— High-Precision Potentiometric Titration for Accurate Determination of Acid Number in Petroleum Products
Product Overview
The DFYF-175Z Automatic Acid Number Tester adopts the potentiometric titration method and is specifically designed for automatic determination of acid number in crude oil, lubricating oil, fuel oil, transformer oil, and other petroleum products. The instrument complies with standards such as GB/T 18609, GB/T 7304, and GB/T 264, and is widely used in oil refineries, power systems, inspection and certification bodies, third-party testing laboratories, and research institutions.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Power Supply | AC220V, 50 Hz |
| Measuring Range | ≥0.001 mgKOH/g |
| Potential Measurement Range | –2000.0 mV to +2000.0 mV |
| Basic Error of Electronic Unit | ±0.1% F·S ±0.1 mV |
| Input Impedance | ≥1×10¹² Ω |
| Burette Volume | 10 mL |
| Minimum Titration Volume (Min. Dosing) | 0.001 mL |
| Burette Accuracy | ±0.1% F·S |
| Precision | Meets or exceeds requirements of GB/T 18609 |
| Ambient Temperature | 0–35°C |
Performance Features
✅ Wide Compliance with Standards
Fully conforms to GB/T 18609, GB/T 7304, GB/T 264, and other domestic and international standard methods for acid number determination, ensuring authoritative and traceable results.
✅ High-Precision Potential Measurement System
Potential measurement range from –2000.0 mV to +2000.0 mV, with an electronic unit error of only ±0.1% F·S ±0.1 mV.
Input impedance as high as ≥1×10¹² Ω ensures stable acquisition of weak signals, especially suitable for samples with a distinct titration jump (breakthrough point).
✅ Accurate and Reliable Titration System
Adopts a 10 mL high-precision burette with a minimum titration volume of 0.001 mL.
Burette accuracy: ±0.1% F·S, guaranteeing accurate titrant delivery from the source.
Equipped with an imported anti-diffusion titration tip to prevent backflow and diffusion of titrant, resulting in sharper endpoint detection.
✅ Intelligent Automatic Titration Functions
Automatic cleaning of titration lines.
Automatic fixed-volume liquid addition.
Features a resume titration function allowing continuation of an experiment after an unexpected interruption.
Fully automated titration process reduces manual errors.
✅ Windows-Based Operating Platform for Friendly Human-Machine Interaction
Developed on the Windows system with an intuitive interface.
Guided, dialog‑based operation – easy to learn without extensive training.
Test data and final analysis reports can be printed with one click for convenient archiving.
Outstanding Advantages Compared to Similar Products
| Comparison Item | Ordinary Acid Number Titrators | DFYF-175Z |
|---|---|---|
| Measuring Range | Typically from 0.01 mgKOH/g | ≥0.001 mgKOH/g, lower detection limit |
| Potential Measurement Accuracy | ±1 mV or higher | ±0.1 mV, more accurate jump capture |
| Input Impedance | 10¹⁰–10¹¹ Ω | ≥10¹² Ω, less signal attenuation |
| Minimum Titration Volume | 0.01–0.02 mL | 0.001 mL, finer micro-titration |
| Titration Tip | Ordinary stainless steel or PTFE | Imported anti‑diffusion tip, prevents backflow |
| Operating System | Microcontroller / digital display | Windows platform – data storage, LIMS connection |
| Resume Titration Function | No | Yes, improves experiment fault tolerance |
| Applicable Standards | Single standard | Simultaneously complies with GB/T 18609, 7304, 264 |
Furthermore, the DFYF-175Z performs exceptionally well for low‑acid‑number samples (e.g., transformer oil, light oil). Its detection limit of 0.001 mgKOH/g is superior to most competing products in the same price range, making it especially suitable for high‑standard testing of export‑grade oil products.
Company Strengths
Professional Manufacturing Background: Dalian Analytical Instrument Factory – Decades of experience in R&D of petroleum analysis instruments. Products are widely used in major petrochemical, power, military, and third‑party laboratories across China, and exported to Southeast Asia, the Middle East, Russia, and other markets.
Quality System: Strict implementation of ISO quality management processes. Each instrument is subject to potential calibration and titration verification before delivery.
After‑Sales Support: Provides installation and commissioning videos, remote technical support. One‑year whole‑unit warranty, lifetime paid maintenance.
Customization Services: RS232/RS485 communication interfaces, LIMS integration, multi‑language interfaces (English, Russian, etc.) available upon request.
Application Examples
Determination of total acid number in crude and heavy oils.
Monitoring of aging condition of in‑service lubricating oils.
Regular acid number testing of transformer oils and turbine oils.
Acid number analysis of biodiesel and additives.
Acid number tracking in research on oxidation stability of oil products.
Ordering Information
Product Model: DFYF-175Z Automatic Acid Number Tester (Potentiometric Titration Method)
Standard Package: Main unit, titration assembly, imported anti‑diffusion titration tip, electrode, supporting software, operation manual, calibration report.
For quotes, technical proposals, or product demonstration videos, please contact us.