2-Wire Transmitter/Analyzer FLXA202

The FLEXA™ series analyzers are modular-designed analyzers used for continuous online measurements in industrial installations. They offer single or dual sensor measurement, making them the most flexible 2-wire analyzer available.

With the FLXA202, there is no need for multiple analyzers, since it is easily scalable at the site location by swapping the internal measurement module to what is needed, giving you more flexibility and optimizing your OPEX.

Details

Main Features

Support of Up to Two Sensors

FLXA202Through the installation of up to two sensors, FLXA202 realizes interruption-free measurement even during maintenance. For dual sensor measurement, the sensor modules must be the same parameter – pH/ORP and pH/ORP, SC and SC, and DO and DO. Dual sensor measurement offers additional functionalities including a variety of calculated data from the two measuring parameters, as well as, the option to program the analyzer as a redundant system.

Advanced Functions

With the FLXA202, one analyzer can accept any of four types of measurements: pH/ORP, Contacting Conductivity (SC), Inductive Conductivity (ISC) and Dissolved Oxygen (DO)Sensors with self-diagnostics capabilities. Additional functions include:

  • Continuous measurement of sensor impedance, asymmetric potential, and slope, and continuous monitoring for electrode contamination/damage, burnout, and decline in measurement liquid level (ex. pH Analyzer).
  • Online Sensor Wellness checking for predictive maintenance.

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 12 languages. A quick setup menu for immediate measurement and a display of sensor status and estimated maintenance time improve efficiency. The interactive screen is housed in a robust aluminum die-cast housing (FLXA202).

Modular Design for Increased Scalability

The FLEXA™ series analyzer features a modular design with replaceable sensor modules, enabling the construction of a variety of systems. Users can opt to do without a display and can also select the case material (plastic or stainless steel).

 

Common Specification

Area Classification General Purpose
Class I Div II (without the use of IS Barrier)
Class I Div I (with the use of IS Barrier)
Enclosure Material Aluminum alloy die cast with epoxy coating (Standard offering
Aluminum alloy die cast with urethane or high anti-corrosion coating (available upon request)
Housing Rating IP66 (except Canada), Type 4X (except Canada), Type 3S/4X (Canada)
Power Supply 2-wire 24VDC Loop Powered
Output Signal Bi-directional HART digital communication, superimposed on mA (4-20mA) signal
Intrinsically safe type ATEX, IECEx, FM, CSA and NEPSI, and nonincendive of FM and CSA

Benefits of pH / ORP Measurement

Achieves high-precision pH measurement

  • Built-in calibration standard table with temperature compensation function and stability check function.
  • The detector status is checked and monitored in real time.
  • Temperature and oxidation-reduction potential (ORP) can also be measured.

Reduced maintenance man-hours by checking health level and predicting maintenance timing

  • Continuously measures the impedance, asymmetric potential, slope, etc. of the detector to continuously self-diagnose the status of the detector, such as contamination/damage, disconnection of the electrode, lowering of the measuring liquid level, etc.
  • Save the latest five calibration results to predict the health of the detector and future maintenance and calibration timing.

Compatible with various other types of explosion-proof

 

pH / ORP Measurement Specification

Input Range pH: -2 to 16 pH (with option /K: 0 to 14 pH) 
ORP: -1500 to 1500 mV 
rH: 0 to 100 rH 
Temperature: Pt1000, Pt100, 6.8k, PTC10k, 3k Balco, PTC500: -30 to 140 ºC, NTC 8k55: -10 to 120 ºC
Performance
(The specifications are expressed with simulated inputs.)
pH Linearity: ±0.01 pH, Repeatability: ±0.01 pH, Accuracy: ±0.01 pH
ORP Linearity: ±1 mV, Repeatability: ±1 mV, Accuracy: ±1 mV
Temperature with Pt1000, PTC500, 6.8k, PTC10k, NTC 8k55, 3k Balco
Linearity: ±0.3 ºC, Repeatability: ±0.1 ºC, Accuracy: ±0.3 ºC
with Pt100
Linearity: ±0.4 ºC, Repeatability: ±0.1 ºC, Accuracy: ±0.4 ºC

 

Sensors to combine

Analog Sensors

The analog detector connects directly to the FLXA202 module.

