plc automation


IN STOCK Yokogawa FLXA21 2-Wire Analyzer Liquid Analyzers FLXA21-D-P-D-AA-P1-NN-A-N-LA-N-NN/U Dual Channel Transmitter

description:The model FLXA®21 2-Wire Analyzer, one model of FLEXA® series, offers single or dual sensor measurement. ...

IN STOCK Yokogawa FLXA21 2-Wire Analyzer Liquid Analyzers FLXA21-D-P-D-AA-P1-NN-A-N-LA-N-NN/U Dual Channel Transmitter


Product Description

What is Fieldbus

Fieldbus Foundation defines "Fieldbus is a digital, two-way, multi-drop communication link among intelligent measurement and control devices." It is one of several local area networks dedicated for industrial automation. The Internet is having a major impact on information flows. Yesterday's hierarchical systems the field signals used in process instrumentation have been standardized so that control systems and field devices from a variety of suppliers can be interconnected using standard 4 to 20 mA analog signals. A "standardized" digital communication for industrial automation is changing the production system.

The FOUNDATION™ fieldbus standard developed by the Fieldbus Foundation™ constitutes the next level of standardization and it is designed to meet modern needs.  In addition to having interconnectivity equivalent to that available using 4 to 20 mA analog signals in a conventional field network, FOUNDATION™ fieldbus allows multiple devices to be connected to a single FOUNDATION™ fieldbus, permits the interactive communication of various types of information, and enables the distribution in the field of intelligent functions including self-diagnostics and control functionality.

When FOUNDATION™ fieldbus was first proposed, more attention was given to its ability to convey multiple field signals over a single cable and the benefit this would have in reducing wiring costs. But now the focus is on its ability to transmit various types of information in addition to field signals and to distribute intelligence to distributed field devices. These features enable remote monitoring, real-time self-diagnostics, and proactive maintenance of field devices, as well as plant resource management using field communication. This will enable the costs of operating instrumentation systems to be greatly reduced.

  • Universal conductivity/resistivity, software switchable
  • On-line sensor checking
  • Event logbook in software
  • Matrix temperature compensation for pure water applications
  • Password protection for all levels of software
  • Intrinsically safe version and non-incendive versions
  • Pharmaceutical pure water monitoring (USP23)
  • Autoranging from 0.01 µSxC.C to 200mSxC.C.
  • HART, Foundation Fieldbus, or Profibus Communications options
  • Extremely wide measuring range (> 6 decades) while maintaining a high resolution and accuracy using only one sensor type.
  • Free programmable setting of the output range, including a 21-step table output to linearize the output function e.g. to % by weight.
  • Programmable % by weight display indication.
  • Can be password protected

Product selection:

Model Code FLXA21-D-P-D-A*-C1-NN-F-N-LA-N-NN FLXA21-D-P-D-C*-C1-NN-F-N-LA-N-NN
Area Classification  General Purpose
  • Class I Div II (without the use of IS Barrier)
  • Class I Div I (with the use of IS Barrier)
Measurement Type Contacting Conductivity, Resistivity
Enclosure Material Plastic (Polycarbonate)


 Model & Suffix Codes






1: When a 2nd input is selected, only the same kind of the 1st input is available. For example, when a 1st input is “-P1”, the 2nd input must be the same “-P1”. The combination of ISC and ISC is not available. And, the combination of SENCOM sensor and SENCOM sensor is not available, either.


2: These languages are message languages on the analyzer’s display. One analyzer has English and 11 languages. All languages are as follows; English, Chinese, Czech, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian and Spanish.


3: When an analyzer is used in Japan, it must meet the Japanese Measurement Law. Only SI units must be used on the analyzer and its documents in Japan.


4: The universal mounting kit contains the pipe and wall mounting hardware (/U) and the panel mounting hardware (/PM). 5: The type “-CD” is intrinsic safety of FM and CSA, and non-incendive of FM and CSA. Temperature classes are T4.


6: This input is to be come from an analog pH/ORP sensor.


7: When the analyzer is connected with the digital sensor, FU20F pH/ORP SENCOM Sensor, only the following model is available; 2nd input: Without input (-NN)


8: The FLXA21 has other output types of “FOUNDATION Fieldbus” communication (suffix code: -F) and “PROFIBUS PA” communication (suffix code: -P). Refer to GS 12A01A02-71E and GS 12A01A02-72E.


9: The type “-CB” intrinsic safety type of ATEX and IECEx can be used with SENCOM sensor. Temperature class is T4. Product registration is done by Yokogawa Taiwan Corporation as an importer in Taiwan.


10: The type “-EG” intrinsic safety type of KOSHA for Korea. Temperature class is T4.


11: The type “-AQ” is General purpose type of EAC with Pattern Approval for Russia. 12: The type “-AR” is General purpose type of EAC for Kazakhstan and Belarus.



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