Platinum Ring Interfacial Tensiometer

Platinum Ring Interfacial Tensiometer

MT-IT407

The Automatic Interfacial Tensiometer is designed for precise determination of the surface tension and interfacial tension of liquids using the platinum ring method. Based on the classic Du Noüy platinum ring principle, the instrument measures the maximum force acting on the platinum ring as it is lifted through the liquid surface or liquid-liquid interface.

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interfacial tensiometer

Introduction

The platinum ring method has been widely used for more than 70 years due to its reliability and accuracy in measuring surface and interfacial tension. During testing, the platinum ring is immersed 2–3 mm below the liquid surface or interface and then slowly raised. The liquid film exerts a downward force on the ring, and the maximum force is converted into the true surface or interfacial tension value.

This Automatic Interfacial Tensiometer is suitable for petroleum products, transformer oils, lubricants, surfactants, latex, and other liquid samples. It is widely used in the petroleum, chemical, power, railway, and research industries.

The instrument features automatic measurement, temperature compensation, automatic lifting platform, data storage, and result printing, ensuring high accuracy, good repeatability, and convenient operation.

Typical Applications

The Interfacial Tensiometer is suitable for measuring:

  • Surface tension of liquids
  • Oil-water interfacial tension
  • Surface tension of surfactants
  • Surface tension of latex and rubber dispersions
  • Interfacial tension of lubricants and petroleum products

Typical tested samples include:

  • Transformer oil
  • Turbine oil
  • Lubricating oil
  • Hydraulic oil
  • Surfactants
  • Synthetic latex
  • Chemical solutions

Typical application environments include:

  • Petroleum refineries
  • Power plants
  • Chemical laboratories
  • Research institutes
  • Railway maintenance facilities
  • Rubber and latex manufacturers

Key Features

1. Platinum Ring Measurement Principle

The analyzer uses the platinum ring method to accurately determine liquid surface tension and oil-water interfacial tension.

2. Fully Automatic Measurement

The instrument adopts a microprocessor control system to automatically complete tension measurement, calculation, display, and printing.

3. 8-Inch Color Touchscreen

An 8-inch Chinese and English color touchscreen provides convenient operation and menu-guided settings.

4. Automatic Temperature Compensation

The instrument includes an automatic 25°C temperature compensation function, minimizing the effect of temperature changes on test results.

5. Automatic Lifting Platform

The lifting platform moves automatically with stable, low-noise operation and high positioning accuracy.

6. Automatic Lifting Platform

The lifting platform automatically raises and lowers with smooth movement, low noise, and high positioning accuracy.

7. Automatic Calibration and Self-Diagnosis

The analyzer performs automatic zero adjustment, fault diagnosis, and measurement correction.

8. Large Data Storage Capacity

Up to 300 historical records can be stored for convenient data retrieval.

9. High Repeatability Sensor System

A sealed magnetic sensor with multi-point calibration improves repeatability and reproducibility.

8. Corrosion-Resistant Structure

The housing adopts electrostatic spray coating for improved corrosion resistance and easy cleaning.

Technical Specifications

Name

MT-IT407 Automatic Interfacial Tension Meter

Display

8-inch Color Touchscreen (Chinese / English)

Measurement Principle

Platinum Ring Method

Platinum Ring Radius

R9.55 mm

Platinum Wire Radius

r0.3 mm

Measurement Range

2 – 400 mN/m

Sensitivity

0.1 mN/m

Accuracy

±0.1 mN/m

Temperature Range

-10°C – 100°C

Automatic Temperature Compensation

Yes

Self-Diagnosis Function

Automatic Fault Diagnosis

Power Consumption

< 40 W

Operating Environment

Temperature: 10-40°C

Relative Humidity: ≤85%

Power Supply

AC 220 V ±5%, 50 Hz

Dimensions

240 × 190 × 350 mm

Weight

Approx. 6 kg

Standards Compliance

This Automatic Interfacial Tensiometer complies with the following standards:

  • GB/T 6541 – Interfacial Tension of Oil Against Water by Ring Method
  • ISO 6295 – Petroleum Products and Mineral Oils – Determination of Interfacial Tension of Oil Against Water by Ring Method
  • GB/T 5549 / ISO 304 – Surface Tension Determination by Pulling Film Method
  • ISO 4311 – Anionic and Nonionic Surface Active Agents – Determination of Surface Tension by Ring Method
  • GB/T 22237 – Surface Active Agents – Determination of Surface Tension
  • SH/T 1156 – Determination of Surface Tension of Synthetic Latex
  • JB/T 9388 – Technical Specifications for Interfacial Tension Meters
  • ASTM D971 – Interfacial Tension of Oil Against Water by the Ring Method
  • ASTM D1331 – Surface and Interfacial Tension of Solutions of Surface-Active Agents
  • ASTM D1417 – Rubber Latex – Determination of Surface Tension

Why Choose Our Automatic Interfacial Tensiometer

Accurate Surface and Interfacial Tension Measurement

Provides reliable determination of liquid surface tension and oil-water interfacial tension.

Fully Automated Testing

Automatic zero adjustment, measurement, calculation, and printing reduce operator workload.

High Repeatability and Stability

Magnetic sensor technology and multi-point calibration improve measurement consistency.

Compact and Easy to Operate

Compact size and touchscreen interface make the instrument suitable for routine laboratory use.

Ideal for Petroleum and Chemical Laboratories

Widely used in transformer oil testing, surfactant analysis, lubricant evaluation, and latex testing.

FAQ – Automatic Interfacial Tensiometer