Purpose-built for aluminium boats, HullSentry watches your DC system, keeps the measurement history, alerts you automatically, and helps you pinpoint the circuit at fault.
HullSentry measures the insulation resistance between each battery terminal and the hull. It scans up to four battery banks, shows their status at the panel, and keeps the readings so you can see what changed and when.
HullSentry checks your insulation every 10 minutes by default, records the results and updates the status lights.
If a problem appears, it can sound the buzzer, send an email over Wi-Fi and activate an external alarm through its relay output.
If a wiring change brings a circuit into contact with the hull, the next scan can reveal it. If a terminal slowly corrodes in bilge water, follow the developing trend from 2 MΩ.
Compare the measurement history with shore-power use, solar charging or heavy rain to help understand when a leak started.
Start a live test from the front panel, then follow the resistance in ohms as you check the wiring. Sound feedback helps you notice changes while you work away from the display.
Live testing is for attended troubleshooting. After one hour, HullSentry automatically returns to periodic scanning.
View the readings for each battery bank, follow insulation trends over time and download your data as a CSV file. The web portal is available in English and French.
Less than 2 mA, applied only during measurements.
Self-test and self-calibration check the instrument's operation and raise an alarm if a fault is detected.
Consult the history remotely, receive email alerts over Wi-Fi and export your readings as CSV.
Clear readings, labelled controls and mechanical buttons. Available in English and French, from the frontplate to the web portal.
Available with English or French lettering, to match your installation.
An EPDM gasket seated in a recess between the frontplate and the enclosure.
A 20×4 display and seven mechanical controls: Mute, Scan now, Debug and four navigation keys.
A separate modem board provides the hardware for cellular connectivity, with an external antenna connection at the rear.
Measures both poles of up to four battery banks against the hull. This board also carries the 5 V contact-loop supply, optocoupler and digital input conditioning for a float switch or relay contact.
Pluggable terminal blocks bring together power, the hull connection, additional battery banks and the external alarm contact. A digital input with a 5 V sensing loop accepts a high-water float switch or another dry contact or compatible NPN open-collector sensor. It requires external power to the unit.
Connect bank A and hull SENSE. Banks B–D, hull TEST, the external alarm and the digital sensor input are optional. Connect a dry contact or compatible NPN open-collector sensor between SENSOR IN and SENSOR COM, the DC supply negative. The unit provides the 5 V loop. Do not apply external voltage. External unit power is required; the sensor input is inactive on USB alone.
NPN outputs must sink 10 mA with a voltage drop ≤0.2 V and off-state leakage ≤100 µA. An off-state voltage rating of at least 30 V is recommended.
Power input
12 V or 24 V DC, with reverse-polarity protection. The supply also serves as the first monitored battery bank.
Battery monitoring
Up to four battery banks, positive and negative: the 12/24 V supply bank and three additional banks rated 12, 24 or 48 V nominal.
Measuring range
0 Ω to 2 MΩ insulation resistance between each monitored battery terminal and the hull.
Automated scans
All configured battery banks are checked every 10 minutes by default. Start an extra scan at any time from the panel.
Alerts
Status lights, an audible alarm with mute, email notifications over Wi-Fi and an external alarm relay output.
Mechanical buttons
Acknowledge event, scan now, live test, up, down, OK and back/menu. Hold the acknowledgement button to toggle mute.
Frontplate
Available in English and French, with an LCD and clearly labelled controls and indicators.
Languages
English and French for the frontplate, firmware and web portal.
Connectivity
Onboard Wi-Fi for email alerts and remote access. HullSentry Pro adds cellular connectivity through its included 4G board.
History and export
View measurements and trends in the web portal, or download your data as a CSV file.
790 €
The complete monitor, with local Wi-Fi access and email alerts.
890 €
Everything in HullSentry, with the 4G board and cloud service included.
Optional. View your readings and history online from anywhere. Included for two years with HullSentry Pro.
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Join the waitlist for updates, installation notes, early availability announcements, and preferential launch pricing.
