Dolphin Sigma Robotic Pool Cleaner with Wi-Fi, Gyroscope, and Massive Top-Load Cartridge Ultra-Fine and Standard Filters, Ideal for Pools up to 50 Feet
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Features
- Hassle-free clean. Easy-to-use, robotic pool cleaner equipped with an anti-tangling swivel cable, allowing Sigma to move freely around large residential pools up to 50 feet with ease. Backed by a 3 year quality assurance.
- No messy bags to clean. Massive top-loading cartridge filters captures and traps fine and ultra-fine debris for an optimal clean swimming pool. Includes both Ultra-Fine and Standard Filter Cartridges Sets.
- Powerful, dual scrubbing brushes thoroughly and efficiently attacks tough contaminants removing algae and bacteria from floor, walls and waterline for a deep clean in 2.5 hours.
- Just say when. Set Sigmas advanced weekly scheduler to automatically clean for you schedule each day independently or simply run daily, 2x per week, or 3x per week. Connect your Sigma to your smartphone using Wi-Fi to spot clean when needed and view pool stats right from your phone.
- Smart Navigation. Advanced navigation and scanning software ensures your pool is cleaned using the most efficient route without letting obstacles get in the way.
Brand: Dolphin
Model Name: Sigma
Material: Plastic
Color: Blue
Product Dimensions: 23"L x 19.1"W x 13.8"H
Power Source: Battery Powered
Other Special Features of the Product: Self Propelled
Control Method: Remote
Voltage: 24 Volts
Efficiency: Efficient
Battery Description: Lithium-Ion
Number of Lithium-ion Cells: 8
Engine Type: Electric
Load Capacity: 25 Pounds
Item Dimensions L x W x H: 23"L x 19.1"W x 13.8"H
Item Weight: 35 Pounds
Hose Length: 50 Feet
Material Type: Plastic
Product Care Instructions: Clean or replace the top-loading filters regularly. Avoid immersing the device in liquids other than water and do not use abrasive materials for cleaning.
Brand Name: Dolphin
Model Name: Sigma
Model Year: 2024
UPC: 724131498160
Manufacturer: Dolphin
Required Assembly: No
Warranty Type: Standard
Installation Type: Portable
EU Spare Part Availability Duration: 3 Years
Color: Blue
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To initiate a return, please visit our Returns Center.
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Top Amazon Reviews
I made the initial purchase of the Dolphin Premier through Terra Direct. The transaction was very smooth and shipping was quick. After running the Premier through its paces for almost a month, I wasn’t quite satisfied with the performance. It seldomly climbed the walls which is an important feature on my checklist. My pool is a 20k Pebble Tec with balanced chemistry. The pool was given a thorough brushing and it still will seldomly climb the walls. It also seemed sluggish moving around the pool. Filters were cleaned after each use (used the nano and standard fine filter). Didn’t have much use for the leaf filter although it has a very impressive capacity. After I gave the Premier what I thought was a fair chance, I reached out to Terra Direct for suggestions. They quickly responded and suggested the Dolphin Sigma which is considered an upgrade for the difference of around $100 USD at the time of writing. They confirmed there will be no restocking fee and the warranty is longer for the Sigma. After returning the Premier and receiving the Sigma, I immediately noticed a huge difference in power and cleaning capability with the extra commercial-grade motor. It also climbed the walls and did so very frequently and with much power. The app functions well and I mostly use it to manage the cleaning schedule or to start additional cleanings if needed. I tested the remote-controlled manual feature and it worked as expected (there’s latency, but it’s usable). I purposely didn’t brush a section of my pool wall to test the cleaning capability and I was satisfied to see how well the Sigma scrubbed the buildup. I was also impressed at how much dirt was captured in the nano filters. Accessing the filters is much easier vs the Premier since it’s top loaded on the Sigma. One thing to point out is if you’re using the nano filters, clean them after every use. If your pool is clean, you can get away with two passes max. Dirty nano filters will cause a significant pressure/suction drop and the Sigma will not climb or partially climb the walls. All you need is a garden hose with a spray nozzle and the dirt will be washed right off. It only takes about 5 minutes. Lifting the Sigma out of the water can be on the heavier side if you attempt to lift it directly out of the water but if you lift it to the top of the water, grab it by its handle, take advantage of the buoyancy and gradually let it drain before fully pulling it out of the water, it will make things easier. Lastly, it will not clean tanning ledges, although I’ve seen it climb stairs. You will still need to brush off the ledges and stairs but in the grand scheme of things, that labor is minor compared to the time and money you will spend on hired pool help. In summary, the Sigma has passed my critical expectations and I’m completely satisfied in this investment which will pay itself off in less than a year. But most importantly, the time saved and to be saved in the future is priceless. I hope this review gives you the confidence to purchase the Sigma and saves you time and possibly money with trial and error/restocking fees.
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Reviewed in the United States on June 23, 2024 by prime.all.day.everyday
I bought the Dolphin Sigma in 2023 and it feels like it has been in the shop as much as the pool. It initially started out okay with quick and easy setup. Cleaning was adequate if not exceptional. Unfortunately, started to have issues with loss of power to the machine. You can forget about talking to anyone to assist and any response you get will be over emails. It had to be sent in for repairs and Maytronics requires the buyer to pay for shipping, which is north of $100. Also, this process will take at least two weeks. Reportedly was the cable. It worked for a few months and then exact same issue. It went pack to the shop for repairs. This time reportedly was the power supply box. It again worked for a few months and again stopped working. This time it thinks it is out of the pool despite it is not. I have emailed/submitted report to Maytronics but as of this writing still no response. I'm done with this machine. The expensive, lack of support and only adequate cleaning is not worth the hassle. Save yourself the headaches.
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Reviewed in the United States on November 18, 2025 by Robert Forrest
I am one month in on this cleaner and so far I am very impressed. This is my fourth pool cleaner that I have purchased in my 22 years of having my pool. My last cleaner was a dolphin Triton Ps plus. It gave up about three months out of warranty .It was an adequate cleaner but lacked suction and it’s maneuverability was clumsy. The sigma excels where the triton just could not. I have a 18 x 36 pool with a deep end of 8 ft. When the cleaner is at the deepest part of the pool you can see the water stirring on the surface . It really has a tremendous amount of suction. It climbs the walls very well and does and excellent job of cleaning the water line. It does get caught on my main drain from time to time but so has every cleaner that I have owned. The filters hold a lot of debris and they are simple to clean. I have many trees around so my pool can accumulate quite a bit of trash on the bottom. The sigma seems to have to pool clean about half way through its cycle ,which with the other cleaners I have had it usually took two. The other cleaners I have owned ,the cable would get twisted and impart the unit. So far I have had no tangles with the sigma. Very easy to use , just put it in and push the button. The controls from the app are pretty good. There is a little lag between the phone and the cleaner but it doesn’t take much time to get used to it. I had this feature on my last cleaner and never really used it. This is the heaviest cleaner I have had but my wife doesn’t seem to have a problem pulling it up out of the pool. I do recommend getting a caddy for it. It will make storage and movement much easier. It also helps protect the brushes from getting damaged. I would highly recommend this cleaner from my experience so far. Hopefully it will last longer than my last one.
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Reviewed in the United States on March 21, 2023 by Amazon Customer