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SUPEC 5500

Analysis methods

Potentiometric titration

Photometric titration

Direct potential

Colorimetric method


SUPEC 5500 online titration analysis system of EXPEC Technology, including the three specifications of single-factor photometric titration, single-factor potentiometric titration and double-factor titration, has the functions of automatic sampling, automatic filtering, automatic dilution, automatic titration analysis, automatic cleaning and waste discharge, capable of realizing pH, ORP and complexometric titration. Besides, the system can continuously obtain the key parameter information in various industrial manufacturing processes for 7 days * 24 hours, thus suitable for the substance concentration analysis in various industries such as petrochemical, chemical, metallurgical, industrial water, food, semiconductor, pharmaceutical, papermaking, etc.

Full process automation

  • The system realizes the full-process automation, such as automatic sampling, titrimetric analysis, cleaning and waste discharge, and uploading analysis results.
  • The time for single process is less than 15min.
  • Unmanned operation is realized.

Circulating flow path sampling

  • Peristaltic pump circulation flow control ensures the sample representativeness.
  • The prefiltration of filter element ensures the stable operation of the instrument and reduces the risk of component damage.

Accurate analysis

  • An injection pump at 1/20000 precision is adopted.
  • A high-precision sensor is equipped, with the analysis results reaching the ppm level.
  • Indication error ≤ 2%, RSD ≤ 1%

Multiple sample flows + multiple analysis methods

  • A system can support the sampling at up to 4 sites.
  • Support the four analysis methods, including photometric titration, colorimetry, potentiometric titration and direct potentiometric analysis.
  • Realize the parallel analysis of different flow paths and methods.

Reliable data

  • Flexible setting of cleaning times can reduce the cross contamination of pipelines and titration cups.
  • No man-made operation error.
  • The quality control sample can be regularly checked, calibrated and verified.

Anticorrosive cavity

  • Adopt the micro-positive pressure sealing cavity
  • The stainless steel is provided with a plastic-sprayed surface.
  • Full PTFE pipeline design
  • IP65 protection is provided to cope with the harsh corrosive environments on site under the working conditions.

Core algorithm

  • The contactless photometric sensor adopts a simulated human eye recognition algorithm.
  • The balanced time control algorithm
  • The automatic temperature compensation
  • Dynamic equivalence point titration (DET),
    monotonic equivalence point titration (MET), and set titration

System operation and maintenance

  • Low operating cost
  • Maintenance cycle of 7 days
  • The titration cup component is easy to disassemble and replace.

The online titration analysis system can collect samples online during the production process, with a single system supporting 1-4 sampling points within 20m. Depending on the field working conditions, the single or multiple systems can be selected to achieve the full coverage of industrial field testing sites. Besides, the DCS/LIMS system can be connected to achieve the efficient and convenient intelligent management.

Product principles

Photometric method

Photometric titration is based on the selective absorption of light by substances (Lambert-Beer law), using a contactless photometric sensor with wavelength adjustable to achieve the concentration determination of different substances.

Potentiometric method

Potentiometric titration is based on the selective response of electrode-collected voltage to concentration (Nernst equation), and adopts the different types of electrodes to determine the concentration of different substances.

Analysis methods

Potentiometric titration

The determined ion concentration undergoes a sudden change near the stoichiometric point, and the results are accurate and reliable without the need for calibration.

Photometric titration

The point at which the color changes initially, i.e. the inflection point of the titration curve, can be used to titrate the test solution with a color change at the end point.

Direct potential

It is to find the concentration on the
standard curve according to the potential
value of the component solution to be tested.
Thus, this method has a fast analysis speed and
a wide measurement range.

Colorimetric method

It is to find the concentration from the standard curve according to the absorbance of the component solution to be determined, which is simple, rapid and suitable for the analysis of a large number of samples.

The four detection methods should be determined based on actual detection requirements, and the following table is not exhaustive.


Potentiometric titration



Direct potential



































Total rare earth






Hydrofluoric acid




Hardness (calcium magnesium)








Software features

More convenient: The on-site operation of touch screen terminals, and the remote control and upgrade of central control platform software
More functions: Online monitoring, method configuration, permission grading, data query, and status indication
More flexible: Open interaction, so that the users can customize and edit the parameters as required.
More reliable: Data backup, data traceability, and audit tracking
More user-friendly: Graphical interaction, with multilingual version and user-friendly interface design, so that it is easy to operate.

Online monitoring

Capable of monitoring the system operation status, sample concentration, liquid level of various reagents, instrument temperature and pressure, and issuing the alarm messages in time.

User-defined input configurations and methods

It is flexible to set and save the titration parameters, analysis methods, calculation formulas, cleaning times, calibration frequency, dynamic equivalence point titration, monotonic equivalence point titration, etc.

Searchable historical data

The historical data, operation logs, alarm information, calibration information, quality control records, etc. can be queried and exported.


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