Aquatica SURVEYOR Moisture and Vacuum Sensor for AD4 Underwater Housing

Prevent leaks and keep your Nikon D4 camera safe in Aquatica's AD4 Underwater Housing with the SURVEYOR Moisture and Vacuum Sensor. This unit is sensitive to atmospheric pressure, and it allows you to confirm watertight integrity before diving. An included compensation function improves accuracy by ensuring that changes in ambient or internal temperature will not cause incorrect readings.