Sensar Marine
About Sensar Marine
Founded in 2018 and headquartered in Lexington, Massachusetts, Sensar Marine set out to solve one of boating's most persistent anxieties: not knowing what's happening to your vessel when you're not on board. Their answer is an integrated smart sensor ecosystem that connects directly to your boat's critical systems and streams live data straight to your smartphone — around the clock, every day of the year.
Sensar Marine electronics and accessories are built around the flagship Boat Monitor, a compact, waterproof (IPX7) device that acts as the nerve center of the entire system. The Boat Monitor is the system's brain — where data from your boat is continually collected and sent to your app. It features an integrated GPS antenna, a 4G modem with SIM card, and an onboard accelerometer that tracks movement and impact. The companion smartphone app gives boaters a full, real-time dashboard of their vessel's condition, along with 30 days of historical sensor data so you can spot trends before they become problems.
One of the most practical features for any boat owner is bilge oversight. Sensar Marine's Bilge Sentry add-on pairs seamlessly with the core monitor to provide continuous insight into what's happening below the waterline. The system tracks electric bilge pump activity — logging exactly when the pump ran and for how long — and sends immediate alerts if unusual activity is detected. Water in the bilge is one of the earliest warning signs of a serious problem, and Sensar Marine ensures you know about it whether you're at the dock or hundreds of miles away.
Keeping tabs on your boat's electrical health is equally important, and Sensar Marine addresses this through dedicated battery monitoring built right into the system. The monitor tracks voltage across your battery banks and sends notifications the moment levels drop to a critical threshold — helping prevent the dead-battery surprises that strand boaters or lead to expensive equipment damage. The optional Expansion Hub extends this capability even further, supporting monitoring across up to six battery banks via a simple software update.
What truly sets Sensar Marine apart is the thoughtfulness of its design. The system runs on an internal battery with over 50 days of standby power and recharges itself automatically whenever the boat's batteries are being charged — making it completely maintenance-free. Installation is a genuine DIY affair, requiring no special tools and taking roughly 15 minutes. All components use plastic construction to eliminate rust risk in harsh marine environments, and the entire system is engineered to Nordic maritime standards.
For boaters who want peace of mind without complexity, Sensar Marine delivers a purpose-built solution that keeps you informed, prepared, and connected — no matter how far from the water you happen to be.