SailSensor Pressure measures the differential aerodynamic pressure directly on the sail surface: not a generic value, but the load difference between the windward and leeward sides. It is the data that truly describes how the sail is working. Wireless BLE, fitted without piercing or damaging the sail.
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A sail generates lift thanks to the pressure difference between its two sides: suction on the leeward side, overpressure on the windward side. Measuring the pressure on a single side says little; measuring the difference between windward and leeward reveals the real aerodynamic load, point by point across the surface.
This is the proprietary principle of SailSensor Pressure: reading the work of the sail through an objective physical measurement, instead of relying on the eye or feel alone. Learn more about the differential pressure principle ›
Compact, low-profile sensors are fitted onto the sail with minimal impact on the airflow. Each sensor transmits the differential pressure to the app via BLE, which turns it into an aerodynamic map you can read in real time.
Wireless fitting that does not pierce or damage the sail: it installs and removes without any invasive work.
The differential windward/leeward reading reveals the actual aerodynamic load along the sail surface.
Objective data lets you compare settings and find the best sail shape again in any condition.
The pressure data flows into the SailSensor app for Android (iOS version in development), which displays it as a pressure map on the sail and as navigation telemetry. Sessions can be stored to review your outings and monitor how they evolve over time.
With SailSensor Bridge the same data can be brought onto the boat's NMEA 2000 network.
It measures the differential aerodynamic pressure between the windward and leeward sides of the sail, that is, the real load that generates lift, directly on the sail surface.
No. The sensors are fitted onto the sail without holes and without damaging it, and can be removed without leaving any invasive work behind.
With the SailSensor app for Android (the iOS version is in development). The app receives data via BLE and displays it in real time as a pressure map.
No. SailSensor is not a security, tracking or anti-theft system: it is a racing instrument that measures the aerodynamic pressure on the sail to optimise trim. See the disambiguation FAQ.