1. Image quality. Whether the image is clear or not directly affects whether the inspector can make correct decisions. Unclear images are likely to cause missed detection and misjudgment; the main indicator is the number of pixels; 

2. Lighting. Good lighting is an indispensable condition for clear imaging; 

3. Orientation. Probes that can flexibly bend in different directions (such as 360-degree guidance) can naturally detect every corner efficiently without leaving dead corners; 

4. Durability. This is also well understood, the detection environment is harsh, especially the probe has to be pierced in and out many times, the durable probe has a long service life, and reduces unnecessary expenses; 

5. Measurement function. Quantitative values for the size, location, development, and severity of defects are also very important for decision-making. Accurate measurement helps to make more correct decisions. 

6. Portability. The arduousness of the inspection work determines the intensity of the inspectors' work. Hand-held and portable devices will effectively reduce their burden and make the inspection more efficient. 

Due to long-term exposure to harsh industrial endoscopes, coupled with inspection personnel’s operation, etc., high-quality industrial endoscope products will inevitably fail. Therefore, in addition to the performance mentioned above, after-sales service is also very important. It is also a factor that cannot be ignored when choosing an industrial endoscope. Brands with good after-sales services often have not only experienced after-sales and maintenance teams, a full line of product prototypes and a comprehensive inventory of stock and spare parts, but also when the user’s equipment fails, the repair process can be quickly started, and some can also provide backup Machine to avoid losses to customers due to maintenance.