Sonoff Wi-Fi Door/Window Sensor DW2
Get an instant phone alert when a door or window opens — great for home security, no hub needed, connects directly to Wi-Fi.
Know exactly how much water is in your rooftop tank, from your phone. Ultrasonic sensor mounts on the tank lid, reads liquid depth from 10 cm to 2.9 m, and pushes alerts to the Smart Life / Tuya app the moment levels go low or high.
55 $
Lebanese homes run on rooftop tanks, and Lebanese tanks run on guesswork. This sensor replaces the guesswork. It sits on the tank lid, pings the water surface with ultrasound every fraction of a second, and shows you live levels (percentage, depth in metres, trend over time) right on your phone.
Set thresholds once and the Tuya / Smart Life app handles the rest. Get a push notification when the tank drops below 20% so you can call the water truck before you run dry. Get another when it’s about to overflow so you can shut the inlet. Link it to a Tuya smart plug and it can auto-cut the pump for you.
The sensor uses non-contact ultrasonic measurement, which means it never touches the water. No corrosion, no fouling, no probes to scrub. Works with fresh water, oil, diesel, fuel — anything with a flat liquid surface inside a closed tank up to about 3 metres deep. The probe head is IP67-rated so spray and condensation aren’t a problem.
Setup is the usual Tuya story: plug in the included 5 V adapter, open the Smart Life app, scan, name it after the tank, done. Lebanon-friendly EU plug included. Once paired, the device shows up in Google Home and Alexa via the standard Tuya integration.
Delivery
Enjoy free standard delivery across Lebanon on orders over $50, or free pickup on orders over $30. We also offer same-day delivery options. For more details, visit our delivery information page.
Returns
We provide a 15-day return window for all orders, subject to certain exclusions. Please note that cash refunds are not available. For complete details, visit our return policy page.
Warranty
Our products are warranted to be free from manufacturing defects. If a product sold by us is found to be defective, we will, at our discretion, repair or replace it with a new one. Certain exclusions apply. For full details, please review our warranty policy page.
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Ultrasonic Wi-Fi tank monitor with live levels in the Tuya app. EU plug, IP67, 10 cm – 2.9 m range.
Percentage, depth in metres, and a trend chart, refreshed in seconds
Push notifications when the tank goes low (call the truck) or near full (shut the inlet)
Never touches the water — no corrosion, no fouling, no probes to clean
Water, oil, diesel, fuel — anything with a flat liquid surface inside a closed tank
Link to a smart plug or valve to auto-cut the pump or close the inlet
Runs on 220 V via the included EU plug — no extra adapter needed

Auto-cut your water pump when the tank is full

Shut the inlet automatically when levels are high

Add leak detection around the tank base

Control everything from the same Smart Life app
Yes, as long as the tank lid has a port the BSF 2 1/4" thread can mount into (most standard Lebanese rooftop tanks do). The sensor mounts on the lid pointing down at the water and measures depth up to 2.9 metres.
No. The sensor connects directly to your Wi-Fi (2.4 GHz only — not 5 GHz) and pairs through the Smart Life / Tuya app.
Yes, through the Tuya / Smart Life integration. Link your Smart Life account in the Alexa or Google Home app and the sensor shows up automatically.
Yes — pair it with a Tuya smart plug (like the Sonoff S60 Wi-Fi Smart Plug) and create a Tuya automation: 'when tank > 95%, turn pump off'.
It works on any liquid with a flat surface. The reading is based on ultrasonic distance, so the type of liquid doesn't matter as long as the surface reflects sound back.
The sensor needs Wi-Fi to push readings to the Tuya cloud and trigger alerts. Without internet, no live reading and no notifications. For pure offline tank monitoring, this product isn't the right fit.