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This Moisture Alarm with Pressure Sensor and On/Off Switch from Aquatica is part of their Vacuum Circuitry and Moisture Alarm Kit for select underwater camera housings in their line. Please see the list below for compatibility. The alarm and sensor combination allows you to confirm watertight integrity inside the housing before the dive. The vacuum valve and pump are not included here.
Once your camera is installed, simply push the start actuating button (integrated on the circuit board). The LED light will turn green for two seconds to confirm actuation. Once a solid vacuum is achieved using the vacuum valve and pump, the LED will blink green again for two seconds. During the dive, the LED will flash green every few seconds, indicating system integrity. If the vacuum starts to decrease, the LED will start to flash orange, and if water is detected, the audible alarm will go off and the LED will also flash red.
This advanced Aquatica circuit has a temperature compensation function included, so any change in ambient temperature or changes in the internal temperature will not cause an incorrect reading. The onboard start actuating button is for the vacuum only; your alarm is always on. This alarm and sensor unit is initially installed in the housing before shipment and is offered here as a spare or replacement part.
Compatible Camera Housings
Aquatica underwater housings for the Canon 5D Mk III, 5D Mk II and 70D, and the Nikon D4, D800, D600 / D610, D300s and D7100 cameras