FJA-6 ORP Depolarization Method Automatic Measuring System

Product Introduction

The FJA-6 ORP Depolarization Method Automatic Measuring System is designed for measuring oxidation-reduction potential (ORP or Eh) in environmental media such as soil, natural water, and laboratory samples.

Conventional ORP measurement with a platinum electrode can be slow, particularly in weakly balanced redox systems. Surface oxide films or adsorbed substances may affect electron exchange at the electrode, delaying the establishment of a stable potential and introducing measurement errors.

The FJA-6 uses a positive and negative polarization depolarization method to evaluate redox potential while accounting for electrode surface behavior. According to the manufacturer, it can complete a measurement in as little as 2 minutes, with measurement accuracy better than 10 mV.

The system supports ORP, pH, and temperature measurement. It can operate independently in the field or connect to a PC through USB for automatic measurement control, data processing, curve generation, and result storage.

Performance Features

• Depolarization measurement technology: Uses positive and negative polarization instead of conventional direct platinum electrode measurement.

• Fast measurement: Completes a measurement in as little as 2 minutes, according to the supplied specifications.

• Improved measurement reliability: Designed to reduce errors associated with platinum electrode surface conditions and slow potential stabilization.

• Multi-parameter measurement: Supports ORP, pH, and temperature measurement, with simultaneous measurement of all three parameters when connected to a PC.

•  Automatic measurement control: Automatically manages the measurement process and data processing.

• Temperature compensation: Determines the reference electrode potential automatically using a temperature-based lookup table.

• USB PC connectivity: Connects to a computer or laptop for software-controlled operation.

• Automatic data management: Generates measurement curves and saves results through the PC application.

•  Flexible measurement modes: Supports individual measurements and cyclic data collection.

• Portable power supply: Operates with an 8.4 V lithium battery for independent field use.

Working Principle

The FJA-6 uses a depolarization method based on positive and negative electrode polarization to determine redox potential.

In conventional ORP measurement, a platinum indicator electrode and a reference electrode are immersed directly in the sample. In weakly balanced systems, surface oxide films or adsorbed substances on the platinum electrode can slow electron exchange between redox couples and the electrode. This may result in long stabilization times and measurement deviations.

The FJA-6 addresses this challenge by applying controlled positive and negative polarization and monitoring the electrode response during depolarization. Its measurement process is designed to account for electrode surface dynamics and determine the final redox potential more efficiently.

The system also measures temperature and uses a lookup table to compensate for the reference electrode potential. When connected to a PC, the software automatically controls measurement, processes data, generates curves, and stores results.

Technical Parameters

Application Scenarios

The FJA-6 is suitable for redox potential measurement in environmental, agricultural, and laboratory applications, including:

•  Soil redox potential analysis: Evaluating oxidation-reduction conditions in agricultural soils, wetlands, and research plots.

• Natural water monitoring: Measuring redox conditions in rivers, lakes, groundwater, and other natural water environments.

• Environmental research: Studying oxidation-reduction processes in soil, water, and other environmental media.

• Laboratory electrochemistry: Measuring Eh in samples where electrode surface effects may influence conventional ORP measurements.

•  Water treatment research: Monitoring redox conditions in water treatment and related experimental processes.

•  Field measurements: Performing portable ORP measurements using the built-in lithium battery.

Comparison:

FJA-6 Depolarization Method vs. Conventional Platinum Electrode ORP Measurement

Frequently Asked Questions

1. What is the FJA-6 ORP depolarization method measuring system used for?

The FJA-6 measures oxidation-reduction potential (ORP or Eh) in environmental media such as soil, natural water, and laboratory samples. It is designed for applications where conventional platinum electrode measurements may take a long time to stabilize.

2. What is the difference between the FJA-6 and a conventional ORP meter?

Conventional ORP meters generally measure the potential between a platinum electrode and a reference electrode directly. The FJA-6 uses controlled positive and negative polarization followed by depolarization to determine redox potential.

3. How long does one measurement take?

The minimum measurement time specified by the manufacturer is 2 minutes.

4. What is the ORP measurement range?

The specified range is 0 to ±1999.9 mV, with a minimum reading of 0.1 mV.

5. What measurement accuracy does the FJA-6 provide?

The stated ORP measurement accuracy is less than 10 mV.

6. Can the FJA-6 measure pH and temperature?

Yes. The system supports ORP, pH, and temperature measurement. Simultaneous measurement of all three parameters is available when connected to a PC.

7. Can the FJA-6 be used outdoors?

Yes. It can operate independently in the field and uses an 8.4 V lithium battery. It can also connect to a PC or laptop through USB.

8. Does the FJA-6 support automatic data recording?

Yes. When used with PC software, the system can automatically control measurements, process data, generate curves, and save results. Users can select single-measurement or cyclic data collection modes.