Stop killing your eardrums when you equalise! The Dry Gauge is aimed at both scuba divers and freedivers (and spearfishers!). It allows you to measure the pressure you exert when you equalise, and thus learn how to reduce it.

In fact, a majority of divers and freedivers exert too much pressure on their eardrums. This leads to discomfort, pain, and even long-term hearing loss. As an example, we have found that most scuba divers (using Vasalva to compensate) instinctively exert a pressure of more than 70mm of mercury, i.e. more than three times the necessary pressure.

The Dry Gauge will allow you to measure the pressure you exert, and to train yourself to reduce it.

• More than 50mm of mercury? NOT GOOD!!!
• 15 to 20 mm of mercury: your eardrums will thank you!
• 2-3mm of mercury: Most likely you are using BTV to equalie? If not… think about it, because it seems you have a predisposition!