Please confirm the details of each detector from the following.
→ pH sensors/ORP sensors

Analog Sensors FU20

SENCOM smart adapter SA11 compatible sensor

When used as a digital compatible sensor, it is used in combination with the SA11 SENCOM  smart adapter.

Applicable to the following detectors with Variopin connector option.
→ All-in-One pH/ORP (REDOX) Sensor FU20  and FU24
→ Wide Body Sensor for Water and Wastewater PH21
→ pH/ORP Sensors PH8EFP/PH8ERP
→ Pure Water pH and ORP Sensors PH8EHP

SENCOM smart adapter SA11 compatible sensor

 

Benefits of Conductivity / Resistivity Measurement

Realizes highly versatile and high-precision measurement

  • The built-in temperature compensation function and calibration standard table enable higher-precision conductivity measurement by monitoring the contamination of the cell.
  • Cell constants correspond to 0.005 to 50 cm-1.
  • Both 2-electrode and 4-electrode sensors can be used.
  • Five types of temperature detectors are supported, and accurate temperature compensation (linear temperature compensation/matrix temperature compensation) is performed.

Pure water and compliance with stringent standards for WFI monitoring (USP item <645>)

  • In the analysis of demineralized water, steam, condensate, and boiler water, pure water compensation is performed.
  • Monitors the quality of the process solution in accordance with the USP (U.S. PHARMACEUTICAL) entry <645> (see Section 645 of USP23) guideline (U.S. PHARMACEUTICAL GUIDE), which serves as the basis for monitoring pure water in the PHARMACEUTICAL INDUSTRY.

Compatible with various other types of explosion-proof

 

Conductivity / Resistivity Measurement Specification

Input Specification Two or four electrodes measurement with square wave excitation, using max 60m (200ft) cable (WU40/WF10) and cell constants from 0.005 to 50.0 cm-1
Display range Conductivity min. 0.01 µS/cm, max. 2000 mS/cm (max 90% zero suppression)
Resistivity min. 0.001 kΩ x cm, max. 1000 MΩ x cm (max 90% zero suppression)
Temperature min. span 25 ºC, max. span 270 ºC
Performance
(Accuracy)(The specifications are expressed with simulated inputs.)
Conductivity 2 µS x K cm-1 to 200 mS x K cm-1: Accuracy: ±0.5%F.S.
1 µS x K cm-1 to 2 µS x K cm-1: Accuracy: ±1%F.S.
Resistivity 0.005kΩ / K cm-1 to 0.5MΩ /K cm-1: Accuracy: ±0.5%F.S.
0.5MΩ / K cm-1 to 1MΩ /K cm-1: Accuracy: ±1%F.S.
Temperature with Pt1000, Pb36, Ni100:  Accuracy: ±0.3 ºC
with Pt100, NTC 8k55:  Accuracy: ±0.4 ºC
Temperature compensation NaCl table: ±1 %
Matrix: ±3 %
Temperature 90 % (< 2 decades) in 7 seconds

 

Sensors to combine

Analog Sensors

The analog detector connects directly to the FLXA202 module.

Please confirm the details of each detector from the following.
→ Conductivity Sensors

Analog Sensors

SENCOM smart adapter SA11 compatible sensor

When used as a digital compatible sensor, it is used in combination with the SA11 SENCOM  smart adapter.

Applicable to the following detectors with Variopin connector option.
→ Contacting Conductivity Sensors SC42/SC4A

YPA Sensors

 

Benefits of Inductive Conductivity Measurement

Strong acid and strong alkali are also measured, and high-precision measurement with confidence is available for a wide range of applications.

  • For non-contact measurement, it is subject to measurement from acid and alkaline solutions to salt-containing solutions.
  • It has a matrix compensation and output linearization function to accurately analyze solutions of strong acid and strong alkali.
  • Level monitoring in the chemical industry, food and chemical industries, plating and surface treatment industries, paper and pulp industries, etc. makes measurements of electromagnetic conductivity for a wide range of applications with high accuracy.

Output function

  • One 4-20 mA output for recording, display, and control.
  • Select the measurement parameter from Conductivity, Level or Temperature.
  • Only one sensor can be connected.

