NanoFilter™ Technology
Sigma's top-loading NanoFilter cartridges are rated down to 2 microns. This micro-pore spun-bonded polyester fabric removes small particles that pass through standard and fine filters.
Explore NanoFiltersDolphin ProLine®
With NanoFilters, Waterline Cleaning, and more, these top of the line robotic pool cleaners automate your pool cleaning with commercial-level power. From NanoFiltration™ to No Restocking Fees, see the difference. Try today in your pool for 30 days.
Explore the ProLine™ difference
SmartNav 3.0 Navigation
Gyroscope guided SmartNav 3.0 Robotic Scanning calculates the optimal pattern for your pool, so every inch is reached without aimless wandering or overlapping paths.
Smarter Navigation
Waterline Cleaning
Triple commercial-grade motors, an onboard gyroscope, and quad scrubbing brushes help Sigma clean your walls and waterline with power and precision.
Best Waterline Cleaning RobotNext gen cleaning
The 2026 Dolphin Sigma
Meet Sigma, the pinnacle of ProLine™ innovation. We started from scratch, and we gave everything we've 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 result combines all the advanced features you expect from a Dolphin ProLine™ pool robot and so much more: an onboard gyroscope, triple commercial-grade motors, quad scrubbing brushes and the myDolphin Plus app. The all-new Sigma takes its place at the top of the Dolphin line and in the top echelon of its class.
The NanoFilter advantage
Capture What Other Filters Don't
Experience a new level of clean. Crystal-clear water has never been easier. Powered by three commercial-grade motors and NanoFiltration™, the Dolphin Sigma unlocks a deeper clean.
Through a process called sieving, these high-spun polyester filters are engineered to clean deeper than standard Dolphin mesh filters. Allowing you to get back to what is important, enjoying your pool.
Buy direct
Shop the ProLine™.
Today's prices on every ProLine™ robot, with free shipping, a 30 day trial and no restocking fees on each one.
Dolphin Sigma
$2999 $2349 SALE Save $650
The pinnacle of ProLine™ innovation. Brand new 2026 Dolphin Sigma with gyroscope, triple commercial-grade motors, quad brushes, NanoFilters™ and the myDolphin Plus app.
Dolphin Premier
$2499 $1949 SALE Save $550
Elevate your pool maintenance with the Premier's advanced cleaning technology. Smart navigation and powerful scrubbing brushes ensure your pool stays spotless with minimal effort.
Dolphin Quantum
$1999 $1599 SALE Save $400
Experience the ultimate in pool cleaning with the Quantum's ProLine™ performance. Featuring XXL MaxBin™ and NanoFilters™, this 2026 model delivers unmatched cleaning power.
Massive top-loading cartridges
The Largest 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.
The new Dolphin SnapLoc™ Filters make robot cleaning easier than ever. Each side simply snaps apart for quick and easy cleaning.
Two filter sets included
Ready for Every Clean
Sigma includes, not one, but two filter sets: Standard Filter and Ultra-Fine NanoFilter. 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.
Gyroscope enabled navigation
Smart, Efficient Robotic Navigation
Gone are the days of watching your robot aimlessly wander around your pool. The new Sigma is equipped with SmartNav 3.0 Robotic Scanning to ensure that every inch of your pool surface is reached.
With its remarkable gyroscopic control system, the Sigma knows where it has and hasn't been to avoid overlapping cleaning paths and minimize cleaning time. With the ability to sense ladders and drains, Sigma won't get hung up like ordinary cleaners.
No restocking fees
30 Day Trial
Your robotic pool cleaner is an investment. While other robots may have a 15% or higher restocking fee, you never have to worry with any ProLine Robot. There are never any hidden or pesky fees, so you can get back to what is really important: a clean and healthy pool.
With a longer 3-year warranty and 30 day trial, try the Dolphin Sigma in your own pool. If you're not completely satisfied, return it.
New
Dolphin Sigma Robotic Pool Cleaner
$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 Guarantee
NEXT STEPS
Try Sigma in Your Pool for 30 Days
Every 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.
