LFY-254B Liquid Surface Tension Tester (Pulling Liquid Film Method)

Main purpose/Use 
The liquid surface tension tester is suitable for measuring the surface tension of surfactants, organic solvents, and mixtures containing one or more surfactants, as well as pure liquids or solutions. 
Instrument Characteristics 
1. The principle of the platinum ring test is simple and convenient to operate. 
2. Automated digital measurement reduces human operational errors; 
3. Full-range reset: A single click for complete reset, accomplished instantly, with zero drift at the zero position; 
4. Full-range automatic calibration: The data is accurate and reliable, with excellent repeatability; 
5. During the platinum plate test, the displayed value represents the surface/interface tension value of the sample, and no further calculation is required; during the platinum ring test, it has a peak retention function. The surface/interface tension value needs to be calculated through Excel or automatically converted using data processing software. 
6. The instrument is compact in structure and operates independently, without requiring any additional equipment (such as an external computer, etc.). 
7. Capable of measuring the changes in the surface tension of the sample over time (especially when there are surfactants or volatile substances present, limited to the platinum plate testing mode); 
8. Automatically measure medium and high viscosity liquid samples and obtain accurate balance results (limited to platinum plate testing mode); 
9. Measurable interfacial tension between non-miscible liquids, such as the oil/water interface; 
10. It can completely replace the traditional mechanical surface tension meter. 
11. This series of instruments, apart from allowing manual control of the sample platform's elevation, has similar main structure and technical parameters to the QBZY series. It features high-quality design, an economical price, and an exceptionally high cost-performance ratio. 
Technical indicators 
Test mode: Platinum ring 
Measurement range: 0 - 400 mN/m 
Measurement accuracy: 0.01 mN/m 
Accuracy error: 0.04 mN/m 
Repeatability error: 0.04 mN/m 
Test sample temperature range: 0 - 100℃ 
Applicable Standards 
GB/T 5549-2010 Surface Active Agents - Determination of Surface Tension by Pulling Liquid Film Method