Hollis Prism 2 CCR Rebreather Review

Published: April 30, 2021

Last updated: July 24, 2023

Editor and Co-founder at DIVEIN.com

Torben traveled to South East Asia for scuba diving and never really stopped his search for new adventures. His affinity for gear that works and his...

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- Editor and Co-founder at DIVEIN.com

Where to buy

Hollisrebreathers.com

Content

The Hollis Prism 2 is a pretty sleek-looking unit, and it has got some serious technical chops to boot. Plus there are a few options for divers, such as choosing between electronic or manual control options and back-mount or front-mount counter lungs. Explore open seas, caves, or wrecks with ease.

Tested by ANSTI at 100 meters, the Prism 2 had the lowest work of breathing of any mixed gas CCR unit. Tanks and valves will need to be purchased separately.

Learn more about the Hollis Prism 2 here.

About this review

To help you find a Rebreather that will fit your needs, we’ve tested, researched, and reviewed the best ones available today.
We test both in the water, diving in various conditions - and in our lab - so we can give you accurate answers on quality, performance, and the overall value.

Read about our test of Rebreathers

Recommended in: Rebreather

Things we like:

Highly customizable, plenty of different options for add-ons, configurations, and dive styles
Rear-mounted radial scrubber
Excellent work of breathing
CE approved
Hollis has an excellent reputation for after-sales support

Things we don't like:

One of the finickiest scrubbers to pack in the industry
BOV is sensitive to freeflow on the surface

	Unit weight of 47 pounds in standard configuration
	Split counter lungs
	Both front and back-mount counter lung configurations
	Counter lung drains to easily remove water during a dive
	All gas lines external to the breathing loop
	Automatic diluent valve
	Manual diluent valve
	Air, Trimix, and Heliox suitable
	Manual oxygen valve for manual PPO2 adjustments
	Harness and BC or backplate
	Compatible with 2 and 3-liter cylinders
	LED display for an easy to monitor system status
	PPO2 displays for each sensor
	External power switch
	Push-button O2 calibration
	Large secondary display
	Supports diluent switching and multi-gas dive plans
	Two-button OC bailout
	CNS tracking for real-time oxygen exposure
	User updatable software
	Stand included with purchase

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