Roborock Saros 20 Flow
Roborock's roller-mop Saros: 36,000 Pa, a retracting LiDAR in an 89.8 mm body, a roller rinsed with hot water and a tank refilled warm after each wash, and 8.8 cm double thresholds.
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Our verdict
The Saros 20 Flow is the Saros 20 chassis with a roller in place of two spinning pads and the RetractSense turret in place of the solid-state array. SpiraFlow 2.0 is the point of it: the dock refills the robot's tank with warm water after every wash, rinses the roller with hot water and keeps the dirty water apart, and an RGB camera reads the type of mess and adds passes where the floor is worse. The motor is the familiar 36,000 Pa behind a Dual Zero-Tangle brush pair, the AdaptiLift arm lifts the body over double thresholds of 8.8 cm, and the LiDAR drops into the body for 89.8 mm of clearance; structured light, RGB vision and an LED handle obstacles day and night. Roborock prints 352 × 353 mm, 5.2 kg, a 65 W rating and a two-year German warranty, one year in America, and nothing else: no battery, runtime, wash or drying temperature, bin, tank, noise figure, single-step threshold, mop lift or voice control. Germany sells it as the Complete with seven dust bags; America sells the plain box.
Pros
- Roller rinsed with hot water on the move, dirty water kept separate, tank refilled warm after each wash
- 36,000 Pa with a Dual Zero-Tangle brush pair
- Retracting LiDAR for 89.8 mm of clearance, structured light plus RGB vision with an LED
- AdaptiLift arm clears 8.8 cm double thresholds
- Dirt detection by camera adds passes where the floor is dirtier
Cons
- No battery, runtime, charging time, bin, tank, noise figure or wash temperature published
- No mop lift, drying or voice control claimed, and no single-step threshold figure
- Two years of warranty in Germany, one in America
- Not on the British shop when read
Best for
- Hard-floor homes that want a roller with a self-cleaning dock and a low body
- Flats with high or double door thresholds
Not recommended for
- Carpeted homes, since no mop lift is claimed
- Buyers who need a published runtime or wash temperature
Edited by Maciej Ziółko, founder and editor. Method: specification analysis of the makers' published figures, explained on our scoring and editorial policy pages.
Score breakdown
- Cleaning
- 83 /100
- Navigation
- 88 /100
- Mopping
- 62 /100
- Obstacle Avoidance
- 95 /100
- Automation
- 71 /100
- Ease of Use
- 82 /100
- Reliability
- 72 /100
- Value
- 29 /100
In detail
Suction and brushes
The manufacturer rates the suction at 36,000 Pa. That is more than 88% of the 114 robot vacuums we list. The main brush is the tangle-resistant type, with one side brush.
Mopping
Mop system: washed roller. The mop does not lift for carpet.
Navigation and obstacles
It navigates by retracting LiDAR and avoids obstacles with camera + depth sensor. No-go zones can be drawn in the app.
The dock
The dock empties the bin, washes the mop and refills the water tank.
Battery, charging and noise
The manufacturer publishes neither a runtime nor a noise figure.
YouTube reviews by other authors
Public videos, picked automatically by title and views and refreshed every few days. They do not feed the Verdict Score.
Specifications
Cleaning
- Suction
- 36,000 Pa
- Brush system
- Tangle-resistant
- Side brushes
- 1
- Carpet boost
- No
- Dustbin
- Not published
Navigation
- Mapping
- Retracting LiDAR
- Obstacle avoidance
- Camera + depth sensor
- Saved floor plans
- Not published
- Threshold climb
- Not published
Mopping
- Mop type
- Washed roller
- Mop lift
- No
- Extending mop
- No
- Water tank
- Not published
- Mop system
- SpiraFlow 2.0 pressurised self-cleaning: the roller is rinsed with hot water and the dirty water kept separate
- Dirt sensor
- RGB vision reads the type of mess, adjusts the mop wash and adds passes where the floor is dirtier
Dock
- Self-emptying
- Yes
- Mop washing
- Yes
- Mop wash temperature
- Not published
- Mop drying
- No
- Water refill
- Yes
- Plumbed drain
- No
- Dust bag interval
- Not published
- Tank refill
- Warm water after every mop wash
- Dock size and weight
- 381 × 456 × 451 mm with the robot, 10.1 kg; 15.6 kg with robot and accessories
- Complete box, German shop
- 7 dust bags, 2 filters, 2 pairs of side brushes, detergent, 1 roller mop
Software
- No-go zones
- Yes
- Pet recognition
- No
Power
- Battery
- Not published
- Runtime
- Not published
- Charging time
- Not published
- Rated power
- 65 W
- Warranty in America
- 1 year, against 2 in Germany
Connectivity
- Wi-Fi
- Yes
- Bluetooth
- No
- 4G / LTE
- No
- Voice control
- No
Physical
- Weight
- 5.2 kg
- L × W × H
- 352 × 353 × 90 mm
- Noise
- Not published
Support
- Warranty
- 24 months
- Released
- Not published
Chassis
- Double-step threshold
- 8.8 cm with the AdaptiLift Traverse 3.0 climbing arm; no single-step figure printed
Obstacles
- Sensors
- Structured light, RGB vision and an LED for dark rooms
Data source: Roborock DE product page, feature copy, Packungsinhalt and Technische Daten lines, retrieved October 1, 2026
Where to buy
Prices are read every night from the manufacturers' shops that list the machine, and shown as read. A price no read has confirmed for several days is marked with the day it was last seen. Where a week or more of readings exists, the lowest we recorded in the last 30 days is stated as well. RoboVerdict may earn a commission when you buy through links on our site. This does not affect our rankings. As an Amazon Associate I earn from qualifying purchases.
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