2UUL AT01 Air Leak Tester

A phone that left the factory water resistant doesn't stay that way automatically after a repair. Once a screen, back glass or battery has been replaced, the seals and adhesive are only as good as the technician's work, and the 2UUL AT01 is built to check that before the phone goes back to its owner.

The AT01 is an air leak tester from 2UUL for waterproof phones, tablets and similar devices. The listing describes a sensitive, battery-powered unit with a display, simple controls and several test modes for different devices.

When an air leak test is worth running

• After replacing a screen or back glass on a water-resistant phone.

• When a customer reports moisture or fogging after a previous repair.

• To catch a loose seal, missing gasket or poorly seated adhesive before handover.

• As a quality check on refurbished devices before resale.

Getting reliable results

The listing advises testing a fully assembled, sealed device, choosing the right mode for it and keeping the tester and work area clean. It also recommends periodic calibration and fresh batteries, since weak power can skew readings.

Treat a pass as evidence that the seal holds air, not as proof that the original water-resistance rating is back. Record the result on the repair ticket and tell the customer what was tested. If a phone fails, reopen it, check the adhesive line around the whole frame and test again rather than guessing which edge leaks.