SwitchBot W4402000 Water Leak Detector: Real-time notifications via Wi-Fi without hub
This set of three SwitchBot Water Sensors is for the proactive homeowner who wants to prevent minor drips from becoming major disasters. Think of it as your first line of defense for the hidden spots you check weekly—under the kitchen sink, behind the washing machine, or near the water heater in the basement.
While many water detectors focus on loud alarms after a leak, this device gives you a quieter peace of mind through its app. You get a notification on your phone the moment its high-sensitivity probes detect just 0.5mm of water, often before any sound is audible. This means you can address a slow pipe drip under the bathroom vanity from your office, potentially saving thousands in water damage.
Place these compact, IP67 waterproof sensors anywhere with a 2.4Ghz WiFi connection. They work without a hub and integrate with Alexa or Google Assistant for voice alerts. With up to two years of battery life and low-battery app reminders, they are a set-and-forget solution for whole-home coverage.
Features
- High sensitivity detects water as low as 0.5mm
- 100dB loud alarm for alerts
- IP67 waterproof and up to 2 years battery life
- Compatible with voice commands and smart home ecosystems
- Real-time notifications via Wi-Fi without hub
General specs
- Brand: SwitchBot
- Model: W4402000
- Seller: Amazon
- ID: B0CTJPCZQ7
- Material: Plastic
- IP Rating: IP67
- Alarm Type: Sound
- Dimensions: 32, 78, 29
- Item Weight: 259
- Sound Level: 100
- Battery Type: Alkaline
- Connectivity: Wi-Fi
- Hub Required: No
- Power Source: Battery
- Detection Type: Water Leak
- Sensors Included: 3
- Notification Type: App Notification
- Batteries Included: Yes
- Smart Home Compatibility: Amazon Alexa, Google Home
- First listed by seller: 12/9/25
If you are interested in more details, you can find full information on the seller's page.
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Shipping options
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Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
SwitchBot W4402000 White Real-time notifications via Wi-Fi without hub
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SwitchBot W4402010 White Real-time app and email alerts
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Nestool SQ400C White Instant smartphone alerts without hub
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METAK WD61x1 White Drip & leak alerts with 4 rear and 2 front probes
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Govee H5040+H5054 White Real-time alerts via email and app notifications
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Baldr VC-HCS016ARF-3-HWG023WRF White Real-time email and APP alerts
|
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| Brand | SwitchBot | SwitchBot | Nestool | METAK | Govee | Baldr |
| Model | W4402000 | W4402010 | SQ400C | WD61x1 | H5040+H5054 | VC-HCS016ARF-3-HWG023WRF |
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| Price | $39.99 | $16.99 | $16.49 | $9.99 | $32.92 | $14.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | December 9, 2025 | December 9, 2025 | December 6, 2025 | December 9, 2025 | December 9, 2025 | December 9, 2025 |
| Material | Plastic | ABS | Plastic | Plastic | ABS | |
| IP Rating | IP67 | IP67 | IP66 | IP67 | IP66 | |
| Alarm Type | Sound | Sound | Light, Sound | Sound, Light | Sound | Sound |
| Dimensions | 32, 78, 29 | 63.5, 25.4, 63.5 | 83.82, 30.48, 71.12 | 44.96, 26.42, <num_z> | 17.78, 88.9, 88.9 | |
| Item Weight | 259 | 68 | 85 | <num1>, <num2> | <num1>, <num2> | |
| Sound Level | 100 | 100 | 100 | 100 | 100 | 100 |
| Battery Type | Alkaline | Alkaline | Alkaline | Alkaline | Alkaline | |
| Connectivity | Wi-Fi | Wi-Fi | Wi-Fi | Wi-Fi | Wi-Fi | |
| Hub Required | No | No | No | No | No | No |
| Power Source | Battery | Battery | Battery | Battery | Battery | Battery |
| Detection Type | Water Leak | Water Leak, Water Level | Water Leak | Water Leak | Water Leak | Water Leak |
| Sensors Included | 3 | 1 | 1 | 1 | 3 | 3 |
| Notification Type | App Notification | App Notification | App Notification | App Notification | App Notification | |
| Batteries Included | Yes | Yes | No | Yes | Yes | Yes |
| Smart Home Compatibility | Amazon Alexa, Google Home | Amazon Alexa, Google Home | Amazon Alexa, Google Home, Tuya Smart | Amazon Alexa, Google Home | eWeLink | |