Compatible with various other types of explosion-proof

 

Inductive Conductivity Measurement Specification

Input Specification Compatible with the Yokogawa inductive conductivity ISC40 series with integrated temperature sensor: NTC30k or Pt1000.
Input Range Conductivity 0 to 2000 mS/cm at 25 ºC reference temperature.
Temperature -20 to 140 ºC
Cable length max. 60 meters total length of fixed sensor cable + WF10(J) extension cable.
Influence of cable can be adjusted by doing an AIR CAL with the cable connected to a dry cell.
Performance
(The specifications are expressed with simulated inputs.)
Conductivity Linearity: ±(0.4 %F.S. + 0.3 µS/cm)
Repeatability: ±(0.4 %F.S. + 0.3 µS/cm)
Temperature ±0.3 ºC
Step response 90 % (< 2 decades) in 8 seconds

 

Sensors to combine

Analog Sensors

The analog detector connects directly to the FLXA202 module.

Please confirm the details of each detector from the following.
→ Conductivity Sensors

Analog Sensors

Benefits of Dissolved Oxygen Measurement

Process Analyzer with High Functionality, High Reliability, and Reduced Maintenance
Can be used under severe environmental conditions and is ideal for on-site installation

  • Either galvanic or polarographic sensors can be used.
  • Indicated units are mg/L, ppm and % saturation.
  • Corrections are made for changes in atmospheric pressure, salinity, and temperature depending on altitude, etc., even in harsh environments.
  • High-precision measurement is possible.
  • One 4-20 mA output is provided for recording, display, and control.
  • Concentration, temperature or calculated values of the two detectors, plus the following output functions are also configurable:
    • Hold function: Hold the output signal to the last measured value or fixed value (hold).
    • Burnout function: Burn-up (22.0mA) or burn-down signal (3.6 mA) is output in case of failure.

Compatible with various other types of explosion-proof

 

Dissolved Oxygen Measurement Specification

Input Specification The FLXA202 accepts output from membrane covered Dissolved Oxygen sensors. These sensors can be Galvanic type, where the sensor generates its own driving voltage or Polarographic type, where the sensor uses external driving voltage from the converter.
The input range is 0 to 50 µA for Galvanic sensors and 0 to 1 µA for Polarographic sensors.
For temperature compensation, the FLXA202 accepts Pt1000 (DO30 sensor) and NTC22k elements (OXYFERM and OXYGOLD sensors).
Measurement Range DO Sensors Dissolved Oxygen: 0 to 50 mg/l (ppm)
Temperature: -20 to 150 ºC
DO30G Measurement range: 0 to 20 mg/l (ppm)
Temperature: 0 to 40 ºC
Performance
(Accuracy) (Performance in ppm mode)
Linearity ±0.05 ppm or ±0.8% F.S., whichever is greater
Repeatability ±0.05 ppm or ±0.8% F.S., whichever is greater
Accuracy ±0.05 ppm or ±0.8% F.S., whichever is greater
Temperature Linearity: ±0.3 ºC
Repeatability: ±0.1 ºC
Accuracy: ±0.3 ºC

 

Sensors to combine

Analog Sensors

The analog detector connects directly to the FLXA202 module.

Please confirm the details of each detector from the following.
→ Dissolved Oxygen Sensors

Analog Sensors

Resources

Overview:

One of the primary applications for high purity water is for boiler feed water. The measurement of pure water pH can be one of the quickest indicators of process contamination in the production or distribution of pure water. Effective chemical treatment of the feed water is vital in maintaining the useful operating life and minimizing maintenance costs of the boiler.

Industry:Power, Pharmaceutical, Common

Application Note
Overview:

Having too much oxygen in the process is not a problem for the biological system; however the cost for generating the oxygen is one of the largest expenses. By obtaining a good representative average of the dissolved oxygen present in the basin could save the plant large amounts of money. For this reason multiple measurements points are sometimes put into place.

Industries:
Overview:

The control of the world's water resource is arguably one of the most important issues. Water demand from industry and domestic users is set to rise throughout the industrialized world. Yokogawa has been applying minimized maintenance measurement systems.

Application Note
Overview:

For control of batch neutralization, a pH measurement coupled with a timer-controlled chemical feed scheme provides very satisfactory results.

