2-Wire Dual Channel Transmitter/Analyzer FLXA21
The FLXA21 is a 2-wire module-type liquid analyzer that can be connected to up to two detectors from pH/ORP meters, conductivity meters, inductive conductivity meters, and dissolved oxygen meters. By connecting two detectors of the same type, it creates a high-precision duplex system for enhanced reliability.
The analyzer continuously monitors detector parameters including impedance, asymmetric potential, and slope, while providing diagnostic status for electrode conditions (dirty, damaged, broken) and low measurement liquid level. This self-diagnosis function significantly reduces maintenance costs and improves operational efficiency.
About OpreX
OpreX is the comprehensive brand for Yokogawa's industrial automation (IA) and control business, representing excellence in related technologies and solutions. The FLXA21 belongs to the OpreX Analyzers family under the OpreX Measurement category.
Key Features of FLXA21
High Reliability with Dual Detector System
- Connect two pH/ORP, conductivity, or dissolved-oxygen detectors of the same type
- Backup system configuration for higher reliability measurements
- Reduced installation costs and space requirements by measuring two different points
- Continuous measurement capability during maintenance operations
- Lower maintenance costs through HART communications
Modular Design for Enhanced Expandability
- Flexible system configuration through modular structure
Advanced Functionality
- Comprehensive detector self-diagnosis (impedance, asymmetric potential, slope)
- Health and maintenance timing forecasts based on calibration history
- Built-in Quick Setup with guided screen instructions
User-Friendly Operation
- Intuitive touch screen interface
- Multiple display modes with customizable options
Wide Sensor Compatibility
Supports connection to various pH/ORP, conductivity, electromagnetic conductivity, and dissolved oxygen detectors.
Multilingual Support
Available in 12 languages: Japanese, English, Chinese, Korean, German, French, Russian, Italian, Spanish, Czech, Polish, and Portuguese.
Safety Certifications
Compliant with KOSHA, ATEX, and various explosion-proof standards including intrinsically safe types (ATEX, IECEx, FM, CSA, NEPSI) and nonincendive (FM, CSA).
Communication Protocols
Supports HART, Profibus, and FieldBus communications.
Technical Specifications
| Area Classification |
General Purpose
Class I Div II (without IS Barrier)
Class I Div I (with IS Barrier) |
| Enclosure Material |
Plastic (Polycarbonate) |
| Housing Rating |
IP66/ NEMA 4A/ CSA 3S |
| Power Supply |
2-wire 24 VDC Loop Powered |
| Output Signal |
Bi-directional HART digital communication, superimposed on mA (4-20 mA) signal
Optional FF (FOUNDATION Fieldbus) and PF (Profibus) communication |
| Intrinsically safe type |
ATEX, IECEx, FM, CSA and NEPSI, and nonincendive of FM and CSA |
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