SwitchBot W4402000 1 Sensor Included Water Leak Detector
Available Options
This SwitchBot Water Sensor is for the homeowner who wants to stop water damage before it starts. Think of it as your first line of defense for checking under the sink after a dishwasher cycle or monitoring a basement sump pump during a storm. While many detectors focus on security, this one is about prevention and quiet confidence.
The 100dB alarm is loud enough to hear from another floor, but the real peace comes from the app alert. You will get the notification on your phone before you even hear the siren, letting you act fast. Its ultra-sensitive probes can detect a puddle as thin as a credit card, so you catch leaks early. No hub is required—it connects directly to your 2.4GHz WiFi for instant alerts and remote monitoring, and you can share access with family. The IP67 waterproof design and up to two-year battery life mean you can set it and forget it in damp spots like under the water heater. Use voice commands with Alexa or Google Assistant, or automate responses with other smart devices for hands-free control.
Features
- No hub required with direct WiFi alerts and app/email notifications
- Ultra-sensitive 0.5mm detection with high-precision probes
- 100dB adjustable alarm with smart mute via app
- IP67 waterproof and up to 2 years battery life
- Works with Alexa, Google, and Siri for voice control
Product details
General specs
- Brand: SwitchBot
- Model: W4402000
- Color: White
- Material: Plastic
- IP Rating: IP67
- Alarm Type: Sound
- Sound Level: 100
- Battery Type: Alkaline
- Connectivity: Wi-Fi
- Hub Required: No
- Power Source: Battery
- Detection Type: Water Leak
- Notification Type: App Notification
- Batteries Included: Yes
- Smart Home Compatibility: Amazon Alexa, Google Home
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Shipping options
United States
Available Options
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3 Sensors Included | Amazon | $39.99 | Available | View |
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1 Sensor Included | Amazon | $17.99 | Available | Current |
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
SwitchBot W4402000 White
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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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Nuleto CD15 White Whole-property coverage up to 492 feet
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Govee H5040+H5054 White Real-time alerts via email and app notifications
|
TECKNET TK-WA161 White
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| Brand | SwitchBot | SwitchBot | Nestool | Nuleto | Govee | TECKNET |
| Model | W4402000 | W4402010 | SQ400C | CD15 | H5040+H5054 | TK-WA161 |
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| Price | $17.99 | $16.99 | $16.49 | $25.99 | $31.27 | $22.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | January 12, 2026 | January 12, 2026 | December 6, 2025 | January 12, 2026 | January 12, 2026 | January 12, 2026 |
| Material | Plastic | ABS | Plastic | Plastic | Plastic | Plastic |
| IP Rating | IP67 | IP67 | IP65 | IP67 | ||
| Alarm Type | Sound | Sound | Light, Sound | Sound | Sound | Sound |
| Dimensions | 82, 85, 42 | 63.5, 25.4, 63.5 | 83.31, 32.77, 32.77 | 44.96, 26.42, <num_z> | 10, 10, 10 | |
| Item Weight | 68 | 68 | 85 | <num1>, <num2> | <num1>, <num2> | |
| Sound Level | 100 | 100 | 100 | 100, 110 | 100 | 120 |
| Battery Type | Alkaline | Alkaline | Alkaline | Alkaline | Alkaline | |
| Connectivity | Wi-Fi | 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 | 1 | 1 | 1 | 3 | 3 | 2 |
| Notification Type | App Notification | 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 | Amazon Alexa, Google Home | Tuya Smart |