FLXA21 Yokogawa 2-Wire Analyzer for Dissolved Oxygen & pH
Manufacturer: Yokogawa
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Part Number: FLXA21
Condition：New with Original Package
Product Type: Liquid Analyzers
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Country of Origin: Japan
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The Yokogawa FLXA21 functions as a highly versatile, loop-powered liquid transmitter designed for rigorous online process monitoring. This 100% brand new original analyzer utilizes a modular architecture to provide real-time data for pH, ORP, conductivity, and dissolved oxygen. By supporting dual-sensor inputs, the FLXA21 reduces installation costs and cabinet space while delivering the precision required for chemical processing, pharmaceutical manufacturing, and water treatment utilities.
Part Number Breakdown: FLXA21
| Suffix Code | Description |
| -D | Digital Sensor Communication |
| -A | Analog Sensor Input |
| -P | pH/ORP Measurement |
| -C | Contacting Conductivity Measurement |
| -I | Inductive Conductivity Measurement |
| -D | Dissolved Oxygen Measurement |
| -2 | Dual Sensor Input (Redundant or Differential) |
Technical Specifications
The FLXA21 integrates sophisticated signal processing into a NEMA 4X rated enclosure to ensure stable measurements in corrosive environments.
| Feature | Specification |
| Model Number | FLXA21 |
| Measurement Parameters | pH, ORP, Contacting/Inductive Conductivity, DO |
| Sensor Channels | Single or Dual (Mix-and-match capable) |
| Power Supply | 2-wire Loop-powered (Nominal 24V DC) |
| Communication | HART, FOUNDATION Fieldbus, PROFIBUS PA |
| Enclosure Rating | IP66 / NEMA 4X (Stainless Steel or Plastic) |
| Operating Temperature | –20°C to +55°C |
| Display | Backlit LCD with Touch-screen Operation |
| Diagnostics | Continuous sensor health & impedance monitoring |
| Approvals | ATEX, IECEx, FM, CSA (Hazardous Area Ready) |
Engineering Advantages
The FLXA21 solves critical process analytical challenges through innovative hardware and software design:
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Reduces Total Cost of Ownership: The dual-sensor input capability allows one FLXA21 to perform the work of two traditional transmitters. Engineers can configure the unit for redundant measurement (safety) or differential measurement (process efficiency), effectively halving the required wiring and hardware footprint.
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Simplifies Calibration and Maintenance: The analyzer features a "Sensor Wellness" diagnostic tool. It constantly monitors electrode impedance and reference junctions, notifying operators of sensor aging before a failure occurs. This proactive approach prevents process downtime and accidental chemical over-dosage.
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Streamlines Field Commissioning: An intuitive touch-screen interface supports 12 languages and provides step-by-step calibration wizards. This allows field technicians to calibrate pH or conductivity loops quickly without referring to complex paper manuals.
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Ensures Network Compatibility: Robust support for HART, PROFIBUS, and FOUNDATION Fieldbus enables seamless integration into existing DCS or PLC networks. This connectivity provides access to advanced secondary variables and diagnostic data remotely.
FAQs
Does the FLXA21 support digital sensors from other manufacturers?
The FLXA21 optimizes performance when paired with Yokogawa's SENCOM digital sensors. While it supports standard analog sensors via its modular input cards, we recommend using genuine Yokogawa sensors to utilize the full diagnostic and auto-recognition capabilities of the analyzer.
Can I convert a single-channel FLXA21 to a dual-channel unit in the field?
Yes. Due to its modular design, you can add a second sensor module to an existing single-channel unit. This flexibility allows facilities to expand their monitoring capabilities as process requirements evolve without replacing the entire transmitter.
How does the unit handle installation in hazardous or explosive environments?
Yokogawa offers the FLXA21 with multiple explosion-proof and intrinsically safe ratings, including ATEX, IECEx, and FM. Ensure you select the correct suffix code for your specific zone requirements to maintain facility safety compliance.
Is this unit supplied as brand new?
Every FLXA21 we ship is 100% brand new and original, sourced directly from the manufacturer’s supply chain. Each unit undergoes rigorous factory testing and arrives with a Certificate of Origin (COO) and official test reports.