Megalodon Product Features
Breathing Loop
The 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 the 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 an OPV with a spin-valve, providing for the easy 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™ 2.7 Electronics Package
The Advanced Personal Environmental Controller System (APECS™) has a simple intuitive menu system
and essential information dive screen that minimizes the task loading of the diver. The electronic CCR control
system utilizes a electrically isolated and independently powered controller and display handset.
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 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.
- 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 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 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
handset back light settings are: timed on, always on, and off. Additionally, 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 Operational Instructions (v. 2.5).
Predator Electronics Package
The Predator electronics package from
Shearwater Research
provides an
electrically isolated and independently powered secondary PO2 display handset.
The Predator is completely OEM integrated with the Megalodon rebreather and provides
full real time decompression dive computer capabilities,
including required stop obligations and time-to-surface calculation.
Features of the new Predator CCR dive computer
include:
- Loop PO2 Monitoring w/CNS Tracking
- Air, Nitrox, Trimix and Heliox gas support
- User Defined Gradient Factors Conservatism
- Easy to Read and Simple to Use
- Adaptive Menus with Large Display
- Automatic Setpoint Switching
- Ascent Rate Display
- Battery Voltage Display w/Battery Low Warning
- Metric (Meters) and Imperial (Feet) Units
- Ultra-Bright OLED color display
Regulator and SPGs
The Megalodon rebreather uses the highly reliable and easily serviceable APEKS first stage
regulator. The two regulators each have an Over Pressure Valve installed in a low pressure port. Each
regulator has a 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 SPGs 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 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.
Harness and Air cell Options
The Megalodon rebreather provides standard 11-inch center mounting which accepts any standard backplate
and wing buoyancy control system. Many divers prefer the
ISC travel backplate and continous webbing harness with a Tetradon Wing. The Tetradon wing provides better
horizontal trim by adding more lift at the bottom end of the CCR and is rated at 50 pounds (22.67 kg) lift.
The wing does not interfere with access to the cylinder valves and
also provides a side mount anchor point for side mount systems.
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, Aerospace Lubricants Tribolube 71 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. Dive Gear Express also offers Megalodon instruction at our facility 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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