This system can be adapted for either acid waste or alkaline waste neutralization.

Application Note
Overview:

Brewery is facility to produce beer. Breweries process is the manufacturing process of beer, which is a fermented beverage with low alcohol content made from various types of grain. Wheat, maize and other grains can be used for this. Brewing process starts from malted barley that is to form a mash by milling and mixing with hot water. The malt starches are converted to sugars during this process. This sugar rich water is then strained through the bottom of the mash and will be called as "wort". Then the wort will be brought to boil by bringing to the brew kettle. For bitterness or aroma hops are to be added at different times during the boil. Then the wort is cooled and aerated. And brewers yeast is added for fermentation. From the sweet wort the yeast produces carbon dioxide, alcohol and other byproducts. The GREEN BEER undergoes maturation after fermentation. Filtaration and carbonation are the last steps. Finally the beer will be stay in holding tank until it is bottled or kegged.

Industries:
Application Note
Overview:

The term "cooling tower" is used to describe both direct (open circuit) and indirect (closed circuit) heat rejection equipment. Cooling towers are heat-transfer units, used to remove heat from any water-cooled system. The cooled water is then re-circulated (and thus, recycled) back into the system. Since the process water is re-circulated, the mineral concentration increases as a result of the evaporation. (AN10B01B20-01E)

Industry:Refining, Food and Beverage, Power, Oil and Gas, Pulp and Paper, Chemical

Industries:
Overview:

There are a number of suppliers of oil and fat products used for edible purposes. These products include, but are not limited to olive oil, peanut oil, soybean oil, sunflower oil, lard, shortening, butter, and margarine. The raw materials for these products include animal by-products, fleshy fruits (palm and olive), and oilseeds. 

Industry:Food and Beverage

Overview:

For safe and efficient operation, the quality of feedwater, steam, and condensate in boiler plants must be controlled and maintained in the most favorable conditions.

Overview:

Caustic soda and hydrochloric acid, produced in electrolyzer plants, are fundamental materials used in varieties of industries; chemicals, pharmaceuticals, petrol-chemicals, pulp and papers, etc. Profit is the result of the effective production with minimized running / maintenance cost. Proper control of the process brings you stabilized quality of products with the vast operational profit.

Overview:

Process liquid analyzers such as pH meters, conductivity meters, ORP meters, and density meters play an important role at electrolysis plants in the control of concentrations of various process solutions. This requires both precision and stability under harsh conditions that include highly corrosive substances, high temperatures, and many impurities.

Overview:

Control of sodium chloride (NaCl) concentration at a salt dissolver where solid salt is dissolved in water, is highly important because of the electrolysis efficiency. A conventional way of measuring the concentration of supersaturated NaCl solution had been performed by using non-contact type sensors (e.g., γ-ray density meter) since NaCl, impurities, and precipitates are in the solution.

Overview:

In a semiconductor plant, a variety of chemicals are used in various manufacturing processes. The chemicals used for specific purposes are produced by diluting raw liquid with demineralized water using in diluting equipment, and the control of the concentration at this point is performed by conductivity measurement. 

Overview:

Problems at the wet end of a paper machine can rarely be corrected down stream. That is why monitoring and controlling pH in pulp stock is critical to the paper making process. Essentially, at every stage in the manufacture of paper, correct pH values play a vital role. Variations in the pH value at the head box have a negative effect on the quality of the paper produced.

Industries:
Overview:

In the manufacturing process of Pharmaceutical, Chemical and Food & Beverage industries, the cleaning and sterilization of tanks and piping are done with various cleaning solutions, fresh or hot water and steam after manufacturing products. Clean-In-Place (CIP) is the system designed for automatic cleaning and disinfecting.

Application Note
Overview:

Wastes have been considered to be a serious worldwide environmental problem in recent years. Because of increasing pollution, these wastes should be treated. However, industrial wastes can contain a number of valuable organic components. Recovery of these components is important economically. Using conventional distillation techniques, the separation of acetic acid and water is both impractical and uneconomical, because it often requires large number of trays and a high reflux ratio. In practice special techniques are used depending on the concentration of acetic acid. 

