Automatic Petroleum Acid Value Tester

The MOEORW-WEH08 automatic potentiometric titrator is designed for quantitative determination of total acid number (TAN) of petroleum-based samples. The device collects real-time electrode potential signals and titrant consumption data during titration, smooths titration curves and calibrates equivalence points via built-in algorithms to deliver stable, repeatable measurement outputs. Integrated automatic fluid delivery and cleaning modules reduce manual operation intervention, and the three-electrode high-impedance sensing system supports analysis of both light and dark oil samples without chemical indicators. The instrument adopts low-power single-chip microcomputer architecture and complies with domestic petroleum test standards, applicable to laboratory and industrial batch testing scenarios.

This tester operates on potentiometric titration methodology. The three-electrode assembly continuously captures potential variations as standard titrant is dispensed into the sample solution. The built-in microcontroller records electrode potential values and corresponding titrant volumes throughout the reaction process. Digital smoothing algorithms optimize raw titration curves, while equivalence point correction logic eliminates measurement deviations caused by complex petroleum matrixes. The system calculates the sample total acid number based on the standardized titrant volume consumed at the identified equivalence point.

Hardware & Technical Design
1.Low-power high-performance single-chip microcomputer control architecture, supporting stable long-term continuous operation.
2.Integrated automatic cleaning, automatic replenishment and fixed-volume liquid dispensing modules with integrated mechanical and electrical structure.
3.Dual high-impedance input circuit paired with three-electrode sensing system to stabilize electrode potential signals.
4.Multi-parameter editable setting and calibration modules for customized configuration for diverse sample matrices.
 

Performance Advantages
1.Three optional automatic equivalence point judgment modes, eliminating reliance on chemical indicators.
2.Built-in titration curve smoothing and endpoint correction algorithms to enhance result precision.
3.Internal data storage function for complete retention of full-process titration raw data for subsequent laboratory research.
 

Practical Application Value
1.Simplified parameter adjustment procedures cut down sample pre-analysis preparation time and shorten overall testing cycles.
2.Compatible with light-colored and dark-colored petroleum products without color interference limitations.
3.Complete traceable titration data records meet laboratory data archiving and audit requirements.

Applicable Test Samples
Lubricating oils, biodiesel, biodiesel blended fuels, crude oil and other petroleum derivatives.
 

Target Industry & Institution Users
Power generation industry, petroleum refining & chemical processing, commodity inspection authorities, universities and scientific research laboratories.
 

Compliant Test Standards
1.GB/T 7304-2014 Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration
2.GB/T 18609-2001 Standard Test Method for Acid Number of Crude Oil by Potentiometric Titration

Standard Delivered Accessories
1.Glass electrode
2.Calomel reference electrode
3.0.1 mol/L KOH-isopropanol standard titrant
4.Special titration solvent
5.Potassium hydrogen phthalate calibration solution
 

Daily Operation & Maintenance Requirements
1.Install the main unit on a flat, dust-free and clean horizontal workbench.
2.Avoid direct sunlight exposure and maintain stable ambient temperature to minimize measurement drift.
3.Secure all electrode connectors, signal interfaces and power cords before test startup to guarantee signal stability.
4.Seal titrant liquid containers tightly after testing to prevent reagent deterioration.
5.Conduct timely cleaning of electrodes and fluid pipelines upon completion of each testing batch.
6.All hardware malfunctions shall be inspected and repaired by professional technicians or factory service teams; unauthorized disassembly is prohibited to avoid irreversible equipment damage.