Hollis Rebreathers Blog

BMCL Inner Bladder Replacement

Date: 9/26/2023 Bulletin: Quality Alert HR.0003 Author: Nick Hollis Title: BMCL Inner Bladder Replacement Part Numbers:220.9501 220.9502 220.9503 Due to reports of the original BMCL inner polyurethane bladders failing during normal operation, we are advising all users to immediately stop using the polyurethane version and upgrade to the latest 420D...

Electronics Cover – 28990

Date: 11/30/17Bulletin: Quality Alert HR.0001Author: Nick HollisTitle: Electronics Cover - 28990Part Number: 28990 Purpose of Notice: It has come to our attention that the Electronics Cover - 28990 found on the Prism 2 Rebreather could be subject to corrosion under certain diving conditions, primarily in salt water. Affected battery covers were manufactured between January 2012...

Jill Heinerth: How to Calibrate Your PRISM 2 Rebreather

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

Marina Bozinovic, Dive Officer at Cal Academy, has worked (and trained) her way into becoming a leader on the Cal Academy dive research team.

How the Prism 2 is Used for Research

When the typical scuba rig isn’t enough, underwater pros turn to a rebreather—such as the Prism 2—to increase the amount of time they can spend underwater.

What’s new with the Prism 2 CE version?

So, what’s new with the Prism 2 CE version? The answer is...not a whole lot. Why mess with a good thing? After all, if it ain't broke, don't fix it.

5 First Steps for Getting Rebreather Certified

What are the best ways to get started on the path to rebreather certification? How does one get primed and ready for a rebreather course?

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 Wants Your Help To Fight Coral Bleaching

Huish Ambassador, Greg Asner, wants your help to fight coral bleaching. Here is how you can help, how it is done, and how to keep our oceans healthy

Hollis Rebreathers