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  1. Home
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Shark Detect Pro IW3511 vs PowerDetect Cordless IP1251

Which Vacuum Is Better?

    Top
    Main Differences
    Design
      Build QualityUser MaintenanceRecurring CostStoringDirt CompartmentIn The BoxRangePortabilityBatteryQuality Of Life FeaturesTools And BrushesAlternative Configuration
    Performance
      Hard Floor PickupHigh-Pile Carpet PickupLow-Pile Carpet PickupPet Hair PickupSuctionAirflowNoiseManeuverabilityPet Hair Furniture PerformanceAir QualityCracksStainsWater
    Comments

Products

Shark Detect Pro IW3511
Shark PowerDetect Cordless IP1251

Tested using Methodology v1.3

Updated Sep 04, 2025 03:26 PM

SEE PRICE
Amazon.com

Tested using Methodology v1.3

Updated Sep 04, 2025 03:27 PM

SEE PRICE
Amazon.com
Shark Detect Pro IW3511 Picture
Shark PowerDetect Cordless IP1251 Picture
Wet Compatible
No
Vacuum Type
Stick/Handheld
Bagless
Yes
Cordless
Yes
Anti-Allergy Filter (HEPA)
Yes
Wet Compatible
No
Vacuum Type
Stick/Handheld
Bagless
Yes
Cordless
Yes
Anti-Allergy Filter (HEPA)
Yes

Our Verdict

Shark Detect Pro IW3511

Shark PowerDetect Cordless IP1251

The Shark PowerDetect Cordless IP1251 can be considered the bigger brother to the Shark Detect Pro IW3511. Both are cordless stick vacuums with automatic power adjustment systems and an optional self-emptying base station accessory. That said, the PowerDetect feels more robust, and it has a more powerful suction motor that results in better performance on carpeted floors. In comparison, the Detect Pro is smaller and lighter, which can make it a better option where space is really at a premium. 

0 

Variants

  • IW1120 (Ash Purple/Gray)
  • IW3110 (Ash Purple/Gray)
  • IP3251 (Dark Gray)
  • IP1251 (Gray/Purple)

Review

See Shark Detect Pro IW3511 Review
See Shark PowerDetect Cordless IP1251 Review
5 
1 

Check Price

Ash Purple/Gray 
IW1120
SEARCH
Amazon.com
Dark Gray
IP3251
SEE PRICE
Amazon.com
Ash Purple/Gray 
IW3110
SEARCH
Amazon.com
Gray/Purple
IP1251
SEE PRICE
Amazon.com
White/Ash Purple
IW3510
SEARCH
Amazon.com
Gray/Purple
IP1250
SEE PRICE
Walmart.com
White/Beats Brass
IW3511
SEE PRICE
Amazon.com
 
White/Beats Brass
IW3611
SEARCH
Amazon.com
 
White/Beats Brass
IW1511
SEE PRICE
Amazon.com
 
White/Dark Gray
IW1111
SEE PRICE
Amazon.com
 
White/Dark Gray
IW3615
SEARCH
Amazon.com
 

Main Differences for
Bare Floor

Threshold 

0.10

Bare Floor 
 

7.1
7.5

Recurring Cost 
 

6.0
10

Airflow 
 

5.6
7.0

Full Comparison

Design

Build Quality 
 

6.5
7.5

Build Quality Picture 
 

Compare High-Res
Shark Detect Pro IW3511 Build Quality Picture
Compare High-Res
Shark PowerDetect Cordless IP1251 Build Quality Picture

Vacuum Type 
 

Stick/Handheld
Stick/Handheld
Show Text 

User Maintenance 
 

6.5
7.0

Maintenance Picture 
 

Compare High-Res
Shark Detect Pro IW3511 Maintenance Picture
Compare High-Res
Shark PowerDetect Cordless IP1251 Maintenance Picture

Brushroll Cleaning Video  

Show Text 

Recurring Cost 
 

6.0
10

Recurring Cost Picture 
 

Compare High-Res
Shark Detect Pro IW3511 Recurring Cost Picture
Compare High-Res
Shark PowerDetect Cordless IP1251 Recurring Cost Picture

Bag Part Number  

No bag
No bag

Filter Part Number  

XPRFIW1000
XPRMFIP1000

HEPA Filter Part Number  

XHFIW1000
XPMHIP1000
Show Text 

Storing 
 

7.7
6.5

Storing Picture 
 

Compare High-Res
Shark Detect Pro IW3511 Storing Picture
Compare High-Res
Shark PowerDetect Cordless IP1251 Storing Picture

Height 
 

43.58" (110.7 cm)
26.34" (66.9 cm)

