to predict future maintenance and calibration timing.

pH and ORP measurement specification

Features of conductivity measurement

Built-in temperature compensation function and calibration standard table enable monitoring of the contamination of the cell for higher accuracy conductivity measurement.
Highly versatile, cell constants from 0.005 to 50 cm-1, two-way and four-way detectors are available.
It also supports five types of temperature detectors for accurate temperature compensation.
Performs pure water compensation in the analysis of demineralized water, steam, condensate, and boiler water. For monitoring of pure water in the pharmaceutical industry, the process liquid quality can be monitored according to the water quality standards of the USP item <645> (refer to item 645 of USP23 Article) guidance (USP).

Conductivity measurement specification