Surface and interfacial tension measurement tensiometer UHV-670

for oil-water interfacial tensionwith touch displayautomatic

Product Introduction
The UHV-670 automatic oil interfacial tension tester measures surface tension (liquid–gas) and interfacial tension between mineral oil and water (liquid–liquid). Designed for transformer oil and a range of liquids, it delivers automated measurements with integrated standard calculations and a color touchscreen for guided operation.

Key Features of Oil Interfacial Tension Test Equipment

• Color touch screen display with Chinese-character menu prompts; the menu integrates all test and calculation content according to GB6541 standard.
• High degree of automation, reliable operation and good repeatability; simple menu-guided workflow allows tests to be completed immediately after power-up.
• Capable of measuring surface tension of various liquids (liquid–gas) and interfacial tension between mineral oil and water (liquid–liquid).

Other names / Synonyms

• Surface Tension Tester
• Oil Surface Tension Tester
• Oil Surface Tension

Specifications / Technical specifications

• Display method: Color touch screen display with Chinese-character menu prompts; menu compiles all test and calculation content according to GB6541 standard.
• Measuring range: 2 200 millinewtons/meter.
• Sensitivity: 0.1 millinewtons/meter.
• Accuracy: 0.1 millinewtons/meter.
• Resolution: 0.01 millinewtons/meter.
• Repeatability: 0.3%.
• Applicable temperature: 10 30 ℃ (typical value: 25 ℃).
• Applicable humidity: 20 75% RH.
• Power supply: AC 220V ±5% 50Hz.
• Power: 20 VA.
• Dimensions: 185 × 260 × 360 mm.
• Weight: 15 kg.

Working Principle of Automatic Interfacial Tension Tester

• The working principle of this Automatic Interfacial Tension Tester is to apply the high-frequency induction small displacement automatic balance measurement system to the torsion balance. When the force acting on the platinum ring changes, the balance rod connected to the platinum ring will produce displacement in the two eddy current probes, causing the inductance generated in the two eddy current probes to change. This will cause the differential transformer to lose balance, and the input signal of the differential amplifier in the circuit will also lose balance. After amplification by the amplifier, an electrical signal that changes with the force on the platinum ring will be output. This signal is sent to the microprocessor for processing, and the actual tension of the tested sample will be automatically calculated according to international GB6541.

Application Field of Automatic Interfacial Tension Tester

• 1. Oil and power industry
• Measure the interfacial tension of insulation oil and transformer oil, evaluate the purity and degradation degree of oil products, and ensure the safety of power equipment.
• Analyze the interfacial tension between crude oil and water to guide the optimization of oil extraction and tertiary oil recovery processes.
• 2. Chemical and Materials Science
• Surface active agent performance testing, studying its adsorption, dispersion, and stability (such as CMC determination).
• Wettability analysis of polymer materials, coatings, and inks, optimizing formulations and processes.
• 3. Pharmaceutical and food industries
• Assessment of solubility and stability of drug formulations, such as tablet wettability analysis.
• Interface tension testing of dairy products and beverages in food to ensure product taste and shelf life.
• 4. Environmental Protection and Scientific Research
• Water quality monitoring evaluates the degree of water pollution through changes in surface tension.
• Research on surface properties of materials (such as wettability of fibers and nanoparticles) to support the development of new materials.
• 5. Other fields
• Analysis of emulsion stability in cosmetics to ensure uniform dispersion of ingredients.
• Assessment of the adsorption and permeation capacity of pesticide formulations to optimize spraying effectiveness.

FAQ of Surface Tension Tester

• Q: Which liquids can be measured with this Oil Surface Tension Tester?
• A: The Oil Surface Tension Tester is suitable for transformer oil, insulating oil, turbine oil, lubricating oil, hydraulic oil, surfactants, chemicals, petroleum products, and other liquid samples requiring surface or interfacial tension analysis.

• Q: What services are available after purchase?
• A: We provide installation guidance, operation training, technical support, spare parts supply, remote troubleshooting, software upgrades, and warranty service to ensure long-term reliable operation.

• Q: Have your products been exported internationally?
• A: Yes. Our Oil Surface Tension Testers have been exported to power utilities, laboratories, transformer manufacturers, and industrial customers in Asia, Europe, the Middle East, Africa, and South America. We have extensive experience in international logistics, technical support, and export documentation, ensuring a smooth purchasing process for overseas customers.