Width 
 

10.47" (26.6 cm)
10.20" (25.9 cm)

Depth 
 

13.74" (34.9 cm)
12.87" (32.7 cm)

Cord Storing 
 

Manual
Not Needed

On-Board Tool Storage 
 

Yes
No

Vacuum Rack/Station 
 

Yes
No
Show Text 

Dirt Compartment 
 

7.9
6.7

Dirt Compartment Picture 
 

Compare High-Res
Shark Detect Pro IW3511 Dirt Compartment Picture
Compare High-Res
Shark PowerDetect Cordless IP1251 Dirt Compartment Picture

Bagless 
 

Yes
Yes

Volume 
 

0.74 gal (2.80 L)
0.08 gal (0.30 L)

Full Indicator 
 

No
Yes

Bag Included 
 

No Bag Needed
No Bag Needed
Show Text 

In The Box 
 

In The Box Picture 
 

Compare High-Res
Shark Detect Pro IW3511 In The Box Picture
Compare High-Res
Shark PowerDetect Cordless IP1251 In The Box Picture
Show Text 

Range 
 

10
10

Cordless 
 

Yes
Yes

Cord Length 
 

N/A
N/A

Hose Length 
 

N/A
N/A

Minimum Wand Length 
 

0.90 ft (0.27 m)
1.41 ft (0.43 m)

Maximum Wand Length 
 

3.04 ft (0.93 m)
3.15 ft (0.96 m)

Total Range 
 

N/A
N/A
Show Text 

Portability 
 

8.2
7.6

Total Weight 
 

5.84 lbs (2.65 kg)
8.16 lbs (3.70 kg)

Weight In Hand 
 

3.28 lbs (1.49 kg)
4.50 lbs (2.04 kg)

Carrying handle 
 

Yes
Yes
Show Text 

Battery 
 

7.4
7.0

Minimum Battery Life 
 

11 min
13.8 min

Maximum Battery Life 
 

68 min
78.1 min

Recharge Time 
 

229 min
384 min

Recharge Dock 
 

Yes
No

Battery Life Indicator 
 

Yes
Yes

Removable Batteries 
 

Yes
Yes
Show Text 

Quality Of Life Features 
 

Picture Of Controls 
 

Compare High-Res
Shark Detect Pro IW3511 Picture Of Controls
Compare High-Res
Shark PowerDetect Cordless IP1251 Picture Of Controls

Rotating Head 
 

Yes
Yes

Power Adjustment 
 

Yes
Yes

Self-Propelled 
 

No
No

Headlights 
 

Yes
Yes

Easy On/Off 
 

Yes
Yes

Head Surface Type Adjustment 
 

Only Automatic
Only Automatic
Show Text 

Tools And Brushes 
 

Tools And Brush Picture 
 

Compare High-Res
Shark Detect Pro IW3511 Tools And Brush Picture
Compare High-Res
Shark PowerDetect Cordless IP1251 Tools And Brush Picture

Brushroll 
 

Yes
Yes

Brushroll On/Off 
 

No
No

Removable Brushroll 
 

Yes
No

Turbo Brush 
 

No
No

Crevice Tool 
 

Yes
Yes

Upholstery Tool 
 

Yes
Yes

Soft Bristle Brush 
 

Yes
Yes

Hard Bristle Brush 
 

No
Yes

Extension Wand 
 

Yes
Yes

Ceiling Fan Tool 
 

No
No

Pet Grooming Tool 
 

Yes
No
Show Text 

Alternative Configuration 
 

Alternative Configuration Photo 1 
 

Compare High-Res
Shark Detect Pro IW3511 Alternative Configuration Photo 1
Compare High-Res
Shark PowerDetect Cordless IP1251 Alternative Configuration Photo 1

Alternative Configuration Photo 2 
 

Compare High-Res
Shark Detect Pro IW3511 Alternative Configuration Photo 2
Compare High-Res
Shark PowerDetect Cordless IP1251 Alternative Configuration Photo 2

Blower Mode 
 

No
No
Show Text 
Performance

Hard Floor Pickup 
 

8.0
8.0

Hard Floor Pickup video  

Hard Floor Pickup Post Test 
 

Compare High-Res
Shark Detect Pro IW3511 Hard Floor Pickup Post Test
Compare High-Res
Shark PowerDetect Cordless IP1251 Hard Floor Pickup Post Test
Show Text 

High-Pile Carpet Pickup 
 

5.0
6.5

High-Pile Carpet Pickup Video  

High-Pile Carpet Pickup Post Test 
 

Compare High-Res
Shark Detect Pro IW3511 High-Pile Carpet Pickup Post Test
Compare High-Res
Shark PowerDetect Cordless IP1251 High-Pile Carpet Pickup Post Test
Show Text 

