The instrument for IP level waterproof testing is actually a waterproof tester. In essence, it is an air tightness detector or a differential pressure leak detector. It is called a waterproof tester depending on the purpose of the test. In detail, it is called a waterproof tester. The main principle of watch waterproof tester, lamp air tightness tester, etc. is the same.
Most of the long-term waterproof detectors on the market currently use differential pressure detection. Compared with direct pressure detection, the data of the differential pressure method is more accurate and reliable. Its working principle is very simple, just like a balance. The two ends of the balance are the detection end of the workpiece to be inspected and the standard end of the instrument (completely sealed). Equal pressure gas is filled into both ends of the balance. If there is leakage at the detection end, Then the balance must be out of balance. Use the differential pressure sensor to read the difference between the two ends, which is the leakage value of the workpiece to be inspected.
As for linking IP waterproofing and airtightness, the main method is to convert the water pressure into the corresponding air pressure for testing based on the required IP grade standards. Currently, most waterproof products such as mobile phone accessories, watches, lamps, speakers, etc. are tested using waterproof testers.
At present, there are many domestic manufacturers of such instruments, and the quality varies. The quality of imported products is good, but the price is slightly higher. Based on their internal structure, I personally think that European and American products are better. At present, the product quality of individual manufacturers of domestic instruments is not inferior to imported instruments, and they are also good choices.