The worst nightmare for any underwater photographer is a flood. You know what they say: there are two types of underwater photographer- those that have flooded a housing, and those who haven’t…yet. Every time I get in the water with my camera, I always wonder if water will get into the housing. I think most underwater shooters have a ritual to follow when setting up the camera to avoid a leak, and I for one never used to deviate from mine. After all, some of the steps in my setting up process might be unnecessary, but my fear of a flood prevents me from changing the ritual.
Well, for a year now I have been using a leak detector, which lets me pressure test my housing before every dive, and it has made a massive difference to my confidence in how I have set up the housing (as well as allowing me to streamline my setting up ritual).
I use a device called Leak Sentinel, purchased from the very helpful Miso Milivojevic, who designed and manufactures them in Slovenia under the company name of Vivid Housings. The device fits into a spare strobe port on my housing; some of the air is evacuated from the housing with a small pump. If this under-pressure remains stable, then the housing has no leak and is safe to dive. The leak sentinel indicates this with a reassuring green flashing light.
I have just upgraded mine with a new circuit board which adds some new features. The Leak Sentinel can now compensate for temperature changes (which are likely to affect the pressure and potentially cause a false positive); it now allows me to test the housing a day or so before the trip, and also warns me when the leak sensor battery is getting low.The device has already paid for itself because it detected a leak in the system, which I spotted and corrected, rather than finding out when I got in the water….