The Dolphin Sigma is the latest of Maytronic’s line of robotic pool cleaners to hit the market. Although it may be too early to tell, the Dolphin Sigma may, in fact, be the best robotic pool cleaner out there thanks to its numerous additional features not available in many of its predecessors. Let’s take a closer look at what the Dolphin Sigma is packing.

Dolphin Sigma Robotic Pool Cleaner Review

SmartNav 3.0 Scanning and Mapping

Most Dolphin brand pool cleaners rely on SmartNav navigations system to scan and map the layout of a pool. The Sigma is no different, but it uses the latest and greatest version – SmartNav 3.0 – to create an almost-perfect digital layout of your pool, which the robot uses to create the most efficient cleaning pattern.

This, combined with the built-in gyroscopic navigation system, gives the robot a greater awareness of its surroundings and allows the robot to move more freely to better tilt, turn, and crawl along all surfaces of your pool.

Triple 24V DC Motors

The Sigma is the first robotic pool cleaner to use not one, not two, but three 24V DC motors. By packing such power in underneath its stylish hood, the Sigma is arguably the most powerful pool cleaner out there.

Dolphin Sigma Robotic Pool Cleaner

The triple-motor setup allows the Sigma to move quicker and move over several different obstacles without getting stuck in its tracks. Plus, the motors working in tandem increase its suction power, thereby improving cleaning performance far beyond what you can expect from other Dolphin models.

HyperGrip Rubber Tracks

If you’re wondering where the Sigma’s wheels are, you can forget about it. The Sigma, like so many other premium robotic pool cleaners, rely on tracks to travel on slippery pool surfaces.

But the HyperGrip Rubber Tracks are unique in a way – the tracks operate independently of one another. The Sigma can turn around on the spot without backing up by directing each track to turn in opposite directions simultaneously.

Dual Active Brushes

Although the Sigma is noted to have “dual” brushes, it actually has four – two in the front and two in the rear. Each brush, like the rubber tracks, work independently of each other for better cleaning performance in every direction.

Dolphin Sigma Review

The high-RPM rate of the brushes pull in dirt and algae from the walls and base of your pools, leaving them squeaky-clean after a full 2-1/2 hours of cleaning.

Dual Oversized Filter Cartridges

The Sigma seems to have everything in multiples, including oversized filters. On top of the Sigma are two large filter cartridges that separate large from fine debris. Their extra-large size allows the robot to carry more algae, dead leaves, and grains of sand than any other Dolphin-made robot.

Best of all, since the cartridges are on top of the robot rather than on its belly, accessing them to remove pool gunk is easier than ever.

Programmable Timer

If you’re not at home, you won’t need to worry about coming back to an algae-filled pool. The Sigma has a programmable timer that lets you set up its cleaning schedules. The schedule is limited to daily, biweekly, and triweekly, but it’s better than nothing!

Dolphin Sigma

360° Swivel Cord

Maytronics has perfected their robots’ maneuverability by including a 360° swivel cord. As you can imagine, the cord can twist in a full-circle without fraying the inner wires, giving the robot the ability you twist and turn as it likes.

Now, that’s not to say the technology doesn’t have its faults – the cord isn’t 100% foolproof, and the Sigma can end up turning around in one spot endlessly. However, these occurrences are rarer than a solar eclipse.

Bluetooth Connectivity

Most robotic pool cleaners come with a basic remote control but not the Sigma. Instead, you have two alternatives; the first of which is using the downloadable smartphone app, MyDolphin.

The other way of managing cleaning schedules and manually controlling the Sigma is by connecting it via Bluetooth to your gadget. Bluetooth connectivity is great for those whose pool areas are not covered by Wi-Fi.

Dolphin Sigma Robotic Pool Cleaner

Spotty Stair Cleaning

The biggest issue most pool owners have is their robot’s inability to clean stairs, and this is also true with the Dolphin Sigma. It can clean other areas of a 50-foot pool without a hitch, but as soon as it sees pool steps, its navigations system goes haywire.

Lack of Caddy

Not having a caddy may not be the end of the world, especially for those who plan on leaving the Sigma in the pool 24/7 for scheduled cleaning purposes, but it’s definitely worth mentioning.

The caddy is mainly used to simplify the task of transporting and storing the unit when not in use. There is a silver lining: the Sigma is compatible with most of Maytronics’ caddies (sold separately).

Related Dolphin Robotic Pool Cleaner Articles
Single Reviews
Dolphin Nautilus CC Plus Robotic Pool Cleaner
Dolphin Premier Robotic Pool Cleaner
Dolphin Oasis Z5i Robotic Pool Cleaner
Dolphin Proteus DX3 Robotic Pool Cleaner
Dolphin Sigma Robotic Pool Cleaner

Comparison Articles
Dolphin vs. Polaris
Dolphin Premier vs Oasis Z5i
Dolphin Sigma vs. Dolphin Premier


From our review, it’s clear that we are head-over-heels in love with the Dolphin Sigma. What’s not to love? The navigation system is smarter than ever, and it creates an almost picture-perfect digital map of your pool, so it never misses a spot or makes repeated passes over the spot in the same cleaning cycle.

The Sigma, however, doesn’t perform all that well on stairs, but no robot is perfect. So if you have a 50-foot pool that needs regular cleaning, think of the Dolphin Sigma.

Dolphin Sigma Robotic Pool Cleaner Review

Our Recommended Robotic Pool Cleaners
Best of the Best! "Budget" Pick Also Great
DOLPHIN Nautilus CC Supreme Automatic Robotic Pool Cleaner- The Next Generation of Pool Cleaning with WiFi for Control from Anywhere, Ideal for Swimming Pools up to 50 Feet Dolphin Nautilus CC Plus Automatic Robotic Pool Cleaner with Easy to Clean Large Top Load Filter Cartridges and Tangle-Free Swivel Cord, Ideal for In-ground Swimming Pools up to 50 Feet. DOLPHIN Oasis Z5i Robotic Pool Cleaner with Bluetooth Control for Stress Free Pool Cleaning, Ideal for In-ground Swimming Pools up to 50 Feet.
Dolphin Nautilus CC Supreme Dolphin Nautilus CC Plus Dolphin Oasis Z5i
 • In-ground Swimming Pools
 • Pool Size: Up to 50 ft.
 • 1,5 | 2,5 | 3,5 hrs Cleaning Time
 • WIFI Connectivity
 • Twin Cartridges - Extra Large
 • In-ground Swimming Pools
 • Pool Size: Up to 50 ft.
 • 2 hr Cleaning Time
 • -
 • Twin Cartridges - Large
 • In-ground Swimming Pools
 • Pool Size: Up to 50 ft.
 • 2,5 hr Cleaning Time
 • Bluetooth Connectivity
 • Twin Cartridges - Extra Large

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