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ROBOVATIONS/CLASSIFICATION RECORD/ROBOT POOL CLEANERSRELEASED 2026REASSESSED 2026.06.11
Maytronics

Dolphin Sigma

Gyroscopic mapping puts the Sigma in systematic-path territory for a corded pool cleaner. Floor, walls, and waterline coverage is documented. The trade-off is the power cord and the filter-basket cadence that comes with heavy-debris pools.

Dolphin Sigma
FIT CHECK

Will the Dolphin Sigma work in your pool?

Describe your pool using the controls. Each choice reads the spec sheet for you, flagging where the Dolphin Sigma is built for your space and where it isn’t.

Pool type

Pool size

Debris load

Coverage you want

A classification of fit for the conditions you set — not a recommendation. Verdicts describe engineering design intent, not test results.

SPECIFICATION

The full spec sheet.

Priced above the category median, with every figure charted against the category below.

16.04 in16.73 inTOP10.3 in16.73 inSIDEDimensional drawing
Key specificationsManufacturer-published
Footprint
16.04 × 16.73 in · 10.3 in tall✓
Weight
24.63 lbs✓
Mapping & navigation

Gyroscopic mapping with systematic floor-wall-waterline path

Where it lands · ranked across 61 robot pool cleanersThis robotMedianTypical range
Runtime150min
90 min1,200 min
Bottom of range
Price$1,599
$290$4,250
Near median
Weight24.63lbs
7.9 lbs34.5 lbs
Above median

Position shows where the figure sits across the tracked category — not a quality judgment.

Official referencesManufacturer support
OWNERSHIP

Living with it.

Established corded platform with consistent coverage; filter basket durability is the primary owner complaint.

Owner reports describe reliable wall-climbing and consistent waterline pass completion. The most commonly documented issue is filter basket seal wear over multiple seasons, leading to debris bypass. Drive track wear is reported after two or more years of regular use.

Owner effort~40 minhands-on per month
Consumables$80replaceable parts / yr
Reliability trend Stableowner-reported arc
What goes wrong · 4 documented · 0 self-recover
Common
Cable tangle on stepsCycle interrupted, manual untangling needed
Owner fixReposition power supply; uncoil cable before each cycle
Occasional
Filter basket seal wearDebris bypasses filter, clouds pool
Owner fixInspect seal each season; replace basket assembly when worn
Occasional
Drive track slippage on curved wallsIncomplete wall coverage, missed waterline sections
Owner fixInspect tracks for debris buildup; clean weekly in heavy-debris pools
Rare
Power supply unit faultUnit inoperable until replaced
Owner fixContact Maytronics support; power supply is replaceable as a standalone unit
Upkeep routine
Each useEvery cycle
Remove cleaner from pool, open filter basket, rinse debris under a hose. Allows basket to dry before storage.
Weekly52×/yr
Inspect drive tracks for embedded debris or grit; clear any buildup to maintain traction on walls.
Monthly12×/yr
Check swivel cable connector for kinks or fraying; straighten cable and hang to preserve swivel function.
Seasonal4×/yr
Inspect filter basket seal for cracking or deformation; replace if debris bypass is observed. · Winterize by draining internal water passages, storing the cleaner and power supply indoors in a dry location above freezing.
Yearly1×/yr
Replace drive tracks if wear affects wall-climbing grip. Replacement track sets run approximately $40-70 depending on retailer.
As neededno fixed schedule
Replace brushes when PVC bristles show visible wear or wall scrubbing coverage declines; brush sets run approximately $20-40.
Cost over time · past the sticker
PurchaseRunning cost
Year 1
$1,679
Year 3
$1,839
Year 5
$1,999

$1,599 to buy, then about $80 a year for the replaceable parts below. Over three years that is roughly $240 past the sticker price. Excludes electricity and any repairs.

What you replace
  • BrushAs needed$20–40

Replacement cadence from the maintenance schedule; prices shown where the source documents them.

Safety notes

CautionDo not run with bathers present: Manufacturer requires removing the cleaner before swimmers enter the pool.

CautionPower supply water exposure: The external power supply must remain dry and away from pool splash zones during operation.

NoteCable trip hazard on deck: The 60-foot cable on the pool deck is a trip hazard; secure or store when not in use.

RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon
Just launched
Active updates
Settled
Discontinued
  1. Nov 2024 · AnnouncementMaytronics reveals Dolphin Sigma as 2025 ProLine pool cleaner
  2. Apr 2025 · ReleaseMaytronics Dolphin Sigma enters US retail as 2025 ProLine model
  3. Jul 2025 · UpdateMyDolphin Plus app gains scheduling and remote-start capability
  4. Nov 2025 · NewsListed as 2026 ProLine model in retailer catalogs
  5. Jul 2026 · AssessmentRobovations Score recorded at 62 of 100
  6. Jul 2026 · AssessmentRobovations Score revised 62 → 69
Common questions

What people actually ask.

6 answered
OperationDoes the Dolphin Sigma work on fiberglass pools, or only plaster?
Manufacturer documentation lists compatibility with gunite, plaster, tile, and fiberglass surfaces. The PVC and rubber brush combination is specified for smooth and textured finishes. Vinyl liner compatibility is not listed.
OwnershipHow often does the Sigma's filter basket need cleaning?
Maytronics recommends cleaning the filter basket after each cycle. In pools with heavy leaf loads, owner reports describe basket saturation before the cycle completes, requiring a mid-cycle manual rinse.
CompatibilityDoes the Sigma require the MyDolphin Plus app to operate?
No. The Sigma operates via its onboard power supply controls without the app. The MyDolphin Plus app adds scheduling and cycle-length selection but is not required for basic floor-wall-waterline cleaning.
OperationWill the Sigma's 60-foot cable reach all corners of a 50-foot pool?
Manufacturer specs list a 60-foot swivel cable for pools up to 50 feet. The swivel fitting at the cable entry reduces kinking. Owner reports note that pools with pronounced shallow-to-deep transitions can still produce cable bunching near steps.
OperationIs the Sigma the same cleaner as the Dolphin Nautilus CC Supreme?
No. The Sigma carries a different model number and is positioned above the Nautilus CC Supreme in Maytronics’ lineup, with gyroscopic mapping and waterline coverage that the Nautilus CC Supreme does not document at the same level.
OperationCan the Dolphin Sigma handle algae on pool walls, not just floor debris?
Owner reports and manufacturer marketing describe wall-climbing and scrubbing capability. Algae removal depends on brush contact duration and algae severity; the Sigma’s scheduled wall passes provide regular mechanical scrubbing, not chemical treatment.

Analysis

Dolphin Sigma in the analysis archive.

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Verified$799
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Availability

Where it's sold

We may earn commission from qualifying purchases. This does not influence classification.

Amazon See current listings
Cite / Embed

Reference the Dolphin Sigma classification.

Embed the Autonomy Ladder™ mark or copy the citation. The mark links back to this assessment and updates if the classification changes.

RobovationsAutonomy Ladder™Level IIIConditional AutonomyIndependent classification
Citation
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By RobovationsUpdated: Jun 19, 2026
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