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Mares Genius Computer Black/Black with LED Tank Module

Mares  |  SKU: 495125
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Product Information

The Mares Genius Scuba Dive Computer with LED Tank Module is an air-integrated wrist computer built on the ZH-L16C (Bühlmann) algorithm with editable gradient factors, predictive multigas support for up to five gases, and a built-in digital compass. Paired with the optional LED Tank Module (model 414139/414319), an EN 250 certified wireless transmitter, it adds hose-less tank pressure monitoring through a color-coded LED display.

Who it is for

This setup suits divers running Nitrox and Trimix profiles with planned gas changes who want a single wrist computer to manage Air, Nitrox, Trimix, and Gauge modes plus recreational (R0-R3) and technical (T0-T3) presets. The Decompression Dive Planner and Bottom Time mode support dive planning before getting in the water, and the LED Tank Module lets a diver check tank pressure at the surface or during the dive without reading a hose-mounted gauge.

Key details

  • Algorithm: ZH-L16C with editable gradient factor and predictive multigas, managing up to 5 gases with auto-recalculated decompression when gas mixes change
  • Display: 2.7" color TFT LED display with brightness adjustment, Night Mode, and a graphic tissue-saturation display
  • Depth display to 492' (150 m); altitude adjustable up to 12,100' (3,700 m)
  • Memory for 1,000+ hours of diving; built-in Bluetooth for sync with the MySSI app
  • Digital compass with multi-position reading, directional memory, and stopwatch; tilt up to 80 degrees
  • Rechargeable lithium-ion battery, tool-free charging, rated for approximately 40 hours of dive time per charge
  • LED Tank Module (model 414139/414319): EN 250 certified, transmitter range 0 to 5000 psi (0 to 350 bar), 7/16" threaded HP port, user-replaceable CR123 battery; computer pressure display up to 4350 psi (300 bar)
  • LED gas-level indicators: green above 2600 psi, yellow at 1450 psi, red below 500 psi.

Compatibility and sizing

The LED Tank Module pairs wirelessly with the Mares Genius computer for air integration; air integration itself requires this optional transmitter, as the computer does not display tank pressure on its own.

DiveCatalog.com is an authorized Mares dealer and a dive shop in Irvine, California since 2003. Call or chat with us if you have questions about fit, gas-change setup, or pairing the LED Tank Module to your Genius computer.

⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Frequently Asked Questions

Why do I need my own dive computer?

A dive computer tracks the actual depth and time profile you have dived and the tissue loading that follows from it, which is personal to you. A rented computer has no record of your recent diving, and swapping models each trip means relearning the display and menus when you should be focused on the dive. Owning one you know well is a genuine safety and comfort improvement.

Can two divers share one dive computer?

No. A computer only tracks the profile of the diver actually wearing it, and even buddies who stay together do not follow identical depth and time profiles. Every diver needs their own computer, and passing one between divers or between dives is unsafe.

What does conservatism mean on a dive computer?

Conservatism settings make the computer's calculations more cautious, shortening allowed bottom times and adding margin beyond the base algorithm. Divers commonly add conservatism for factors such as cold, hard work, fatigue, or repetitive multi-day diving. How and when to adjust it is covered by your training and your computer's manual, so set it before you get in the water and follow what your computer tells you during the dive.

What kind of battery does a dive computer use?

Broadly there are two types: user-replaceable batteries, often a coin cell that you or a shop swap along with resealing an o-ring, and sealed rechargeable batteries that charge from a cable or dock. Neither is universally better, as replaceable cells are convenient on remote trips while rechargeables avoid ever opening the case. Follow the manual exactly for any battery change, because an improperly seated o-ring or case is the usual cause of a flooded computer.

Do I need to do anything special for altitude diving or flying after diving?

Yes, both change the picture, and both are governed by your training agency's guidance and your computer's instructions rather than any casual rule of thumb. Many computers have an altitude setting that must be configured before diving at elevation, and most display a no-fly or surface-interval countdown after a dive. Follow your computer and your training, and ask a dive professional or a dive-medicine specialist if you are unsure.

How do I care for a dive computer?

Rinse it in fresh water after every dive day, paying attention to the buttons and around any sensor openings where salt crystals form, and let it dry fully before storing. Keep it out of prolonged direct sun and extreme heat, and avoid pressing buttons while sand is on the case. Inspect the strap or bungee often, because a failed strap loses far more computers than a failed computer does.

What is the difference between wrist, console, and air-integrated dive computers?

A wrist computer is worn like a watch and read by raising your arm, while a console computer sits at the end of a hose with your other gauges. Air integration means the computer also displays cylinder pressure, either through a hose or from a wireless transmitter on the first stage, and often estimates remaining gas time. All of them run a decompression algorithm, so the real difference is where you read the information and how much of it you get.

How long does the Mares Genius battery last per charge?

The Mares Genius uses an integrated rechargeable lithium-ion battery rated for approximately 40 hours of dive time per charge. It charges with a tool-free connection, so there is no need to open the device to recharge between dive days.

Do I need the LED Tank Module to get air integration on the Genius?

Yes. The Mares Genius computer does not display tank pressure on its own; air integration requires pairing it with an optional transmitter such as the LED Tank Module (model 414139/414319), which sends pressure data wirelessly for a hose-less display.

What do the LED Tank Module's colors mean?

The module shows green above 2600 psi, yellow at 1450 psi, and red below 500 psi for a quick color-coded read on remaining gas.

What battery does the LED Tank Module use?

The LED Tank Module runs on a user-replaceable CR123 battery, separate from the dive computer's rechargeable battery. This lets a diver swap the transmitter's battery directly rather than sending it in for a recharge.