Digital Surface Tension Meter/Automatically Interface Tensiometer

Structure and working principle:

The instrument's structure primarily comprises a torsion wire, sensor, platinum ring, and lifting component. During operation, the platinum ring is immersed in a specific position of the liquid under test. A motor, belt, and tray drive the glassware containing the liquid to descend, stretching the film between the platinum ring and the liquid. This stretching subjects the platinum ring to a downward force, causing the torsion wire to twist via a lever arm. The sensor measures the displacement at the lever arm's opposite end, converting the film's deformation into a voltage. After circuit processing, this voltage is transformed into the corresponding tension value, which is automatically displayed. As the film stretches gradually, the tension value increases until the film breaks. The maximum value is recorded as the measured tension value $P$ of the liquid. Multiplying $P$ by the liquid's correction factor $F$ yields the actual tension value $V$, i.e., $V=P\cdot F$. The correction factor $F$ depends on the measured tension value $P$, liquid density, platinum wire radius, and platinum ring radius.

For example:

After zero adjustment, place a 500mg weight on the paper. The displayed value should be 40.8±0.1. If not, adjust the potentiometer to reach this value before conducting liquid tension tests. Normally, no adjustment is needed if the tension value is within the allowable error range. Calibration is required when using the instrument for the first time, after long-term storage, or when significant test result errors are suspected.

Technical data:

1. Model: JZYW-200C
2. Measuring Range: 0–199.9 mN/m
3. Minimum Resolution: 0.01 mN/m
4. Platinum Ring Radius: R9.55 mm
5. Platinum Wire Radius: r0.3 mm
6. Power Supply: 220V 50Hz
7. Relative Error: Within ±1%
8. Dimensions & Weight: 200×260×300 mm, 10 kg
9. Temperature Requirement: (20±5)°C

Performance:

1. Tension displayed on LCD
2. Peak value hold function
3. Automatic average calculation
4. Automated test bed movement with auto-stop

Standard:

JB/T9388 ISO/1409

Applicability:

Physical methods are employed to measure liquid tension. This type of tensiometer finds extensive use in scientific research institutions, universities, and water & power sectors.

Configuration:

Parameter:

 Beijing Tonghe Testing Instruments Co., Ltd. Profile
1. Company Foundation and Positioning:

Beijing Tonghe Testing Instrument Co., Ltd. was founded by a core team with over 20 years of experience in material testing and testing machine R&D. With mature technical solutions and a global perspective, it provides high-quality and the most suitable testing machines for customers worldwide. 

2. Beijing's Regional Advantages (Market and Foreign Trade):

Relying on Beijing's status as a hub for international exchanges and technological innovation, the company can quickly connect with global market trends and capture demands in regions such as Europe, America, and Southeast Asia, laying an efficient foundation for communication and response in foreign trade business. 

3. Technological R&D and Product Applications:

Leveraging the scientific research resources of universities in Beijing, it has in-depth collaborations with research institutions in materials science and precision manufacturing. By integrating its own technical accumulation with cutting-edge achievements, it has made breakthroughs in the precision and stability of core products such as electronic and hydraulic universal testing machines. These products are applicable to testing scenarios in multiple fields including aerospace, automotive parts, and building materials. 

4. Production and Supply Chain Advantages:

Relying on Beijing's high-end manufacturing industrial chain and supply chain, it achieves efficient coordination from core component procurement to finished product assembly, ensuring product quality consistency. Meanwhile, it can quickly respond to customized demands and shorten the delivery cycle. 

5. Global Market Expansion and Services:

The team is familiar with international customer service as well as industry standards and certification requirements in various regions. Its products have obtained CE certification and comply with ISO standards. A professional foreign trade service team has been established to provide full-process localized support, and its products have entered the industrial inspection markets in Europe,  America, Southeast Asia, and other regions. 

6. Core Drivers and Vision:

Driven by "technical accumulation and regional empowerment", it transforms mature industry experience into product competitiveness and is committed to becoming a trusted equipment supplier in the global material testing field.