DC leakage monitoring for metal-hull boats
Monitor up to 4 battery banks, get historic trends and automatic alerts, and use continuous debug mode to help find the circuit causing the problem.
How it works
HullSentry checks the positive and negative side of each battery bank against the hull reference, logs numerical readings, and keeps simple panel status visible through the LCD and leakage level LEDs.
Peace of mind, without remembering to use the tester.
Install the device and forget about it.
In monitoring mode, the device wakes at the configured interval, such as every hour, scans all battery banks for leaks, stores the readings, updates status LEDs, and if necessary raises an alert by email, sounds a buzzer, or activates an external relay if configured.
Actual trends, no more wondering when it started.
Traditional indicators show the present condition. Logged trends help owners see whether a conductor is stable, slowly changing, or moving during solar panel operation, shore-power use, or heavy rain.
Actual Ohm values and sound feedback while you work.
Select one battery terminal and watch the live value change as you work. Fixing one leak in presence of another has a noticeable effect, contrary to pure LED-based monitors.
Higher and lower beeps keep you aware of changes while you are working deep in the hull, without calling someone back at the panel to read values to you.
Capabilities
Side by side
The three DC leakage monitors metal-boat owners actually compare side by side. Tap the 'i' in the Technology row to see how each one detects a leak.
| Feature | HullSentry | Dolphin Leakage Monitor 12.24 | SeaBis Master System |
|---|---|---|---|
| Technology | HullSentry Periodically measures DC resistance from each battery pole to the hull, logs the values, and alerts when leakage rises above a threshold. | Dolphin Leakage Monitor 12.24 Push-button current meter showing leakage current between battery + or − and the hull on a three-colour LED bargraph (green / yellow / red). | SeaBis Master System Always-on sensor measuring stray current flowing from boat to earth. Three LED states (Normal / Caution / Critical) signal the severity. |
| Price (€) | — | 249 | 349 |
| Voltage (V) | 12/24 | 12/24 | 8–33 |
| Banks | 4 | 1 | 1 |
| Leak LEDs | Yes | Yes | Yes |
| kΩ on unit | Yes | No | No |
| ± measured | Yes | Yes | Yes |
| Hands-off | Yes | No | Yes |
| Data logging | Yes | No | No |
| Buzzer | Yes | No | No |
| Email alerts | Yes | No | No |
| Relay output | Yes | No | No |
| Live diagnostic | Yes | No | No |
| Audio diagnostic | Yes | No | No |
| Wi-Fi | Yes | No | No |
| Web server | Yes | No | No |
| Data export | Yes | No | No |
Join the waitlist
Join the waitlist for updates, installation notes, and early availability announcements.
Important note
HullSentry is a monitoring tool and diagnostic aid for aluminium and steel boats. It supports troubleshooting, but it is not a replacement for a qualified marine electrician.