According to international standards, industrial connector plug and socket (Industrial Panel Socket) connector protection grade is divided into two parts, the first part is dustproof, the protection grade from low to high score is 1-6, the greater the number, the higher the protection grade. The second part is waterproof, according to the protection level from low to high, the number is 1-8, the bigger the number, the higher the protection level.

IP44

The first number in IP44 is 4, which means that the solid or diameter larger than 1mm is 1.0mm or 1mm.

IP44 second number 4: splash splash / any direction should be no harmful effects

IP67

The first number in IP67 is 6: dust / dust free entry.

The second digit number in IP67 is 7. It means that the water in the regulated pressure is not allowed to enter the water after the prescribed time.