Industries:
Overview:

Cyanide-bearing wastewater from mining and electroplating facilities and certain types of chemical plants is toxic and must be treated by oxidation with chlorine or chloride to bring the cyanide concentration within regulatory limits.

Industry:Electrical and Electronics

Overview:

Continuous technology improvement is ongoing in the pulp & paper industry to obtain the best possible performance. Problems at the wet end (stock preparation) can rarely be corrected downstream. That is why monitoring and controlling pH in pulp stock is critical to the paper making process. Essentially, at every stage in the manufacture of paper, correct pH values play a vital role.

Overview:

Reverse osmosis (RO) is a separation process that uses pressure to force a solution through a membrane that retains the solute on one side and allows the pure solvent to pass to the other side. More formally, it is the process of forcing a solvent from a region of high solute concentration through a membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure.

Overview:

Continuous technology improvement is ongoing in the pulp & paper industry to obtain the best possible performance. The improved plant performance translates to the higher quality improvement and lower cost, and simultaneously environmental friendly plant operation.

Industries:
Overview:

Wastewater from electroplating facilities and certain types of chemical plants contains toxic forms of hexavalent chromium such as chromate and dichromate. The hexavalent chromium in this wastewater must be reduced before the water can be discharged. This requires a two-step process: hexavalent chromium (CR6) is reduced to trivalent chromium (CR3); and CR3 is precipitated as chromium hydroxide.

Industry:Electrical and Electronics

Overview:

Removal of free oil and grease from a wastewater stream reduces the potential for equipment problems to occur further downstream. There are three forms of oil encountered in wastewater treatment at a refinery. 

Industries:
Overview:

Sour Water is the wastewater that is produced from atmospheric and vacuum crude columns at refineries. Hydrogen sulfide and ammonia are typical components in sour water that need to be removed before the water can be reused elsewhere in the plant. Removal of these components is done by sending the sour water from the process to a stripping tower where heat, in the form of steam, is applied.

Overview:

Power plant boiler houses designed to burn coal or high sulfur oil are required by Federal and State pollution regulations to "scrub" (remove) sulfur dioxide from flue gasses to meet emission limits. SO2 in flue gasses is known to be harmful to the environment, as it is one contributor to the formation of acid rain. pH control is critical for the proper functioning of the scrubber system.

Industries:
Overview:

Seawater leak detection is the post-condensation water quality management processes. Damage to the ion exchange resin, which deionizes the supplied water, is also monitored during this process, and both of these applications are executed by a conductivity analyzer. (AN10D01P01-01E)

Overview:

In the past, the boiler feed tank systems in sugar factories had to be checked several times a day to make sure there were no sugar solution leaks. This was a very laborious process and, as continuous monitoring was not possible, monitoring results were not reliable. When a leak occurred, recovery operations were very costly and time-consuming. (AN10D01K01-02E)

Industries:
Application Note
Application Note
Overview:

In flue gas desulfurization systems that use magnesium hydroxide (Mg(OH)2) slurry, the consumption of the desulfurization agent (Mg(OH)2) is controlled by using online pH analyzers. A great concern in the pH measurement is heavy staining of the pH electrodes by the Mg(OH)2 slurry. To ensure accurate measurement, frequent cleaning of the electrodes with an acid is required, adding to both maintenance workload and cost.

Industry:Chemical, Power

Overview:

To defray energy costs, many industrial plants have their own boilers to generate steam in order to produce a portion of their energy needs. In addition to generating power, the steam may also be used directly in plant processes or indirectly via heat exchangers or steam jacketed vessels.

Application Note
Industries:
Application Note
Overview:

Fish perform all their bodily functions in water. Because fish are totally dependent upon water to breathe, feed and grow, excrete wastes, maintain a salt balance, and reproduce, understanding the physical and chemical qualities of water is critical to successful aquaculture. To a great extent water determines the success or failure of an aquaculture operation.

Overview:

In stable dispersion of fine particles is the pre-requisite for the selective flocculation technique involving separation of ultra-fine valuable particles from the gangue. Among mineral processing techniques selective flocculation technique is known to have outstanding potential of capturing the particles of particular mineral in slurry of mixed mineral system by selective adsorption of water soluble polymers known as flocculants.

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