Classification and purchase of optical contact angle meters

First, the overall classification of contact angle meter:

The existing contact angle meters are mainly divided into the following three categories:

1. Protractor: This type of instrument is based on the first lens cross-shaped angle. Specific to the contact angle analysis method, they will all be written as a protractor. (Please pay attention to the difference between English names).

2, standard contact angle meter: This type of instrument usually uses CCD + software system. From the analytical method, they no longer stay in the simple contact angle analysis stage such as high volume angle, but based on simple curve analysis. Such instruments are now widely used abroad. However, it will be affected by the assumptions of interface chemistry theory.

3, advanced contact angle meter: This type of instrument has an optical system to try to obtain high-definition images, to avoid the impact of background noise.

Second, optical imaging system and contact angle meter purchase

The quality of the optical imaging system will directly affect the contact angle software analysis. After all, the computer system is advanced, and he can directly recognize images as well as people. Therefore, the advancement of optical system design is all the key.

Usually, we use a lens and CCD that amplify a certain magnification. The effect of specific imaging can only be clearly understood by looking at the actual picture. However, the standard for good imaging results can be that the background of the image is clear and does not affect the overall observation. The prospects are well imaged, and to the real sense, we think it's best to have a metallic feel.

Third, contact angle host and contact angle meter to buy

The main unit of the contact angle meter is mainly reflected in the overall stability and ease of operation. These will involve the accuracy of focusing, overall stability, compliance with host design and software design, and more.

But more importantly, there is a more important factor in the design of the mainframe, that is, the shape of the test item and the volume (length, width, height) of the testable sample. Beijing Universal Hengda can customize various types of mainframes. . We recommend that you consider this factor when purchasing, otherwise you can test it and find that it can't be completed.

At the same time, the design of the host will be different depending on the operation you want to accomplish. These must be confirmed with the manufacturer's sales engineer. However, if the other engineer does not understand some of the key technologies of the host design, it means that he does not understand the application of the overall contact angle meter, and you may indeed need to consider whether to purchase the instrument from them.

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