With their ability to function at a precise psi, this device incorporates two Model #132s. The system's pressure is negative, and the membrane maintains contact with the touch screen. Any time the user wishes to use the device, the internal pressure must be increased slightly to a very small - and specific - positive pressure. Therefore, more CO2 or air is used to pressure balance the interior of the system against the ambient water pressure. This action protects the device from crushing during a descent by limiting the differential pressure between the ambient and internal pressure. This differential pressure is maintained in a negative range of a few psi, and it keeps the device safe. During a descent, the device is not usable, but the balance module continually balances pressures. The iDive functions with either liquid CO2 cartridges (~800 psi gaseous CO2) or with first stage regulator air pressure (~100 psi) as the input. A unique pressure balancing mechanism, called the balance module, passively uses the input (from the CO2 or air) in direct proportion to the ambient water pressure. The deeper the iDive system goes, the higher the ambient water pressure. Additionally, the housing includes a pressure management system to allow the critical function of bleeding air during ascents. As an important design component, the membrane and touch screen must have a physical gap of air between them to allow finger contact to be recognized underwater. Next, and more challenging, developers had to create a flexible membrane/pressure balancing system to allow users to interface with the touch screen. The first requirement was met with a waterproof housing designed to safely operate in extreme pressures. To successfully use a touch screen device underwater, iDive developers had to 1) keep the device dry and 2) ensure users could interface with it at various water depths. This application is one way innovative companies are bringing marine science into the 21 st century. This product, developed in collaboration between Watershot and Inova Design, Inc., uses Smart Products' Model #132 Side Seal as pressure relief valves within the system's balance module. With over 180 logged dives, Alyne is currently working to obtain her Divemaster certification with expectation to complete it by Spring 2023.Divers can now record data without having to leave their underwater office with the new iDive iPad Housing device. Alyne was open-water PADI certified in May 2021 and continued to acquire advanced and specialized diving certifications. She realized then that this newly discovered adventure would provide her with endless possibilities for exploration and learning opportunities. The sun rays were reflecting, and the lighting was just right for what seemed like such great visibility for New England diving. Her newfound passion for SCUBA diving was solidified during her very first time diving in open-water when she saw the tiniest snail on a blade of seagrass swaying back and forth with the current. Never mind the fact that she was in her very first pool session, only four feet deep, and in an indoor pool working to become a certified SCUBA diver.
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