2525 Brunswick Ave, Suite 205
Linden,  NJ  07036,  USA
Tel:   908-474-9595
Fax: 908-474-9090

Compasses, Solid State Inclinometers, Directional Probes, Electrolytic Tilt Sensors

EZ-COMPASS-4V   vertical version

Tilt Compensated Compass


Low cost SOLID STATE advanced Pitch / Roll / Temperature compensated COMPASS / MAGNETOMETER system is built around a state of the art CMOS microcontroller utilizing AOSI’s proprietary algorithm on a 0.9″ x 2″ assembled PCB.

The unit outputs continuous heading, magnetic field, dual axis tilt and temperature data over the standard USB, RS-232TTL,RS-232 rider PCB, RS-422 and  RS-485* interfaces. The AZIMUTH is generated from a 3 axis semiconductor magnetometer with 12 bit ( 0.08 deg ) resolution. The LINEAR tilt information is available with 12 bit resolution for +-90arcdeg in both Pitch and Roll axis ( +-180 deg optional ). COMPASS/TILT module is perfectly suitable for numerous navigation, antenna orientation, borehole profiling, research, training, construction, entertainment and other precision orientation,  and leveling applications.

The COMPASS is able to output multi-sensor information in NMEA-0183 mode and responds to numerous generally used commands. Easy link through the Hyper Terminal Windows accessory facilitates custom calibration, hard iron compensation, data acquisition, data averaging, scan delay, dumping factor and data display.

Compass is also available in a special logging version EZ-COMPASS-4L.

Manual is located in a LIBRARY section.




Azimuth Range 0–360 deg, continuous
Azimuth Resolution 12 (0.08) bit (deg)
Azimuth Repeatability < 0.25 deg, typical vertical
Azimuth Accuracy < 1.0 deg, typical vertical, calibrated, not tilted.
Magnetic Field +-2 Gauss typical
Magnetic Resolution < 1 mGauss typical
Pitch Range +90 to -90 arcdeg after linear correction
Roll Range +180 to -180 arcdeg after linear correction
Weight 7 grams
Dynamic Range 10 reading/sec
Tilt Resolution 12 bit full scale, both axis
Tilt Repeatability <2 bits
Temperature -40 to +85 deg C
Communication 1200–115,200 baud,8,N,1 RS-232 and RS-422 standards
Supply 8—15 Vdc
Size 0.9″W x 2″L x 0.5″H PCB Board
NMEA-0183 mode 5 select modes 1999 Revision

*  RS-232 or RS-485 are activated upon special request
SOFT NORTH: North direction could be manually reset by software to compensate for local declination angle.
Special cable for PC interfacing is available. Unit should be locally calibrated.
Specifications of sensors may change without notice.


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