Low-Pile Carpet Pickup 
 

6.5
7.0

Low-Pile Carpet Pickup Video  

Low-Pile Carpet Pickup Post Test 
 

Compare High-Res
Shark Detect Pro IW3511 Low-Pile Carpet Pickup Post Test
Compare High-Res
Shark PowerDetect Cordless IP1251 Low-Pile Carpet Pickup Post Test
Show Text 

Pet Hair Pickup 
 

8.0
7.5

Pet Hair Pickup Video  

Pet Hair Pickup Post Test 
 

Compare High-Res
Shark Detect Pro IW3511 Pet Hair Pickup Post Test
Compare High-Res
Shark PowerDetect Cordless IP1251 Pet Hair Pickup Post Test
Show Text 

Suction 
 

2.7
1.7

Suction Video  

Maximum Hose Suction 
 

67.5 inH₂O (16.81 kPa)
107.5 inH₂O (26.78 kPa)

Maximum Head Suction 
 

1.1 inH₂O (0.28 kPa)
0.8 inH₂O (0.19 kPa)

Normal Head Suction 
 

0.6 inH₂O (0.15 kPa)
0.4 inH₂O (0.09 kPa)

Setting Used For Normal  

"AUTO", (QuadClean™ Multi-Surface Brushroll)
"Detect Mode", (DuoClean Detect™ Nozzle)

Hose Diameter 
 

1.1" (2.8 cm)
1.1" (2.8 cm)
Show Text 

Airflow 
 

5.6
7.0

Maximum Airflow Video  

Maximum Hose Airflow 
 

35.7 CFM (1.0 m³/min)
54.4 CFM (1.5 m³/min)
Show Text 

Noise 
 

8.1
8.4

Noise Video 
 

Bare Floor 
 

74.4 dBA
71.2 dBA

Low-Pile Carpet 
 

76.3 dBA
76.5 dBA
Show Text 

Maneuverability 
 

7.5
8.0

Maneuverability Video  

Show Text 

Pet Hair Furniture Performance 
 

8.5
7.5

Sofa Pickup Video  

Sofa Pickup Post Test 
 

Compare High-Res
Shark Detect Pro IW3511 Sofa Pickup Post Test
Compare High-Res
Shark PowerDetect Cordless IP1251 Sofa Pickup Post Test
Show Text 

Air Quality 
 

Sealing Quality Video  

Anti-Allergy Filter (HEPA) 
 

Yes
Yes
Show Text 

Cracks 
 

5.5
5.5

Cracks Video  

Wood Cracks Post Test 
 

Compare High-Res
Shark Detect Pro IW3511 Wood Cracks Post Test
Compare High-Res
Shark PowerDetect Cordless IP1251 Wood Cracks Post Test
Show Text 

Stains 
 

3.0
1.0

Stain Video  

Stain Pickup Post Test 
 

Compare High-Res
Shark Detect Pro IW3511 Stain Pickup Post Test
Compare High-Res
Shark PowerDetect Cordless IP1251 Stain Pickup Post Test
Show Text 

Water 
 

0.0
0.0

Wet Compatible 
 

No
No

Water Video  

Water Pickup Post Test 
 

Compare High-Res
Shark Detect Pro IW3511 Water Pickup Post Test
Compare High-Res
Shark PowerDetect Cordless IP1251 Water Pickup Post Test
Show Text 

Check Price

Ash Purple/Gray 
IW1120
SEARCH
Amazon.com
Dark Gray
IP3251
SEE PRICE
Amazon.com
Ash Purple/Gray 
IW3110
SEARCH
Amazon.com
Gray/Purple
IP1251
SEE PRICE
Amazon.com
White/Ash Purple
IW3510
SEARCH
Amazon.com
Gray/Purple
IP1250
SEE PRICE
Walmart.com
White/Beats Brass
IW3511
SEE PRICE
Amazon.com
 
White/Beats Brass
IW3611
SEARCH
Amazon.com
 
White/Beats Brass
IW1511
SEE PRICE
Amazon.com
 
White/Dark Gray
IW1111
SEE PRICE
Amazon.com
 
White/Dark Gray
IW3615
SEARCH
Amazon.com
 
Back to Top

Shark Detect Pro IW3511

Shark PowerDetect Cordless IP1251

Comments

  1. Comparison
 • Posted 1 year ago

Shark Detect Pro IW3511 vs Shark PowerDetect Cordless IP1251: Main Discussion

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