EN
GDZL-503 Fully Automatic Surface & Interfacial Tension Tester
GDZL-503 Digital Intelligent Fully Automatic Surface and Interfacial Tension Tester with Platinum Ring Technology, Electromagnetic Balance Sensor, Automatic Temperature Compensation, for Petroleum Products Tension Measurement.
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDZL-503 is a professional-grade, high-precision fully automatic surface and interfacial tension testerexclusively designed for aging degree assessment of insulating oils, lubricating oils, fuel oils and other petroleum products in power systems and petrochemical industries. It fully complies with GB/T 6541-1986, ASTM D971-2023 and ISO 1409:2004 standards, adopting the internationally recognized platinum ring method that provides accurate and reliable measurement results.
The instrument features an innovative high-precision electromagnetic balance sensor that ensures stable and accurate force measurement, with single-point calibration guaranteeing full-range accuracy. Its ARM microprocessor control system enables fully automatic operation, completing the entire test process including platform lifting, force detection, result calculation and report printing without manual intervention. The built-in temperature sensor automatically compensates test results according to ambient temperature, eliminating the need for manual correction.
Specifications
| Parameter | Specification |
|---|---|
| System Parameters | |
| Compliance Standard | GB/T 6541-1986, ASTM D971-2023, ISO 1409:2004, DL/T 429.12-2016 |
| Test Principle | Platinum ring method (du Noüy ring method) |
| Sensor Type | High-precision electromagnetic balance sensor |
| Operation Mode | Fully automatic one-click test |
| Display | 4.3-inch 480×272 color touch screen |
| Data Storage | 255 groups test results |
| Data Export | USB 2.0, RS232 |
| Printer | High-speed thermal printer, 58mm paper width |
| Test Parameters | |
| Measurement Range | 0 ~ 200mN/m |
| Accuracy | ±(0.1% of reading + 0.1mN/m) |
| Resolution | 0.1mN/m |
| Sensitivity | 0.1mN/m |
| Repeatability | ≤0.3mN/m |
| Test Time | ~3~5 minutes per sample |
| Sample Consumption | ~20mL per test |
| Temperature Parameters | |
| Temperature Sensor | Built-in high-precision temperature sensor |
| Temperature Compensation | Automatic |
| Lifting System | |
| Lifting Motor | Precision stepper motor |
| Lifting Speed | 0.1~10mm/min adjustable |
| Lifting Stroke | 0~50mm |
| Power Supply | |
| Input Power | AC 220V±20%, 50Hz±10% |
| Power Consumption | ≤20W |
| Physical Parameters | |
| Dimensions | 200×300×330mm (L×W×H) |
| Weight | ~6kg (including all components) |
| Housing | Rugged engineering plastic |
| Protection Grade | IP40 |
| Operating Temperature | 10℃ ~ +30℃ |
| Storage Temperature | -20℃ ~ +60℃ |
| Humidity | ≤85% RH (non-condensing) |
Applications
Core Test Objects
- Power industry oils: Transformer oil, switch oil, capacitor oil, cable oil, turbine oil
- Petrochemical industry oils: Lubricating oil, hydraulic oil, gear oil, fuel oil, diesel oil
- Other liquids: Water, solvents, surfactants, cosmetics, pharmaceuticals
Typical Usage Scenarios
- Power companies: Transformer preventive maintenance, insulating oil regular testing, aging degree assessment
- Transformer manufacturers: Factory quality control, type tests, after-sales service
- Oil treatment companies: Insulating oil regeneration quality inspection, oil treatment effect evaluation
- Petrochemical enterprises: Product quality inspection, raw material testing, production process control
- Third-party testing institutions: Oil quality testing, performance assessment, quality arbitration
Advantages
Compliance with Latest International Standards
Fully meets GB/T 6541-1986 Chinese national standard, ASTM D971 American standard and ISO 1409 international standard → test results are recognized worldwide
Industry-Leading Electromagnetic Balance Sensor
High sensitivity, fast response, excellent linearity, no drift → ensures accurate and reliable measurement results
Single-Point Calibration Technology
Only one-point calibration required for full-range accuracy → simplifies calibration process and saves time
One-Click Fully Automatic Operation
Automatically completes all test steps including lifting, detection, calculation and printing → reduces operator skill requirements and eliminates human errors
Automatic Temperature Compensation
Built-in temperature sensor, automatically corrects test results → ensures consistent results in different temperature environments
Real-Time Tension Curve Display
Visualizes the entire test process, facilitates result analysis and troubleshooting → improves test reliability
FAQ
Q: What is the principle of platinum ring method for tension testing?
A: The principle is based on measuring the maximum force required to pull a horizontally suspended platinum ring from the liquid surface or interface. When the ring is lifted, a liquid film is formed between the ring and the liquid, creating a downward force proportional to the surface tension. The instrument measures this maximum force and applies the Harkins-Jordan correction factor to calculate the true surface or interfacial tension value. This method is the international standard for liquid tension measurement.
Q: How long does a typical test take?
A: A complete test including platform lifting, force detection, calculation and printing takes approximately 3~5 minutes depending on the sample type and tension value. For transformer oil tested at 25℃, the test time is about 3 minutes.
Q: How often does the instrument need to be calibrated?
A: The instrument uses a high-stability electromagnetic balance sensor that requires calibration only once every 6~12 months under normal use. Calibration can be easily performed using distilled water (surface tension = 71.97mN/m at 25℃) as the standard sample.
Q: Can it test both surface tension and interfacial tension?
A: Yes. GDZL-503 can measure both surface tension (liquid-gas interface) and interfacial tension (liquid-liquid interface, e.g., oil-water interface). For interfacial tension measurement, the user only needs to input the densities of the two liquids, and the instrument will automatically calculate the correct tension value.
