Revolutionary accuracy, downsized.

USB Barometer: High precision pressure sensor with standard USB connector and
NMEA output.
For use with WinGPS 6 Pro, Voyager or Inland (from edition 2025), or another navigation app such as Marine Barograph app from Starpath.
Accuracy is equivalent to the very best of marine barometers.

How does it work?
Finally there is no reason that every boat and every household does not have access to affordable accurate barometric pressure, which is crucial to weather analysis and forecasting. Especially valuable to mariners and those who have medical concerns about the pressure, i.e., those who do not want just a pressure reading, they want the right pressure reading.
The output is in standard NMEA sentences (XDR, MDA) so the pressure can be read and displayed by any computer navigation program, such as WinGPS 6 Pro, Voyager or Inland (from edition 2025).

The device is shipped in a white metal case (18x60x87mm) for safe storage and transport to other vessels, which includes a QR code to download the Marine Barograph app.

Images of data in WinGPS 6



Revolutionary accuracy
The device is accurate to better than ± 1.5 mb over the full range of ocean or terrestrial pressures at standard temperatures, and generally better than that at elevations below 600 meters. However, if more precise accurate pressure is known, the device can be calibrated by the user at one point (essentially just an offset that applies to all pressures) or if two precise values are known at two pressures more than 30 mb apart, then a two point calibration can also be entered, which adds a slope to the calibration data. Plus there is always the option to return to the factory calibration, set in reference to two NIST traceable standards. Or one can choose to view the pressure offset by a fixed amount set within the Marine Barograph or nav app, without affecting the calibration of the sensor itself. With known elevation, you can choose to show sea level or station pressure.