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Xi'an Xiyi Central Control Technology Co., Ltd.

  • China ,Shaanxi
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China 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Yokogawa FLXA21 Liquid Analyser
China 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Yokogawa FLXA21 Liquid Analyser

  1. China 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Yokogawa FLXA21 Liquid Analyser
  2. China 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Yokogawa FLXA21 Liquid Analyser
  3. China 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Yokogawa FLXA21 Liquid Analyser
  4. China 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Yokogawa FLXA21 Liquid Analyser
  5. China 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Yokogawa FLXA21 Liquid Analyser
  6. China 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Yokogawa FLXA21 Liquid Analyser

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

  1. MOQ: 1 pc
  2. Price: USD 1600
  3. Get Latest Price
Payment Terms T/T
Supply Ability 100 pc
Delivery Time 7-14 days
Material Stainless Steel 316L
Ingress Protection IP67
Certifications CE, RoHS
Power Supply 12-36 VDC
Communication Protocol HART
Port Size 1/4 NPT
Protection Class IP65
Housing Material Aluminum alloy
Electrical Connection M12 Connector
Range 0-10,000 psi
Model 3051GP
Protection Rating IP67
Process Connection 1/2 inch NPT
Signal Output 4-20mA 0-20mA 1-5V 0-5V
Brand Name Yokogawas
Model Number FLXA21
Place of Origin China

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  1. Product Details
  2. Company Details

Product Specification

Payment Terms T/T Supply Ability 100 pc
Delivery Time 7-14 days Material Stainless Steel 316L
Ingress Protection IP67 Certifications CE, RoHS
Power Supply 12-36 VDC Communication Protocol HART
Port Size 1/4 NPT Protection Class IP65
Housing Material Aluminum alloy Electrical Connection M12 Connector
Range 0-10,000 psi Model 3051GP
Protection Rating IP67 Process Connection 1/2 inch NPT
Signal Output 4-20mA 0-20mA 1-5V 0-5V Brand Name Yokogawas
Model Number FLXA21 Place of Origin China
High Light 2-wire dual channel transmitterYokogawa FLXA21 liquid analyzerPH ORP industrial transmitter

1. Overview

  • The FLXA21 is a 2‑wire, dual-channel liquid analyzer from Yokogawa.
  • It supports two sensor inputs of the same type, enabling duplex measurement or redundancy.
  • Compatible with a variety of detectors: pH/ORP, conductivity (contacting), inductive conductivity, and dissolved oxygen.
  • Part of Yokogawa’s OpreX measurement family.

 

2. Key Features

Feature

Description

Redundancy / Dual Input

Can connect two sensors of the same type (e.g., two pH probes) for backup/reliable measurement or continuous operation during maintenance.

Self-Diagnosis

Continuously monitors the detector for impedance, slope, asymmetric potential, etc., to detect issues such as dirty or damaged electrodes or low liquid level.

Maintenance Forecasting

Saves the last five calibrations and predicts when maintenance or recalibration is needed.

User Interface

Touch screen with guided “Quick Setup” menus.

Modular Design

Modular structure allows flexible system configuration and easy expansion

Language Support

Interface supports 12 languages (e.g., English, Chinese, Japanese, German, etc.).

Certifications

Available in intrinsically safe versions: ATEX, IECEx, FM, CSA, NEPSI.

Communication

Standard output is 4–20mA + HART. Optionally supports FOUNDATION Fieldbus or PROFIBUS.

 

3. Performance / Specs

Here are some key technical specifications from the manufacturer:

Parameter

Specification

Power Supply

2-wire loop-powered, 24 VDC

Housing / Enclosure

Polycarbonate or stainless steel; rated IP66 / NEMA4X

Operating Temperature

–20°C to +55°C (typical)

Measurement Ranges

• pH: –2 to 16 (or 0–14 with option)
• ORP: –1500 to +1500 mV
• Conductivity: supports cell constants 0.005 to 50 cm
¹, cable length up to 60m
• Inductive conductivity: up to 2000 mS/cm
• Dissolved Oxygen: 0–50 mg/L for galvanic sensor, 0–50 μA input (depending on type)

Temperature Compensation

Supports various temperature elements (Pt100, NTC, etc.)


4. Advantages & Use Cases

Advantages:

  • Reliability: With dual sensors, you get redundancy to avoid downtime.
  • Maintenance Efficiency: Built-in diagnostics and calibration memory can reduce OPEX (operational cost).
  • Flexibility: The modular design makes it easy to adapt to different measurement needs / parameters.
  • Communication: Digital (HART) ensures better integration and remote diagnostics.

Typical Use Cases:

  • Process control in water & wastewater treatment
  • pH / ORP monitoring in chemical and petrochemical plants
  • Conductivity measurement in industrial processes (including pure water, boiler water)
  • Dissolved oxygen monitoring in bioreactors or water treatment plants

 

5. Limitations / Considerations

  • Requires two sensors of the same type for dual-channel functionality — you cannot mix different sensor types.
  • As a 2-wire device, the power supply is limited to 24 VDC loop, which may impose constraints in some installations.
  • While self-diagnosis is helpful, some calibration and maintenance are still needed periodically.

 

6. Summary

The Yokogawa FLXA21 is a robust, modular, and redundant-capable 2-wire liquid analyzer. It’s well-suited for industrial environments where reliability, diagnostics, and long-term maintenance savings are important. It supports a broad range of sensor types (pH/ORP, conductivity, DO), and its self-diagnostics and dual-sensor capability make it a strong choice for critical process measurement applications.

 

Company Details

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 from Quality China Factory
  • Business Type:

    Manufacturer

  • Year Established:

    2003

  • Total Annual:

    3000000-5000000

  • Employee Number:

    101~200

  • Ecer Certification:

    Verified Supplier

Xi'an Xiyi Central Control Technology Co., Ltd. is an enterprise engaged in the production, sales and R & D of industrial automation instruments. The company is located in the ancient city of Xi'an, a prosperous international city in China. The company is mainly engaged in Rosemount a... Xi'an Xiyi Central Control Technology Co., Ltd. is an enterprise engaged in the production, sales and R & D of industrial automation instruments. The company is located in the ancient city of Xi'an, a prosperous international city in China. The company is mainly engaged in Rosemount a...

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Get in touch with us

  • Reach Us
  • Xi'an Xiyi Central Control Technology Co., Ltd.
  • Room 2204, Unit 1, No. 91, Taoyuan South Road, Xi'an, Shaanxi, China
  • https://www.industrial-pressuretransmitters.com/

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