Digital Attitude Sensors

An electronic compass able to sense both direction and pitch and roll also in GPS denied environments.

Unlike a GPS it doesn’t have to be moving to determine azimuth. Achieving high level of accuracy without any communication with external references like cell towers or satellites. Rugged, requires very little power and has no moving parts. Weatherproof enclosures are available.

Relevant applications include manned and unmanned vehicles (UV, UAV), robotics, weather buoys, antenna positioning, platform stabilization, marine navigation, excavation machinery, and irrigation equipment and more.

Current product offering includes PNI TCM, PNI Prime and True North Revolution series.


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True North Revolution 2X

The Revolution 2X is similar to True North’s standard Revolution electronic compass but with double the speed. The measurement cycle rate is 27.5 Hz, compared to 13.75 Hz for the standard Revolution. The electronic compass is fully compatible with existing PC software.

The range and resolution for all time-based parameters (tilt and magnetic filter time constants, sample time, etc.) is the same as for the standard Revolution: the range is 0 to 18.5 seconds, and resolution is 73 msec. All existing NMEA data rates are supported, and additional rates of 1650 and 2400 sentences per minute have been added. Existing serial baud rates are also supported, and an additional rate of 38,400 baud is provided.

True North Revolution GS

If your compass application involves vibration, acceleration, uneven terrain, or rough seas, you will find the True North Revolution GS electronic compass to be an uncompromising solution that will outperform rival units costing considerably more. The GS provides remarkably accurate heading, pitch, and roll in dynamic conditions. It all starts with a precision 3-axis solid-state magnetometer. Two angular rate gyros independently stabilize pitch and roll. They augment a dual-axis electrolytic tilt sensor that provides precise tilt measurements in static environments. Two sets of independent filters, one set for pitch and one for roll, combine gyro and electrolytic sensor measurements to provide the best available tilt measurements.

The recommended applications for the GS are manned and unmanned vehicles, robotics, weather buoys, antenna positioning, platform stabilization, marine navigation, excavation machinery, and irrigation equipment.

True North Revolution AV

The Revolution™ AV (TNT4000) is a strap-down electronic compass designed specifically for commercial, industrial and military users requiring high accuracy, repeatability, and low power consumption in dynamic environments.  The Revolution AV is the latest addition to True North’s family of Revolution electronic compasses that have an unparalleled reputation for quality and performance. An enhanced version of True NorthRevolution GS, the AV includes a full suite of precision, 3-axis, MEMS rotation rate, acceleration, and magnetic sensors and a dual-axis electrolytic tilt sensor (for the ultimate in near-level accuracy).  All 11 sensor measurements are calibrated over a -50° to 110°C temperature range and aligned in three dimensions.  In addition to azimuth output, all raw and calibrated measurements are available at up to 28 readings per second.

The AV’s sensor suite consists of the following: 3-axis angular rate gyros, 3-axisaccelerometer, 3-axis magnetometer, 2-axis liquid eTilt sensor

The recommended applications for the AV are manned and unmanned aerial and underwater vehicles, but it can also be appropriate for robotics, weather buoys, antenna positioning, platform stabilization, excavation machinery, and irrigation equipment.  For cost sensitive applications, the rate gyros and eTilt are optional sensors that can be eliminated if not needed.