Leaks are detected by measuring the vacuum level. The surface area where a wand tip is placed is made of PPS (Polyphenylenesulphide).
Vacuum wand tip condition tester. Wand tips can become less efficient with use if the contact surface deteriorates due to minute scratches, etc. This device can be used to check that the wand is performing correctly. The tip contact parts are made of PPS (polyphenylsulphide).