Roxer Diabolic E Watch Leak Detector - HW44

Diabolic E watch leak detector. Ideal for individual testing of watches and after sales service. The electric pump creates a partial vacuum which produces an increased pressure in the watch case compared to its environment. This obliges the air inside the watch case to escape, which can be seen in small bubbles in the water. Even a slight leak will be seen without endangering the watch movement, the watch face or the watch hands.