Introduction of Fully Automatic Petroleum Product Pour Point Tester
The DFYF-144Z fully automatic petroleum product pour point tester is designed and manufactured according to the national standard GB/T 3535 “Petroleum Product Pour Point Determination Method”. It should be noted that GB/T 3535 has been updated to the 2025 version (GB/T 3535-2025, published on October 5, 2025, effective from May 1, 2026), which adopts ISO 3016:2019 (Natural or synthetic petroleum and related products — Determination of pour point) as the revised international standard.-1 The tester is suitable for measuring the pour point of petroleum and petroleum products. In addition to GB/T 3535, the instrument also complies with ASTM D97 (Standard Test Method for Pour Point of Petroleum Products) and the industry standard JB/T 11944-2025 (Automatic Pour Point Tester — Technical Specification and Test Evaluation Method — Automatic Pneumatic Method), ensuring full compatibility with both domestic and international testing requirements.-30
Detection Principle Overview
The sample is preheated and then cooled at a specified rate. Every 3°C, the fluidity of the sample is inspected. The lowest temperature at which the sample can still flow is recorded as the pour point.-52 The entire process is fully automated, significantly reducing human error and improving test reproducibility.
Advantages of Fully Automatic Petroleum Product Pour Point Tester:
Full automation – Reduces manual intervention, improves testing efficiency and result accuracy. Once the sample is loaded, the entire process runs automatically without requiring operator supervision.
Advanced control system – Ensures precise measurement and reliable results. The instrument integrates cooling, heating, and pour point detection into one unit, controlled by a microcomputer.
Large touchscreen display – Features a 10-inch color LCD touchscreen with bilingual (Chinese/English) interface, clearly displaying temperature, time, and other real-time test parameters. Operation is intuitive and user-friendly.-52
High-quality materials and manufacturing – Ensures long service life and low failure rate. The instrument features an advanced well-type cold bath with low thermal hysteresis, fast cooling, and reduced sample waiting time.-52
Multiple protection circuits – Safeguards experimental safety and prevents unexpected incidents. The instrument includes automatic temperature control, over-temperature protection, and self-diagnostic functions.
Infrared photoelectric detection – Uses imported infrared detection technology to sense even the slightest changes in the liquid level, delivering high sensitivity and accurate endpoint determination.-52
Advanced refrigeration system – Adopts an imported cascade compressor refrigeration system for rapid cooling, with a minimum cooling temperature down to -70°C.-52
Automatic preheating function – Allows users to set preheating time and temperature as needed, offering flexibility for different sample types.-52
Data storage capability – Equipped with powerful data storage and query functions, capable of storing thousands of test results for easy review and traceability.
Parameters of Fully Automatic Petroleum Product Pour Point Tester:
| Parameter | Specification |
|---|---|
| Input power voltage | AC220V ± 10% 50Hz |
| Input power | 2000W (2.0 kW) |
| Temperature control range | -120°C to +50°C |
| Cold bath temperature range | 50 ~ -70°C |
| Cold bath temperature control accuracy | ±0.3°C |
| Display accuracy | ±0.1°C |
| Display method | 10-inch color LCD touchscreen |
| Refrigeration method | Compressor refrigeration |
| Detection method | Infrared photoelectric detection |
Application of Petroleum Product Tester:
This instrument is used for measuring the pour point of various petroleum products, including but not limited to:
Fuel oils – Diesel, heavy fuel oil, jet fuel, etc. — pour point testing ensures reliable flow performance in cold climates and prevents fuel line clogging.
Heavy lubricating oil base oils – Essential for assessing low-temperature fluidity of base stocks used in engine oils and industrial lubricants.
Products containing residual fuel components – Suitable for testing complex formulations that include residual fuel fractions, as described in GB/T 3535-2025.-Transformer oil, hydraulic oil, and other industrial oils – Widely used in electric power, railway transportation, and heavy machinery sectors.-52
Light oils and chemical raw materials – Also applicable for testing the low-temperature flow properties of various light petroleum fractions.
The pour point is a critical quality parameter for assessing the low-temperature performance of petroleum products. It helps enterprises prevent equipment failure caused by wax crystallization or solidification in cold environments, optimize production processes, and ensure product compliance with seasonal and regional specifications.
About us
Dalian Analytical Instrument Factory passed the ISO9001 (2000) quality management system certification in 2002. We have reliable quality assurance in all aspects of design, production and service of petroleum (such as gasoline, kerosene, diesel, lubricating oil, etc.) high and low temperature instruments and laboratory general thermostatic instruments.
