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Boat Alarms

      Boat Alarms Product Listings

      • Hi-Water Boat Bilge Alarm System
        $133.79
        $86.99

        Rule Hi-Water Boat Bilge Alarm System These High Water Bilge Alarms consist of a non-mercury float switch and an in-dash gauge that feature both a visual and an audible 85 db alarm. This unit allows an unmanned compartment to be constantly monitored...

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      • Sea Dog Boat Bilge Water Alarm Panel
        $22.49
        $16.49

        Sea Dog Boat Bilge Water Alarm Panel The 423033 Bilge Water Alarm panel provides an audible and visual means of warning that water level in your bilge is beyond your bilge pump float switch level. Bilge pump should be hooked up to a switch such as...

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      • Johnson Boat Bilge Water Alarm
        $144.99
        $92.99

        Johnson Boat Bilge Water Alarm The Bilge Alert high water detection alarm by Johnson uses a field effect technology to detect the presence of liquid. It is able to detect liquids with no moving parts. Highly reliable and durable this Boat Bilge Alert...

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      • Siren Marine Audible Alarm
        $55.11

        Siren Marine Audible Alarm The Siren Marine audible alarm produces a powerful beeping sound (105 decibels). The alarm can be connected to one of the outputs on the MTC, which will allow it to be turned on and off from the "switching" section of the...

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      • Siren Marine Wired Canvas Snap Cover Sensor
        $38.47

        Wired Canvas Snap Cover Sensor The canvas snap sensor is ideal for boats that have a canvas cover or part cover, and replaces a canvas snap for entry alert. When the normally closed alarm circuit is opened, it triggers an entry alert to the boat owner...

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      • Siren Marine Battery Sensor f\/Siren 3
        $139.09

        Battery Sensor for Siren 3 Monitor battery voltage with the Wireless Battery Sensor, and never worry about a dead battery again. Attach the Battery Connector to one of the boat’s batteries and plug the other end into the Wireless Module. Link the...

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      • Siren Marine Entry Sensor f\/Siren 3
        $139.09

        Entry Sensor for Siren 3 Receive instant notifications if there is unauthorized entry on the boat. Perfect for securing lockers, doors, and hatches. Install the Wireless Module on one side of the door or locker and the Open/Close Magnet on the other...

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      • Siren Marine Temp Sensor f\/Siren 3
        $139.09

        Temp Sensor for Siren 3 Monitor the temperature of the cabin, engine room, bait locker, or fridge. Place the Wireless Module in the area that needs to be monitored, link the module to the Siren 3 Pro, and receive alerts if the temperature exceeds or...

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      • Siren Marine Wiring Cable f\/Siren 3
        $21.83

        Wiring Cable for Siren 3 The Wiring Cable 2 accessory is used to connect additional wired sensor inputs and to also drive additional outputs to your Siren 3 Pro device. Each wire has unique functionality to support the corresponding sensor...

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      • Siren Marine Bilge Pump Sensor f\/Siren 3
        $139.09

        Bilge Pump Sensor for Siren 3 The Wireless Bilge Pump Sensor monitors bilge pump activity, including run time and daily cycles. Attach the Bilge Pump Connector to the bilge pump and plug the other end into the Wireless Module. Link the module to the...

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      • Siren Marine High Water Sensor f\/Siren 3
        $139.09

        High Water Sensor for Siren 3 The Wireless High-Water Sensor detects if there is water in the bilge and sends an alert to the Siren Marine App if water has risen above the preset level. Mount the Water Probe at the desired height in the bilge and plug...

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      • Siren Marine Siren 3 Pro Vessel Management Device
        $796.86

        Siren 3 Pro Vessel Management Device  Features: Providing the ultimate smart boating experience that keeps you connected to your boat 24/7, regardless of boat size, type or use The Siren 3 Pro provides the modern boating experience by...

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      • Siren Marine Wired Magnetic REED Switch
        $18.38

        Wired Magnetic REED Switch Magnetic reed switches are used to report unauthorized entry into a main cabin through a door or external hatch. Reed switches can be connected in series to monitor multiple entry points, providing secure protection against...

