Last Updates: 08/04/2021

Yokogawa FLXA402T Liquid Analyzer for Turbidity and Chlorine

The FLXA402T offers multiple connection possibilities, eliminating the need for multiple analyzers and providing greater flexibility. This four-wire analyzer includes a color HMI and an easy touchscreen operation with a simple menu structure in 8 languages for simple and efficient setup and configuration.

With its modular design, the FLXA402T analyzer offers a range of measurement choices with the respective sensor module, including turbidity, chlorine, pH, Conductivity, and 4-20mA input. Dual sensor measurements save your install space and offer additional functionalities, such as pH compensation for the Chlorine analyzer.

FLXA402T Features

Support up to 2 sensors

FLXA402T has a modular structure and can insert up to 2 sensor modules. You can choose the Turbidity module or Chlorine module as a 1st module, and Turbidity module, Chlorine module, pH module, or conductivity module is available as a 2nd module.

Expert Guide: Clear Touch Panel Display for Improved Operability

The FLEXA series analyzer provides improved operability with intuitive touchscreen operation, featuring a clear display and user-friendly indication with eight languages*. Sensor status and estimated maintenance time notification improve efficiency. The interactive screen is housed in a robust aluminum die-cast housing. ​​​

Advanced Flexibility: Modular Design for Increased Scalability

The FLEXA™ series analyzer features a modular design with replaceable sensor modules, enabling the construction of various of systems. FLXA402T allows for the connection of up to two possible sensors resulting in a reduction in CAPEX and OPEX.

Preparing for the Future

Industrial automation is moving toward SMART products, with sensors changing from analog to digital SMART. This transition can affect plant operations and take time to implement fully.

In addition to being a high-performance standalone analyzer, the FLXA402T is also a component of the Yokogawa SENCOM4.0 Platform, SMART sensor systems give you more insight because they possess in-depth knowledge of their health status for predictive asset management and sensor condition to ease troubleshooting.

With the SENCOM4.0 Platform, upgrading to the next generation SMART product is easy and can be done at any time with little impact on operations.

Data Mobility

SD card or Ethernet for easy data transfer and remote service, allowing for more in-depth process analysis. 


  • Turbidity of tap water, sewage, river water and water used in general processes
  • The Chlorine Analyzers intended for measurements in the water distribution network, at pumping stations, water delivery points, schools, and public facilities.

System Configuration

Turbidity and Chlorine 2 in 1 system configuration

The Chlorine sensor unit and the Turbidity sensor unit can be connected to one analyzer. In addition, in stead of the chlorine and turbidity sensors connection, you can connect Chlorine sensor unit, Turbidity detector, pH sensor or conductivity sensor in 2nd sensor module.


Brochure: Yokogawa FLXA402T Liquid Analyzer for Turbidity and Chlorine brochure

Manual: Yokogawa FLXA402T Liquid Analyzer for Turbidity and Chlorine manual

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