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S4B - bilge
S4B – bilgeBilge-sensor

Sense4Boat – Smart Bilge Sensor


Smart Bilge Sensor

The Smart Bilge Sensor continuously monitors the water presence in the bilge and prevents not only a rapid sinking of your boat, but also damage from the stale rain water accumulated in your bilge over a long time. The water detection is performed via a robust marine-grade float switch, which has to be held in a upward vertical position for at least 30sec (to avoid possible false alarms). The high water alarm will be delivered to the boat owner and all additional emergency contacts via an automated voice call, SMS, email and push notifications. The email and push messages will be repeated every 3h until resolved. Optionally, the alert can also be forwarded to the selected Proactive Boat Care providers (marina, yacht service), enabling them to swiftly react and prevent potential disaster.

The sensor is also equipped with a temperature sensor, which will alert you of possible freezing hazard if the temperature falls below 2°C. The sensor performs a self-check every 24h and reports its health status to the network.

The sensor is wireless and connects directly to the internet. The installation is very simple with no connection to the electrical wiring. The sensor is powered by an internal battery lasting up to 7 years. First year subscription included in the initial price!


If you require support with your smart bilge sensor follow this link.

If you would like to order & pay by credit card, please ring 01829 771792 to process between 9am-3pm Monday to Thursday and 9am -1pm on Friday.


Product Description

Technical Specifications



The bilge sensor communicates directly to the Sense4Boat control centre through a specialised IoT network. No SIM card or additional network costs are required.


User-Replaceable Batteries

2 x AA Lithium-Batterie 3,6V 2600mAh

Battery life

Up to 7 years

Supported Battery Types

AA Lithium-Batterie 3,6V 2600mAh
*Please dispose of Lithium batteries in a safe and responsible manner



 94 x 65 x 32,5 mm


 111 g


Super strong, high temperature resistant polycarbonate casing

IP rating

IP68 rated housing ensures device can withstand fine dust, high-pressure spray,
submersion for 30 mins in 1m of water, and extreme temperatures.


Compact and easy to install.
Multiple installation options for easily securing the device to assets with screws, bolts, cable ties, rivets, and more.

Operating temperature

-20°C to +85°C

Diagnostic LED

Diagnostic LED signifies operation status

Sensor Lead Length

2 meter lead

Talk to a specialist today +44(0)1829 771792 or Email Envin Scientific

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