Making the impossible possible
Redefine how you clean. Sigma's larger commercial-grade motors and advanced software deliver a new level of clean. Learn why so many pool owners are making the switch to Dolphin's best pool robot.
Sigma's triple commercial-grade motors, gyroscope, and quad scrubbing brushes power it over any obstacle. Its Dual Stabilizer and climbing rings help Sigma clean your walls and waterline with power and precision.
Best Waterline Cleaning Robot
Four separately controlled brushes spin independently for the most precise navigation ever, scrubbing away the algae and biofilm other robots simply pass over.
Best Scrubbing Pool Robot
Control your Dolphin from anywhere. Sigma can be scheduled, programmed, and operated from anywhere. Dolphin Sigma even records your cleaning history with stats such as gallons filtered, the percent of pool cleaned, and more.
Most Advanced Cleaner Yet
Leaves? Algae? No problem. The Dolphin Sigma includes not one, but two, Oversized Filter Cartridges. Sigma's Ultra-Fine filter even enables it to clean down to 2 microns.
Best Pool Robot for Algae
The art of waterline cleaning
The Dolphin Sigma not only cleans the floors and walls of your pool, but focuses on the waterline. This is where 99% of bacteria, biofilm, and algae build up in a swimming pool. While most robotic pool cleaners only vacuum up loose debris, the Dolphin Sigma powerfully cleans all surfaces with its advanced Dual Scrubbing Brushes.
Leading the pack.
The Dolphin Sigma is the leader in waterline cleaning. Thanks to its dual stabilizer, dual split scrubbing brushes, and gyroscope, Sigma adheres to the wall and waterline better than any other robotic pool cleaner.
While other pool robots may have waterline cleaning, these features enable the Dolphin Sigma to clean better than ever before. The Dolphin Sigma's SmartNav 3.0 allows Sigma to even detect obstacles such as a beach entry, stairs, and more.
Advanced sensors
Dolphin Sigma's gyroscope is a breakthrough in robotic pool cleaner technology, sending advanced data to its microprocessor. This allows Sigma to know its exact position and movement.
Its gyroscope uses this data to fine tune its cleaning ability and provide advanced movement throughout the swimming pool. Just another reason why the Dolphin Sigma is our best pool robot yet.
PowerClean quad scrubbing brushes
Virtually any pool cleaner can vacuum loose debris, but it takes a special type of robot to remove contaminants that adhere to the pool surface. Traditional cleaners merely pass over difficult to remove pathogens, leaving them fully intact. The Sigma robot was engineered from the ground up to deep clean.
Scrub and vacuum like never before
Achieve a deeper clean with Dolphin Sigma's quad brushes. Designed to scrub and agitate dirt and algae from every surface, these four powerful brushes ensure no grime is left behind.
PowerClean™ is especially effective against biofilm, a structured community of microorganisms that increases chlorine demand, destroys water quality, and frustrates pool owners.
Maximum agility
Four separately controlled brushes spin independently for the most precise navigation ever. Sigma has the unique ability to spin one side forward and one back, for maximum agility.
Riding on HyperGrip continuous tracks, Sigma glides smoothly over obstacles like drains and is capable of climbing straight up vertical walls.
myDolphin Plus app
With the Dolphin Sigma's Connect Anywhere technology, you control, schedule, and clean with the Dolphin Sigma from anywhere. Easily connect Sigma to Wi-Fi and sit back and relax while Sigma cleans your pool for you.
With a press of a button
Stay connected with Dolphin Sigma's Wi-Fi capability. Effortlessly control and monitor your pool cleaner from anywhere using your smartphone or tablet. Schedule cleanings, check status, and receive updates with the convenience of Wi-Fi connectivity.
More control. More features.
The Dolphin Sigma takes the myDolphin Plus App a step further. Instead of simple control like other Dolphin Cleaners, Sigma has Advanced Scheduling, which allows you to program and run Sigma for each individual day. Want to run Sigma at 5pm on Friday night, then clean at 2pm Saturday? No problem.
Sigma even lets you manually control and navigate it, a feature not found on all Dolphin robots. This lets you drive and navigate Sigma around your pool.
Keep track of each clean
Sigma records and tracks every single time your pool robot cleans. With this added capability, Sigma shows the gallons filtered, distance traveled, energy saved, and so much more.
Alongside that, Sigma can even connect to Siri. Simply set up voice control and say "Hey Siri, Start cleaning my pool" and Dolphin Sigma will get to work.
Our largest cartridge ever.
The Dolphin Sigma not only cleans the floors and walls of your pool, but focuses on the waterline. This is where 99% of bacteria, biofilm, and algae build up in a swimming pool. While most robotic pool cleaners only vacuum up loose debris, the Dolphin Sigma powerfully cleans all surfaces with its advanced Dual Scrubbing Brushes.
The largest cartridge ever in a pool robot
The new Sigma's filtration system is so large, easy and convenient, you'll never consider messy, cumbersome debris bags again. With the new Sigma, Dolphin introduces a new massive cartridge with the highest capacity ever recorded on a pool robot.
Quick and easy cleaning
Previous generation cartridges made debris removal nearly impossible with small cavities that trapped small debris and fine dirt. Consider this problem solved. The new Dolphin SnapLoc™ Filters make robot cleaning easier than ever. Each side simply snaps apart for quick and easy cleaning.
Ultra-fine. Ultra clean.
Sigma includes, not one, but two filter sets: Standard Filter and Ultra-Fine Filter. This enables Sigma to clean deeper than ever before. Swap filters out in seconds to customize each clean, allowing you to pick up even the most stubborn algae and leaves.
New
$2999 $2349 SALE Save $650
The New Sigma. Expect More. The 2026 Dolphin Sigma sets the new standard with an onboard gyroscope, triple commercial-grade motors, quad scrubbing brushes, NanoFilters™ and the myDolphin Plus app. Backed by a 3 year warranty and a 30 day in-pool trial.
Free 1-3 Day FedEx Shipping
3 Year Warranty Included
30 Day Trial & No Restocking Fees
Price Match GuaranteeEvery pool deserves an intelligent robot.
Take Sigma home and try in your own pool for 30 days. If you're not 100% satisfied, simply return it.
