The key to choosing a Surface Tensiometer is to look at the customer's application. When purchasing, we recommend that customers consider the following aspects:
1. Familiar with the testing principle of Surface Tensiometer
According to the different principles of the Surface Tensiometer above, you can consult professional suppliers about the main differences of the various principles of the Surface Tensiometer. Then, combined with your testing needs, choose a Surface Tensiometer that meets your testing purpose. The main reason is that the price of the Surface Tensiometer will be different due to the different principles. At the same time, the price of the Surface Tensiometer may be different because of the different standards used for the Surface Tensiometer with different origins. You can find the difference between tensiometer suppliers or manufacturers through the product catalog provided by the suppliers. In short, it is the most critical to confirm which principle Surface Tensiometer is suitable for you.
At the same time, usually in the process of discussing Surface Tensiometer technical issues with suppliers, you can find out which suppliers do not master the technology, which are only commercial agents, and which only know how to produce an instrument, but this is not the other Main business, also unable to complete future technical services.
All in all, choosing a Surface Tensiometer is not only based on whether there is an instrument, but also on the upgradeability and technical services in the future. Usually some companies that do not have independent research and development capabilities only need to say something empty, such as how the appearance is, or our instruments are very good in CHINA, or we must be accurate in measurement, or our domestic sales are better. But these empty words cannot prove its true strength.
2. Surface tensiometer use requirements and accuracy requirements
You may have different testing requirements. You can consult the tensiometer manufacturer or agent for the parameters of the tensiometer to make a decision, and decide which model or test principle of the tensiometer to purchase.
Please note that different designs of Surface Tensiometers will result in different test accuracy. Platinum ring method tensiometer, platinum plate method tensiometer, pendant drop method Surface Tensiometer, rotating drop method Surface Tensiometer or drop volume method Surface Tensiometer, etc. have different errors in the measured value due to the effect of the test principle. Instead of using the resolution of the Surface Tensiometer as the test accuracy or deliberately improving the accuracy of the measured value as some manufacturers or agents claim. We believe that test accuracy refers to the repeatability of two measured values and the consistency of the test value with the absolute surface tension value of the liquid. for example,
If you are testing the surface tension value of water, the platinum plate method Surface Tensiometer can achieve a value of 72.8mN/m or dyne/cm, and the temperature needs to be controlled at 20 degrees Celsius, then this Surface Tensiometer is good. As a comparison, the Platinum Ring method may not be able to measure this value, and sometimes it may not be able to measure an accurate value due to the accuracy of the measurement. When repeating the test, whether the error is within the standard range. This is the key to inspecting the accuracy of the Surface Tensiometer.
Generally speaking, if it is a sample that can be tested in principle, we believe that its measurement accuracy or error range is such a relationship. instrument, drop volume method surface tensIon Meter) > maximum bubble method surface tensIon Meter > weighing method surface tensIon Meter (platinum plate method and platinum ring method).
The measurement accuracy of gravimetric Surface Tensiometer (platinum plate method and platinum ring method) depends on:
(1) Sensor accuracy; (2) Platinum plate design accuracy; (3) If the platinum plate method is used, it also depends on the accuracy of buoyancy correction.
3. The qualifications of manufacturers and agents are more critical
At present, some domestic manufacturers or agents do not master the technology of Surface Tensiometer or the principle of interfacial chemistry, but only through imitation or through business negotiation as an agent or produce Surface Tensiometer, which often misleads our customers during the procurement process. Its main sign is that it is impossible to talk about deeper technical issues without talking about technology with you, just talking about the price or just talking about some empty comparisons of advantages and disadvantages without data. These must arouse your attention when purchasing. As an agent of imported Surface Tensiometers, we must inspect the professional skills of the agents when purchasing. Otherwise, after-sales service may not be guaranteed. Some Surface Tensiometer agents are just a salesperson, they rent a store or even work in a poor residential area, and they just want to complete the Surface Tensiometer service by changing a place. We think this is definitely not enough.
