Megalodon/DR Product Features
Breathing Loop
The axial flow scrubber canister design contains a water trap, provides simple and quick replacement of the CO2
absorbent and allows easy access to the three oxygen sensors and battery housings. The dual over-the-shoulder
counterlungs are independently shoulder/front-mounted and position adjustable to provide the most effective
breathing configuration for your body. Each counterlung contains a water trap and is fitted with a swivel valve
for manual addition of your gases and the valve accepts standard BC-type quick release hose fittings. The
exhalation counterlung includes a OPV with spin-valve, providing for the easy the removal of any trapped water,
even while underwater. The low-maintenance mouthpiece, called the Dive/Surface Valve (DSV), is compact and uses
a friction seal so there are no o-rings to wear out and replace. The DSV is designed for easy one-handed
open/close operation. Also included is the Auto Diluent Valve (ADV) which automatically adds diluent into the
breathing loop during descent as the gas in the loop compresses.
APECS™ 2.5 Electronics Package
The Advanced Personal Environmental Controller System (APECS™) has a simple self intuitive menu system
and essential information dive screen that minimizes the task loading of the diver. The electronic CCR control
system utilizes two separate electrically isolated and independently powered controllers and display handsets.
The only shared components are the three oxygen sensors which are accessed individually by the handsets, thus
requiring independent oxygen calibration on each handset.
- Primary - The primary controller is responsible for maintaining the chosen PO2 set-point by firing the
oxygen injection solenoid using voting logic with the three oxygen sensors. The primary handset display,
normally worn on the wrist, shows the three individual oxygen sensor values plus the average PO2, ambient and
breathing loop temperatures.
- Secondary - The completely redundant and electrically isolated secondary controller is responsible for
the heads-up-display. The secondary handset display shows the three individual oxygen sensor values plus the
average PO2 and also provides breathing loop temperature information.
- Heads-Up-Display (HUD) - The HUD displays the actual loop PO2 for each of three sensors via a code of
flashing red/green LED lights. The LED's also have a user adjustable dim/bright setting.
- Bilinear calibration - The two-point calibration system provides an exceptionally accurate high and low
point PO2 information. Calibration can be performed with air and any known gas of 70% or greater oxygen
content, and calibration can also be performed at high altitude. Individual sensor MV readings are also
displayed on the handsets.
- Power Management - APECS uses the very power efficient Jaksa automatic oxygen addition solenoid. The
handsets back light settings are timed on, always on, and off. There is a display power save option, to turn
off displays after 10 minutes of inactivity. With these options the diver has great flexibility in managing
power consumption and handset readability. The handsets also display the battery voltage, both for no-load
and load (i.e. when the solenoid fires), as well as battery low indicators.
- Set points - The diver has the following set points that may be selected during the dive, or preselected
prior to diving: Manual (0.2), 0.4, 0.7, 1.0, 1.1, 1.2, 1.3, 1.4, and Auto Set Point (ASP).
- Adaptive O2 Injection Algorithm - The O2 injection algorithm which controls the solenoid firing may be
adjusted by the diver to select personal preferences to provide very smooth setpoint maintenance.
- These features are just the highlights, for more details consult the APECS 2.5 Operation Manual .
Regulator's and SPG's
The Megalodon/DR rebreather uses the highly reliable and easily serviceable Dive Rite RG1208 first stage
regulators. The regulators each have a Dive Rite Over Pressure Valve installed in a low pressure port. Each
regulator has a Dive Rite compact 1.5-inch submersible pressure gauge (SPG) and the Oxygen SPG has a color
coded green boot. The oxygen regulator supplies a manual addition valve and the oxygen injection solenoid. The
diluent regulator supplies a manual addition valve, ADV, and BC inflator hose. All hoses, gauges, fittings and
valves are US industry standard although SPG's are optionally available in BAR.
Cylinder Options
The Megalodon design allows the diver to choose between a large variety of gas supply cylinders using standard
left and right modular DIN valves. Divers of varying statures will appreciate this flexibility as they can
customize their Meg to fit their body type as well as adjust the weight of the unit by selecting cylinders that
are lighter or heavier. We suggest aluminum 13 or 19 cubic foot capacity cylinders, which minimizes the
rebreather total weight. Drysuit divers might consider steel 23 cubic foot cylinders if they need to provide
additional weight. With the volume of the larger cylinders, diluent capacity is sufficient to support on-board
bailout for the sport diver, and provides plenty of oxygen capacity even with transfer under filling. The ISC
Shadow Mount cylinder mounting system is included in the base price of the Megalodon/DR, however
cylinders and valves are priced separately.
Harness and Air cell Options
The Megalodon rebreather provides standard 11-inch centers mounting which accepts any of Dive Rite's buoyancy
control systems. The diver may choose from an enormous variety of harness configurations including the ultra
comfortable TransPlate technical harness and backplate systems. The diver may even choose traditional webbing
harness systems, incorporating aluminum or stainless steel backplates. Choose from a variety of Dive Rite's air
cells, depending upon your buoyancy requirements. A BC integrated Dive Rite RiteSource second stage is
available for those divers who wish to have rapid bailout to on-board diluent. Note the harness and air cell
are priced separately and not included in the base price of the Megalodon/DR. We also offer the Megalodon
Expedition package, which includes the Dive Rite TransPlate harness, backplate and Trek Wing aircell, along
with a spares kit and the head-only calibration kit. The Meg/EX package is an excellent value and highly
recommended.
Consumables
The recommended consumables are: Megalodon 7.5V Alkaline Battery Pack, Molecular Products Sofnolime 8-12 mesh
(1-2.5 mm granules) CO2 absorbent, DuPont RelyOn MDC (formerly Virkon) 1% solution for breathing loop
disinfection, Lubrication-Technology Christo-Lube MCG-111 oxygen compatible lubricant for O-ring seals, and
Caig Labs DeoxIT GOLD for cleaning gold electrical contacts.
Training
The Megalodon rebreather requires formal training for safe use. The pricing does not include training, and
training is solely the responsibility of the purchaser. Training is available worldwide from ISC approved instructors. The training
time is five to seven days consisting of a classroom lecture, confined water session and at least seven OW
dives. Fill Express also offers Megalodon instruction at our International Training Center in SE Florida.
When you purchase your Megalodon rebreather, we suggest you immediately complete the required Liability Release and mail it to Innerspace Systems
Corporation. If you are not already certified for the Meg, at the current time as per ISC requirements
we are only able to ship the unit to your instructor.
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