Blog

People often ask me how to calibrate a PRISM 2 Rebreather. Proper calibration ensures you are referencing an accurate PO2 reading. It is one of the most critical procedures for preparing a rebreather. Each time you calibrate your rig, you are teaching the unit to read PO2 correctly. A particular oxygen fraction is applied to...

Why Dive PRISM 2? Nick Hollis Explains

The PRISM 2 is a simple and reliable rebreather that can be used for all types of diving from the shallowest photography dives to the deepest exploration dives. P2 owners are the silent stormtroopers of the underwater world. On a recent liveaboard trip (pre-Covid) there were a number of rebreathers from different manufacturers and a...

Women That Dive: 6 Questions for Marina Bozinovic

The world of marine research can be a hard field to break into. Long bouts of STEM academia, punctuated by intensive dive training are standard steps on the way to becoming an underwater scientist.  And in a field mostly dominated by men, it’s even rarer still to see an elite group of women pioneering new...

How the PRISM 2 is Used for Research

Like it or not, recreational scuba diving has its limits. While great for making brief visits to our underwater ecosystems, a typical scuba rig—even with nitrox—can only provide so much bottom time. For most of us, that’s okay, because the duration of a typical dive doesn’t usually need to be that long. But what about...

What’s new with the Prism 2 CE version?

So, what’s new with the Prism 2 CE version? The answer is...not a lot! After all, if it ain't broke, don't fix it. Since 2009 we have been building the Prism 2 rebreather in its current configuration with minimal mechanical changes. All of which have been released to our customer base individually or as running...

5 First Steps for Getting Rebreather Certified

To many, using a rebreather can seem like something only the best divers do. Premium costs, unfamiliar equipment and a lack of hands-on experience can make the process of starting your rebreather certification a little intimidating.  Nonetheless, the promise of longer dive times, better photographic opportunities and a much quieter overall experience make the prospect...

Prism 2 Receives CE Certification

After much hard work and anticipation, Hollis Rebreathers is proud to announce the Prism 2 Rebreather has just received CE approval by SGS in UK. Both the front mounted counterlung and back mounted counterlung variants passed all tests in accordance with EN 14143:2013. We are beyond pleased to present the Prism 2 to our European...

Greg Asner Wants Your Help To Fight Coral Bleaching

Greg Asner has a problem. As Director of ASU's Center for Global Discovery and Conservation Sciences, along with his team, he's spent years tracking the spread of coral bleaching around the world. The process, however, has become increasingly expensive and inefficient. To offset the cost and breadth of the study, he needs eyes in the...

Jill Heinerth’s Top Rebreather Safety Tips

Accomplished author, global explorer and badass cave diver Jill Heinerth knows what it takes to be in shape for diving. She’s travelled the world leading expeditions, discovering new geomorphic features and cave systems, so she deeply understands what it takes to exhibit physical and mental discipline on a day-to-day basis. Many of her extended dives—many...

LP Hose Quality Alert

Hollis Rebreather LLC has been notified of a safety concern regarding specific lots of low-pressure regulator hoses we have supplied to our customers. The manufacturer of these hoses, Danicorp, is conducting a hose recall of all low-pressure hose assemblies purchased between February 22 through September 30, 2018.  This product is suspected of not adhering to...