Help me choose
A stronger Pool Express option
Dolphin S200 and Niya Sonar Ray are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
S-Line
Dolphin S200
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Niya Sonar
Niya Sonar Ray
Flat-bottomed above-ground and small inground pools up to 26 ft that need the floor cleaned without a cord.
What we recommend instead
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin QuantumDolphin S200 or Niya Sonar Ray: our take
Dolphin S200 and Niya Sonar Ray are compared on pool fit, cleaning reach, debris handling, controls and ownership details. The recommendation is based on the job the robot must do—not a simple feature count.
Pool fit and cleaning reach
Dolphin S200 is intended for inground pools, while Niya Sonar Ray is intended for inground and above-ground pools. Dolphin S200 is rated for pools up to 50 ft; Niya Sonar Ray is rated up to 26 ft. Dolphin S200 cleans floor, walls, and waterline; Niya Sonar Ray cleans floor. Dolphin S200 lists 2 active brushes. Niya Sonar Ray lists Sonar navigation.
Filtration and debris
Dolphin S200 includes Basket and UltraFilter; Niya Sonar Ray includes Basket. That gives Dolphin S200 the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin S200 provides a weekly timer and power-supply controls; Niya Sonar Ray provides one-touch starts and power-supply controls. Dolphin S200 uses a 60 ft corded cable with an anti-tangle swivel, while Niya Sonar Ray uses cordless battery power.
Price, warranty and the decision
Dolphin S200 is listed at $1,199 and Niya Sonar Ray at $199; Niya Sonar Ray is $1,000 less. Dolphin S200 lists a 2-year warranty compared with 1 years for Niya Sonar Ray. Dolphin S200 and Niya Sonar Ray each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Feature check: what each robot actually has
A green check means the feature is documented as included. A red X means it is documented as absent. A dash means the source does not make the feature clear.
| Feature | Dolphin S200 | Niya Sonar Ray |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | YesEdge | No |
| Scrubs the waterline | YesEdge | No |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | YesEdge | No |
| Smartphone app | No | No |
| Anti-tangle swivel | Yes | Not listed |
| 3-year warranty | No | No |
| No recharging between cycles | YesEdge | No |
| Built-in UV-C water treatment | No | No |
Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.
Where Dolphin S200 stands out
Dolphin S200 is the better fit for pools up to 50 ft.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Includes filtration for sand, pollen and other fine debris
- Can start on a weekly schedule without a manual launch before every cycle
- Carries a 2-year warranty instead of 1 years
Where Niya Sonar Ray stands out
Niya Sonar Ray is the better fit for shoppers prioritizing the lower $199 starting price.
- Is listed $1,000 lower
- Cleans the pool floor
Dolphin S200 vs Niya Sonar Ray specifications
Use pool fit first. Price and app control do not make up for a robot that cannot cover the length or surfaces you need cleaned.
| Specification | Dolphin S200 | Niya Sonar Ray |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. | Flat-bottomed above-ground and small inground pools up to 26 ft that need the floor cleaned without a cord. |
| Starting price | $1,199 | $199 |
| Pool type | Inground | Inground, Above-ground |
| Maximum pool length | Up to 50 ft | Up to 26 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor |
| Power | Corded | Cordless |
| Filtration | Basket, UltraFilter | Basket |
| Scheduling | Weekly schedule | One-touch start |
| App and remote | Power-supply controls | Power-supply controls |
| Cable | 60 ft with anti-tangle swivel | Cordless |
| Robot weight | Not listed | 7.1 lb |
| Warranty | 2 years | 1 years |
Consider the stronger Pool Express option
Dolphin S200 and Niya Sonar Ray are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
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