Surface Tensiometer (ASTM D971 & ISO 1409 Compliant)

The Surface Tensiometer (ASTM D971 & ISO 1409 Compliant) is a high-precision automatic instrument engineered for professional laboratory analysis. By integrating a 32-bit ARM microcomputer with advanced LVDT sensor technology, this unit provides rapid, stable, and highly repeatable measurements of surface and interfacial tension for oils, surfactants, and chemical polymers. Du Noüy Ring Tensiometer method for maximum precision

Global Standard Compliance

This instrument ensures total traceability for industrial audits, meeting and exceeding the following global testing protocols:

• Petroleum & Insulating Oils: ASTM D971, ISO 6295, GB/T 6541.

• Polymers & Rubber Latices: ISO 1409, GB/T 18396.

• Surfactants & Detergents: ASTM D1331, QB-T1323.

• General Interface Methods: SY-T5370.

Reliable Interfacial Tension Tester for Industrial Fluids

1. Advanced Scientific Calibration

Unlike traditional meters that rely on gravity-based correction, this surface tension meter utilizes dual standard substances for calibration. This allows the operator to compensate for minor deformations or contamination in the platinum ring without the need for expensive replacements, ensuring long-term accuracy and lowering maintenance costs.

2. High-Precision Electronics

• 32-Bit ARM Control: High-speed processing power combined with specialized filtering algorithms ensures stable and accurate readings even in sensitive environments.

• 24-Bit ADI Converter: Featuring high-grade components from American ADI, the meter offers ultra-sensitive force acquisition for precise data capture.

• LVDT Displacement Sensor: Provides superior linearity and impedance matching, resulting in industry-leading repeatability and sensitivity.

3. Superior Mechanical Integrity

• Vibration-Free Design: The integrated molded shell and precise direct transmission mechanism eliminate physical interference during the test, which is critical for high-accuracy results.

• Linear Torsion Wire Lever: An optimized motion track for the sensor core ensures perfect linearity across the entire measuring range (0~200 mN/m).

Intelligent Automation

• Auto-Stop & Lock: The lifting table automatically stops and locks the result once the surface tension peak is reached, preventing sample over-travel.

• Smart Averaging: Automatically calculates the mean value from multiple test cycles, reducing operator workload and eliminating manual calculation errors.

• Dual-View Digital LCD: Read real-time force values and final test results simultaneously on a clear, backlit digital interface.

Technical Specifications

Applications

• Power Industry: Testing transformer oils and insulating liquids.

• Chemical Manufacturing: Quality control for surfactants and cleaning agents.

• Petroleum Research: Oil-water interface tension for enhanced oil recovery.

• Academic Labs: Precise data for university-level research.