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Choose from top models from the top brands.

Free 1-2 Day Shipping. Low Price Guarantee. Easy Returns/Exchanges.

Choose from top models from the top brands.

Free 1-2 Day Shipping. Low Price Guarantee. Easy Returns/Exchanges.

Choose from top models from the top brands.

  • Dolphin Sigma Pro Line Pool Robot
  • Dolphin Sigma Power Supply
  • Dolphin Sigma Waterline Cleaning
  • Dolphin Sigma High Capacity Filters
  • Dolphin Sigma 3 Year Warranty
  • Dolphin Sigma Gyroscope
  • Dolphin Sigma SmartNavigation
  • Dolphin Sigma Dual Filters
  • Dolphin Sigma Quad Scrubbing Brushes
  • Dolphin Sigma Triple Commercial Grade Motors
  • Cleaning Sigma's Filters
  • Dolphin Sigma In Swimming Pool
  • Dolphin Sigma Robotic Pool Cleaner

Dolphin Sigma Review

Dive into how the Nautilus CC Plus performs, its features, what's included, and how it works in our in-depth review.

What You Need To Know About The
Dolphin Sigma

  • Includes NanoFilters™ - Captures small debris other cleaners miss
  • Waterline Cleaning - Cleans the pool floor, wall, & waterline
  • Triple Commercial Grade Motors - 3 ProLine Motors filter 4500 GPH+
  • myDolphin Plus App - Schedule and clean the Sigma from anywhere
  • Gyroscope - Gyroscopic sensors control and monitor every movement
  • 3 Year Warranty - Longest warranty available

What features does it have?

Dolphin E70 Waterline Cleaning
Dolphin Explorer E70's Waterline Cleaning

Waterline Cleaning

The Dolphin Sigma has waterline cleaning. This is an essential feature that you'll want when looking for a pool robot. It allows the robot to climb and reach the dirtest part of your swimming pool. Without this feature, you'll likely still need to manually clean your waterline by hand with a brush. It is one feature that you'll need and we're glad it is included with the Dolphin Sigma.

Wall Climbing

Clean like a pro. With wall coverage, the Dolphin Sigma can clean and scale your walls with precision and power. While Wall Climbing is a great feature, don't get this confused with the superior waterline cleaning feature.

What is Dolphin Sigma missing?

Leaf Bag

Dolphin Premier Leaf Bag
Dolphin Premier's EXCLUSIVE Oversized Leaf Bag

With leaves being a common issue, it would be safe to assume most pool robots utilize a leaf bag. Well, no so fast. Nearly every robotic pool cleaner is missing a leaf bag, except the Dolphin Premier. If you have a lot of leaves, this is the best pool robot for leaves. Not to mention the Premier's 3 year warranty, Dual Commercial Motors, and Multi-Media™ make it one of the best models of 2023.

What's included with the Dolphin Sigma?

The Dolphin Sigma includes everything you'll need. Here is what is included with the unit:

  • Dolphin Sigma Unit
  • 60 ft Cord with Anti-Tangle Swivel
  • Programmable Weekly Timer
  • Ultrafine NanoFilter™ Filters
  • Standard Mesh Filters
  • 3 Year Warranty

How to set up the Dolphin Sigma

Simply plug and play. All robotic pool cleaners are ready to go right out of the box. No booster pump or assembly needed. The Sigma has everything needed to get started in its box. It's that easy.

Why Poolbots?

No one else knows robotic pool cleaners better than us. Having been in the swimming pool industry for over 25 years and a Dolphin Authorized Dealer, we are proud to offer a full warranty on every robot. We also offer a risk-free 30 day trial on every robot. We understand that finding a robot can be hard, so hopefully this review helps you make an informed decision when finding your next pool cleaner.

Need help? Reach out to us. Our pool experts are standing by ready to help find the perfect pool robot for your swimming pool.

Compare Dolphin Sigma

Compare the Dolphin Sigma to other top robotic pool cleaners like the Dolphin Premier. Want to compare the Dolphin Sigma to more robotic pool cleaners? Head over to our compare page.

Dolphin ProLine
Dolphin Logo Sigma Premier
Cleans Waterline Yes Yes
Yes Yes
Leaf Bag
Dual Stabilizer Yes Yes
Gyroscope Yes
3 Year Warranty Yes Yes
No Restocking Fee Yes Yes
30 Day Trial Yes Yes
Shop Now Buy Buy

Sigma's Top Features

Waterline Cleaning

The Sigma's advanced Dual Stabilizers, Triple Motors + Gyroscope allow it to clean like never before.

Dolphin Smart Power Supply

Smartphone App

Manually control, schedule, and read advanced stats about each clean right from Sigma's app.

Dolphin Sigma Gyroscope


Advanced gyroscopic sensors allow Sigma to clean deeper than any other pool robot.

Dolphin Anti-Tangle Swivel

Anti-Tangle Swivel

With Sigma's patented no tangle swivel, the robot can travel freely throughout your pool.

Dolphin NanoFilter Cartridges


Clean small particles other robots cannot capture. Sigma includes the fine and NanoFilter™ cartridge sets.

Dolphin Triple Commercial-Grade Motors

Triple Commercial-Grade Motors

Built on the ProLine™, Sigma's three motors are larger and boast the most power of any Dolphin robot.

Dolphin Sigma Specifications

Waterline Cleaning Yes
Wall Climbing Yes
Dual Stabilizer Yes
Number of Motors 3
Gallons Filtered Per Hour 4500 GPH
Filter Types Ultra-fine NanoFilters 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
Microsite Visit Microsite

Compare Dolphin Sigma

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

Try Risk-Free for 30 Days

Buy with Confidence

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.

Sigma Accessories

Dolphin Universal Caddy

Easily transport your Dolphin Sigma with the Dolphin Universal Caddy. Fits any Dolphin Robotic Pool Cleaner.

Read Our Reviews

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.

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Pool Robot Buying Guide