Surface Tension Analyzer

I. Overview  No Chinese content provided. Please provide the text to be translated.

The EDZL-3 Interfacial Tension Tester conforms to the GB6541-86 "Determination of Interfacial Tension of Petroleum Products Between Oil and Water (Ring Method)" standard, measuring the surface tension of various liquids (liquid-gas interface) and the interfacial tension between mineral oil and water (liquid-liquid interface).

The EDZL-3 Interface Tensiometer features a large-screen dot matrix LCD display, with menu prompts in full Chinese characters and unmarked keys, offering high automation, reliable performance, good repeatability, and extremely simple operation. Just follow the menu prompts after turning it on to complete all tests.

Technical Specifications

Backlit large screen dot matrix LCD display, Chinese menu prompts

          Menu assembled inAll testing and calculation contents in GB6541 standard.

Keypad: Unlabeled key under Chinese menu prompts

Measurement Range:2 to 100 mN/m

Sensitivity:0.1 mN/m

Accuracy:0.1 mN/m

Resolution:0.1 millinewtons/meter

Repetitiveness:0.3%

Applicable Temperature:10-30°C (typical value: 25°C)

Applicable Humidity:(20～75)﹪RH

Power: AC220V±5%    50Hz

Power:20VA

Dimensions:185 x 260 x 360 (mm)

Weight:15 kg

III. Working Principle

The EDZL-3 interfacial tension tester employs a working principle that integrates a high-frequency induction micro-displacement automatic balance measurement system into a torque balance. As the force acting on the platinum ring changes, the balance rod connected to the platinum ring produces displacement in two eddy current probes. This displacement alters the inductance in the two probes, causing a differential transformer to lose balance. Consequently, the differential amplifier's input signal in the circuit also loses balance. After amplification, an output electrical signal that varies with the force on the platinum ring is generated, which is then sent to a microprocessor for processing. The actual tension of the tested sample is automatically calculated in accordance with the international standard GB6541.