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The Sigma's advanced Dual Stabilizers, Triple Motors + Gyroscope allow it to clean like never before.
Manually control, schedule, and read advanced stats about each clean right from Sigma's app.
Advanced gyroscopic sensors allow Sigma to clean deeper than any other pool robot.
With Sigma's patented no tangle swivel, the robot can travel freely throughout your pool.
Clean small particles other robots cannot capture. Sigma includes the fine and NanoFilter™ cartridge sets.
Built on the ProLine™, Sigma's three motors are larger and boast the most power of any Dolphin robot.
As a Maytronics Authorized Dealer, we are proud to offer a full warranty on every Open Box and Refurbished robotic pool cleaner! This means that every robot has full coverage, just like a new one. It's an excellent way to save and find the best deal of the top pool robots!
Each robot includes a full manufacturer's warranty from date of your purchase.
Open box units have less than 10 hours on their motor! Refurbished robots will have slightly more hours, but less than 30 hours of use. Both Open Box and Refurbished units include a full manufacturer's warranty!
Every open box robotic pool cleaner has a full 30 day return policy, just like a new unit!
Every refurbished robotic pool cleaner has a full 30 day return policy, just like a new unit!
Yes, every Open Box and Refurbished robot sold by us is included in our 30 day Risk-Free Trial program!
Take whatever preconceived notions you may have about pool robots and throw them out. The all-new Sigma has set a new standard with unparalleled gyroscope technology and a powerful triple motor design. Now WiFi and app enabled.
Our most advanced filters yet. The Dolphin Sigma includes NanoFilters™ - as they are standard on all ProLine™ pool robots. These filters capture more than the standard filters on other robotic pool cleaners and are found only on the most powerful robots in the Dolphin product range.
Under the lens of a powerful microscope, the Nanofilter's micro-pore spun-bonded polyester fabric reveals a captivating tapestry of intersecting fibers. This intricate mesh allows water to flow freely while effectively trapping minuscule particles. With its deep pleats and impressive gunk-trapping capabilities, the Nanofilter stands out from the crowd. Furthermore, its pleated design offers a significant advantage—a larger surface area for capturing a greater volume of waterborne impurities, all while maintaining optimal water flow.
So what exactly makes the Dolphin Sigma the most progressive pool cleaner in the world? It’s rather simple. The ProLine™'s Sigma provides visionary mobility, inspiring design and a whole new focus on sustainability. The result is a technologically superior robotic pool cleaner. The absolute best warranty available and legendary Dolphin pool cleaner performance are standard. Discover new groundbreaking features that represent the current state of pool cleaner technology.
It’s the best Dolphin pool robot ever. It’s easy to see why the new Dolphin Sigma is the answer to the changing demands of pool owners everywhere as it redefines performance in a pool robot. With groundbreaking gyroscope technology, commercial grade motors, and a level of efficiency never seen before, the future has already begun. The newest Dolphin ProLine™ robot features not one, not two but three highly efficient, commercial grade DC motors for the most powerful suction and navigation ever in a robot.
Famous for a high ratio of torque to inertia, the DC motor can provide up to five time it's rated torque without stalling. The Sigma Dolphin pool cleaner utilizes not one, not two, but three onboad DC motors. The revolutionary 24 volt DC motors require 87% less energy than the AC motors that power old fashioned pool cleaners. Efficiency demands power. That was the principle then. And it still stands today. There was an opportunity to get more from less. To optimize the work input to work output. Enter the era of gyroscope enabled robotic pool cleaners.
Learn more at SigmaRobots.comIn a radical departure from ordinary cleaners, the Sigma pool cleaner was designed to clean all pool surfaces including the tile and waterline with pinpoint precision. For the first time ever, a consumer robot is equipped with an advanced Gyroscope to deliver precise control and positioning of the robot. While other cleaners fall from the wall, the all-new gyroscope and triple 3,000 RPM DC motor allows Sigma to remain firmly planted against the wall all the way to the top. Sigma Dolphin pool cleaners reaches every square inch of the pool as high speed spinning brushes handle difficult colonies of bacteria, algae, and biofilm. Sigma reaches deep inside pool corners, scrubs, and vacuums so you don't have to.
Yet again, everything comes back into play. It’s about a new benchmark. We are always looking forward. Not sideways, never back. We started from scratch. And we gave everything we got to make the newest Dolphin even better. Our goal was simple. To create the next Dolphin that can do more, deliver more and consume less power than ever before. The Sigma represents the future of the Dolphin brand. A fascinating future that shows what’s possible. Its design is completely new, but like that of every Dolphin that came before, it’s based on years of research and engineering. The all-new Sigma takes its place at the top of the Dolphin line and in the top echelon of its class.
There are few pool cleaners that are capable of cleaning your pool in a truly satisfying way. It started with a vision. A vision to completely reimagine what we expect from a robotic pool cleaner. Traditional cleaners have no brushes that contact the pool surface. We gave Sigma not one, not two, but four powerful brushes. Engineers gave Sigma dual spinning brushes that power scrub the pool surface and a third center CleanSweep™ brush that rapidly oscillates back and forth to dislodge stubborn contaminants. Together, the triple brush systems provides exceptional agitation and brushing performance.
