Yokogawa FLXA21 Series 2-wire Analyzer
Two detectors enable continuous measurement without interruption during maintenance
Reducing maintenance/instrumentation costs through HART communications
Backup system with two detectors for higher reliability measurements
pH/ORP, conductivity, and dissolved-oxygen detectors can be connected to two of the same type
Product information
The FLXA21 two-wire liquid analyzer can be connected to one or two sensors for measurement. The analyzer is modular in design and uses different sensor modules for four measurement purposes: pH/ORP(REDOX potential), contact conductivity (SC), inductive conductivity (ISC) or dissolved oxygen (DO).
The conductivity meter has the function of temperature compensation, and the built-in calibration buffer meter can monitor the battery fouling and improve the measurement accuracy of conductivity. High versatility, the battery constant range is 0.005 ~ 50cm-1, and, two and four electrode sensors can be used. In addition, five temperature sensors can be used to achieve precise temperature compensation.
It can provide ultra-pure water compensation for desalted water such as steam, condensate and boiler water. In ultra-pure water monitoring in the pharmaceutical -industry, FLXA21 monitors the water quality of process fluids according to water quality standards to comply with the USP(United States Pharmacopoeia)< 645> Chapter of the standards (see USP 23, 645).
For a wide range of applications in industrial environments, the FLXA21 conductivity meter is available in different housing options: plastic, stainless steel or stainless steel with a corrosion resistant coating
Peculiarity
--The two-wire double sensor measurement and analysis system can measure the single conductivity sensor or the double conductivity sensor system
--Dual sensor measurement data calculation
--Redundant measurement system with two sensors
--The touch screen design of the two-wire analyzer enhances operability
--Simple HMI menu structure that can display 12 languages
(English, German, Portuguese, Russian, Chinese, Korean, Japanese, French, Italian, Spanish, Czech and Polish)
--Quick setup menu for direct measurement
--Battery fouling monitoring, sensor status display
--HART® Communication.
--Housing can be plastic, stainless steel or stainless steel with corrosion resistant coating
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 | 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. |
Electromagnetic 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 | |
