Interfacial Tension Analyzer
The ZWZL300 is an automatic ring-method analyzer for measuring surface tension and oil-water interfacial tension from 2 to 200 mN/m.
Designed according to GB 6541-86, it combines automatic balancing, touchscreen operation, result calculation, and data recording for reliable laboratory testing.
Product Overview
The ZWZL300 Interfacial Tension Analyzer measures the surface tension of liquid-gas interfaces and the interfacial tension between mineral oil and water. Based on the platinum ring method specified in GB 6541-86, it uses an automatic high-frequency induction micro-displacement balance system to determine the force acting on the platinum ring and calculate the final result.
With automatic sample positioning, calibration, calculation, historical data storage, and optional printing, the analyzer helps improve testing consistency and reduce manual measurement errors. It is suitable for transformer oil laboratories, petroleum testing facilities, power utilities, and research institutions.
Functions and Value:
-
Automatic Ring Measurement: The instrument automatically detects the force acting on the platinum ring and calculates the surface or interfacial tension, reducing manual reading and operator influence.
-
Oil-Water Interfacial Testing: Measures the interfacial tension of mineral oil and water, supporting the evaluation of insulating oil condition and petroleum product quality.
-
Surface Tension Analysis: Supports liquid-gas surface tension measurement for laboratory analysis of various liquid samples.
-
High-Precision Balance System: The differential transformer and eddy-current displacement probes provide automatic balance measurement for stable and repeatable results.
-
Automatic Sample Positioning: The motorized sample plate moves automatically during calibration and testing, helping maintain a consistent measurement position.
-
Pure Water Calibration: A dedicated pure water calibration procedure allows users to verify instrument performance before sample testing. The reference value is 71–72 mN/m according to GB 6541-86.
-
Touchscreen Operation: The color touchscreen provides menu-guided operation for weight calibration, parameter setting, pure water calibration, sample testing, and historical record management.
-
Automatic Temperature Compensation: Users can enter the working temperature and sample densities so the instrument can apply the required calculation and temperature compensation parameters.
-
Historical Data Storage: Test results are automatically saved and can be reviewed, deleted, printed, or uploaded to a computer for laboratory record management.
Technical Details
| Parameter | Specification |
|---|---|
| Test Method | Platinum Ring Method |
| Measurement Range | 2 to 200 mN/m |
| Sensitivity | 0.1 mN/m |
| Accuracy | 0.1 mN/m |
| Resolution | 0.1 mN/m |
| Applicable Temperature | 10°C to 30°C |
| Recommended Temperature | 25°C |
| Ambient Humidity | 20% to 75% RH |
| Power Supply | AC 220 V ±5%, 50 Hz |
| Power Consumption | 20 VA |
| Dimensions | 185 × 260 × 360 mm |
| Weight | 15 kg |
Model Selection Guide
| Item NO. | Max Current | Measuring Range | Main Features | Recommended Application |
|---|---|---|---|---|
| GDZR-10A | 10A | 100μΩ - 20KΩ | Portable, built-in discharge alarm | Small to medium distribution transformers |
| GDZR-20A | 20A | 10μΩ - 10KΩ | High-speed testing, heat dissipation | Medium-sized power transformers |
| GDZR-40A | 40A | 1μΩ - 2KΩ | Dual-channel measurement, high current | Large-scale power transformers |
| GDZR-40A | Three-Phase 10A | 100μΩ - 10KΩ | Three-phase simultaneous measurement | Yn-type transformers, time-saving |
Recent Work
Parts List
| Item NO. | Max Current | Measuring Range | Main Features | Recommended Application |
|---|---|---|---|---|
| GDZR-10A | 10A | 100μΩ - 20KΩ | Portable, built-in discharge alarm | Small to medium distribution transformers |
| GDZR-20A | 20A | 10μΩ - 10KΩ | High-speed testing, heat dissipation | Medium-sized power transformers |
| GDZR-40A | 40A | 1μΩ - 2KΩ | Dual-channel measurement, high current | Large-scale power transformers |
| GDZR-40A | Three-Phase 10A | 100μΩ - 10KΩ | Three-phase simultaneous measurement | Yn-type transformers, time-saving |
Product Video
Discover how the ZWJD111E BDV Tester simplifies insulating oil diagnostics.
Certificate
Frequently Asked Questions
Contact our engineers for technical support and application guidance.
It measures liquid-gas surface tension and the interfacial tension between mineral oil and water.
The analyzer uses the platinum ring method according to GB 6541-86 for oil-water interfacial tension measurement.
The measurement range is 2 to 200 mN/m, with a sensitivity, accuracy, and resolution of 0.1 mN/m.
Pure water calibration is recommended before sample testing. According to GB 6541-86, the pure water reference value should be approximately 71–72 mN/m.
Related Products