In addition to vacuuming loose debris, the new Sigma really shines when it comes to difficult to remove contaminants like algae, bacteria, and biofilm that’s firmly attached to the wall of most pools. There are 21,000 known varieties of algae. Chances are, you’ve dealt with at least a few of them. Resistant to chlorine, biofilm is self-perpetuating and very difficult to remove. Traditional pool cleaners only pick up loose contaminants, leaving stubborn contaminants stuck to the pool wall. But the Sigma attacks stubborn contaminants at their core, thanks to its Dual NanoFilters™. Biofilms in swimming pools can and often do lead to cloudy water, algae blooms, scale build-up, and even corrosion.
Try any robot in your pool risk-free for 30 days. We believe a pool robot is an investment, and we know you'll love it. Which is why we have a 30 Day Free Trial. If you don't love it, simply return the robot. Unlike the other guys, we never charge a restocking fee or any other fees - meaning no restocking fee ever.
Here at Poolbots, we carry only the top models for the top brands. All of our pool robots are backed by a full manufacturer's warranty - not prorated or limited to cycles like other pool robots.
Easily transport your Dolphin Sigma with the Dolphin Universal Caddy. Fits any Dolphin Robotic Pool Cleaner.
Waterline Cleaning | Yes |
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Wall Climbing | Yes |
Dual Stabilizer | Yes |
Number of Motors | 3 |
Gallons Filtered Per Hour | 4500 GPH |
Filter Types | Ultra-fine and Standard Filter Cartridge sets |
Pool Coverage | Floor, Walls, Waterline |
Pool Types | In Ground |
Pool Size | 50 ft |
Pool Shapes | Rectangle, Oval, or Freeform |
Pool Surfaces | Concrete, Plaster, Gunite, Pebble, Tile, Vinyl Liner, Fiberglass |
Cable Length | 60 ft |
Anti-Tangle Swivel | Yes |
Obstacle Avoidance | Steps, Ladder, Drain Cover, Ledges, Pop-Ups |
Warranty | 3 Years |
Brand | Dolphin |
Manufacturer | Maytronics |
Part Number | 99991036-SPLI |
ASIN | B07CZ1XVZX |
Microsite | Visit Microsite |
No, we never charge a restocking fee ever! We know a robotic pool cleaner is a big investment, which is why we offer Free 30-Day Trials on all robotic pool cleaners!
As a proud Authorized Dealer for Dolphin, the Dolphin Sigma includes a full 3 year warranty from date of purchase.
No! The Dolphin Sigma is plug and play! All you need to do is unbox the unit and plug it into an outlet. No setup or assembly required!
With a main drain clip on, you can successfully avoid the robot getting stuck on your drain.
With a main drain clip on, you can successfully avoid the robot getting stuck on your drain.
The Dolphin Sigma is compatible with the following types of pools: In-ground pools, above-ground pools, gunite pools, tile pools, fiberglass pools, and viny pools of all shapes and sizes. If you have any questions or wonder if this is the right robot for you, contact us or view our Pool Robot Guide.
Want to compare Dolphin Sigma to other robotic pool cleaners? Read in-depth comparisons against all the top pool robots out there today. Can't decide? Live chat with our pool experts here
Learn more about the Dolphin Sigma on our review. Our in-depth pool robot reviews are written by our pool experts and will help you make an informed decision when purchasing a robotic pool cleaner for your pool. Read the Dolphin Sigma Review or browser other top robotic pool cleaner reviews.
I have the sigma (previously owned s300i) cleans great better than my old one. Was getting stuck on drains I called factory. I had to ship it to them (they paid for the return) the added a middle brush fixed the problem Shipping wasnt cheap but it was worth it
We have been unground pool owners for years so when I found this pool cleaner I was hopeful. This is the BEST pool cleaner we have ever had. So easy to use. There pool is so clean! You don't need to attach to the pool filter in any way. We just drop it in the pool and push start. I would highly recommend this cleaner. It's worth every penny
ROBERT WAS VERY HELPFUL IN IN THE SELL OF THIS PRODUCT
Bought this last season, and am extremely impressed. Came from a Tigershark, which did an OK job, but would get stuck too often in my pool. The Sigma has yet to get stuck once all last season and after about 10 uses this season. Powerful pumps, ripples the top of the water from 10 feet deep. Quick cleaning. Bluetooth is hard to use for spot cleaning, I just don't bother with it. It cleans my 20x40 foot pool in about 2.5 hours, no need to spot clean after. If it lasts another 2 seasons, I will consider it one of my best purchases for pool cleaning. Have not felt the need to manually vaccuum since I bought it. Highly recommend.
Great. Does not get hung up... Does a great job.
Learn more about Nanofilters™, MaxBin™, and so much more to find which pool robot is right for you. Use our Pool Robot Selector to enter your pool type and find an exact match for your swimming pool's needs or read the Best Dolphin Pool Cleaner for 2023.