Table of Contents

Product Introduction

Compliant with GB6541-86 Standard Test Method for Interfacial Tension of Oil against Water by Ring Method, it measures surface tension of various liquids (liquid-gas interface) and interfacial tension between mineral oil and water (liquid-liquid interface). Equipped with a color touch screen and unmarked keys with Chinese menu prompts, the instrument features high automation, stable performance and excellent repeatability. Simply follow on-screen menu instructions after startup to complete all tests.

Alternative Names: Automatic Tensiometer, Automatic Tension Tester, Surface Tension Tester

Technical Parameters

Item	Specification
Measuring Range	2 ~ 200 mN/m
Sensitivity	0.1 mN/m
Accuracy	0.1 mN/m
Resolution	0.01 mN/m
Repeatability	0.3%
Operating Temperature	10 ~ 30°C (Typical: 25°C)
Ambient Humidity	(20 ~ 75)%RH
Power Supply	AC 220V±5%, 50Hz
Power Consumption	20VA
Overall Dimension	185×260×360 (mm)
Instrument Weight	15kg

Application Scenarios

This interfacial tension tester is widely applied in power utilities for aging assessment of transformer insulating oil. It supports laboratory inspection and on-site substation testing, monitoring oil deterioration to guide oil maintenance, replacement and ensure safe operation of power transformers.

It also meets detection requirements for petrochemical, chemical and environmental laboratories, measuring surface and interfacial tension of various liquids strictly in accordance with ring method standards, delivering stable and repeatable test results for quality control research.

Packing List

No.	Item Description	Specification	Quantity	Unit	Remark
1	Main Unit of Interfacial Tension Tester	HF-TC-639	1	Set	Core testing equipment
2	Platinum-Iridium Ring (Test Ring)	Standard ring method design	1	Piece	Core testing accessory
3	Sample Vessel	Matched with main unit	1	Set	For liquid sample testing
4	Power Cable	AC 220V±5% 50Hz	1	Piece	For power supply connection
5	Operation Manual	Original factory version	1	Copy	Full operation & maintenance guidance
6	Certificate of Calibration	Factory calibrated	1	Copy	Official calibration data report
7	Packaging Foam & Wooden Case	Customized shockproof packaging	1	Set	For long-distance transportation protection

FAQ for Interfacial Tension Tester

Q1: What standard does this interfacial tension tester comply with?

A1: It follows GB6541-86 Standard Test Method for Interfacial Tension of Oil against Water by the Ring Method, suitable for testing surface tension and liquid-liquid interfacial tension.

Q2: What samples can this instrument test?

A2: It measures surface tension (liquid-gas phase) of various liquids and interfacial tension between mineral oil and water, widely used for transformer insulating oil detection in power industry.

Q3: What is the measuring range of the equipment?

A3: Measuring range: 2~200 mN/m, resolution 0.01 mN/m, with excellent repeatability up to 0.3%.

Q4: Is the operation complicated?

A4: No. It adopts a color touch screen with menu prompts. Users can complete the whole test automatically just by following on-screen instructions after startup.

Q5: What are the ambient requirements during testing?

A5: Ambient temperature: 10~30°C (recommended 25°C); humidity: 20~75%RH. Avoid strong airflow and vibration during measurement.

Q6: How should we maintain the platinum-iridium test ring?

A6: Clean the ring thoroughly with solvent and flame it gently before each test to eliminate residual contaminants, to guarantee accurate test results.

Q7: Can it be used for on-site substation inspection?

A7: Yes. Compact structure, stable performance and easy operation support both laboratory analysis and on-site field testing.

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