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      • Garmin OnDeck Hub
        $849.99

        OnDeck™ Hub BE THERE FROM VIRTUALLY ANYWHERE Track, monitor and control up to 5 switches on your boat with the OnDeck™ system, a fully integrated remote connectivity solution1. Features: Door open? Bilge running? Peace of mind comes in...

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      • Siren Marine Siren 3 Main Device
        $299.99

        Siren 3 Main Device Designed with small to medium boats in mind, the Siren 3 offers immense value at an affordable price. Together with the Siren Connected Boat Mobile App, our Smart Boat Monitoring System puts your boat in the palm of your hand 24/7...

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      • Siren Marine Wired Micro ePIR Motion Sensor
        $145.59

        Wired Micro ePIR Motion SensorThe Micro ePIR motion sensor provides similar functionality as the Visonic Duo 240  Ceiling Dualtech in the most compact and hard to detect package available. An ideal solution for monitoring a boat’s main...

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      Boat Alarms & Marine Security Systems

      Boat alarms help boat owners monitor important safety and security conditions while their vessel is docked, stored, or underway. Whether you need a marine security alarm to help deter unauthorized access or a high water alarm to alert you to rising bilge water, these systems provide early warning when quick action matters most.

      Marine alarm systems are designed to protect both your boat and the people aboard it. Security alarms can help reduce theft risk and alert you to intrusion, while water alarms help detect flooding conditions before they become serious.

      Types of Boat Alarm Systems

      Boat Security Alarms

      Boat security alarms are designed to help protect your vessel from theft or unauthorized entry. These systems may monitor doors, hatches, or movement and provide an audible or electronic alert when suspicious activity is detected.

      High Water Alarms

      High water alarms monitor bilge or compartment water levels and alert you if water rises beyond a normal range. These systems are an important safeguard for boats that are left in the water, helping owners respond quickly to leaks or pump failures.

      Bilge Alarm Systems

      Bilge alarms provide an added layer of flood protection by warning boaters when water accumulates in the bilge. They are often used alongside bilge pumps and float switches to improve onboard safety and monitoring.

      Why Boat Alarms Matter

      A reliable boat alarm system helps reduce the chance of unnoticed problems. Security alarms help protect valuable equipment and deter theft, while high water alarms can notify you of rising water before it causes major damage. For many boat owners, alarm systems are an important part of a broader safety and protection strategy.

      For gas, propane, and carbon monoxide monitoring, shop our marine vapor detectors designed to detect dangerous fumes in cabins and engine compartments.

      Shop Boat Alarms at Wholesale Marine

      Wholesale Marine carries boat alarms and marine alarm systems designed to help protect your vessel from both security threats and onboard water issues. Whether you're adding a theft deterrent system or installing a high water alarm for extra peace of mind, choosing the right alarm helps you monitor critical conditions and respond quickly when needed.

      Frequently Asked Questions About Boat Alarms

      What does a boat alarm do?

      A boat alarm monitors your vessel for security threats or safety issues and alerts you when a problem is detected. Depending on the system, a boat alarm may help deter theft, detect unauthorized access, or warn of rising water in the bilge.

      What is a high water alarm on a boat?

      A high water alarm is a device that monitors water levels in the bilge or another compartment and sounds an alert if the water rises too high. It helps warn boat owners of leaks, pump failure, or flooding conditions.

      Are boat security alarms worth it?

      Boat security alarms can be a valuable addition for owners who want added theft deterrence and better monitoring while their vessel is docked or stored. They can help alert you to unauthorized access and improve peace of mind.

      Do bilge alarms replace bilge pumps?

      No. A bilge alarm does not replace a bilge pump. Instead, it works alongside your bilge pump and float switch system by alerting you when water levels rise above normal conditions.

      What is the difference between a boat alarm and a marine vapor detector?

      Boat alarms typically monitor security conditions or rising water levels, while marine vapor detectors monitor dangerous gases such as fuel vapors, propane, or carbon monoxide. These systems serve different safety functions on board.