LT-500 AHRS Heading Sensor
LT-500 AHRS Heading Sensor
LT-500 AHRS Heading Sensor
LT-500 AHRS Heading Sensor
LT-500 AHRS Heading Sensor

Electronic Compass

  • LT-500 AHRS

    Key Features:
    • Attitude Heading Reference System with 11 precision sensors
    • True heading, magnetic heading, deviation, variation, roll, pitch, air pressure, and temperature
    • Display and control buttons for installation and service
    • Simultaneously NMEA 0183 and NMEA 2000 data
    • Configurable NMEA 0183 sentences (enable/disable, talker ID, output rate)
    • Easy configurable NMEA 2000 termination resistor (open or terminated)
    • Easy configurable NMEA 0183 data rate (4800 or 38400 baud)
    • Mount in any orientation without compromising the high performance
    • Each unit is factory calibrated and functional tested over temperature prior to shipment
    • Worldwide maritime certification

  • LT-500 AHRS

    • Certification & standards: CE, IEC 60945, IEC 60950, FCC, IC, RCM, RoHS, NMEA 0183, NMEA 2000
    • Dimensions: 91.6 x 75.3 x 32.7 mm (3.61 x 2.96 x 1.29 in)
    • Weight: 104 g (0.23 lbs)
    • Temperature (ambient), operational: -25°C to +55°C (-13°F to +131°F)
    • Temperature (ambient), storage: -30°C to +80°C (-22°F to +176°F)
    • Waterproof: IP42 / Humidity: 95% non-condensing @ 40°C
    • Communication Interface: 8-pin female connector for NMEA 0183, NMEA 2000 and power
    • Input power: 9-40 VDC
    • Power consumption: < 1W
    • Load Equivalent Number (LEN): 2
    • Compass safe distance: 0.3 m (1 ft)

  • LT-500 AHRS

    In the Box:
    • LT-500 AHRS
    • 10m Cable Multi 8-pin Simple-Cut (M)
    • Screw-in Conn. NMEA 2000 Micro-C (M)
    • Quick Installation Guide
    • Safety Instructions Sheet
    • Unit Test Sheet


The LT-500 Attitude Heading Reference System (AHRS) unit is a maritime navigation electronic compass / heading sensor from Lars Thrane A/S. The LT-500 AHRS unit is designed for the leisure as well as the professional maritime markets. The LT-500 unit meets all standards and certification requirements needed for worldwide maritime navigation equipment.

The LT-500 AHRS unit is a small, compact, and very advanced unit with 11 precision sensors. With the use of sensor-fusion and Kalman filtering, the LT-500 AHRS unit outputs: true heading1, roll, pitch, air pressure, and temperature real-time, with high precision and resolution. The LT-500 AHRS unit includes advanced technologies such as:

  • Kalman filtering
  • Calculation of magnetic variation based on the World Magnetic Model (WMM)
  • Compensation of soft and hard iron (deviation)
  • Built-in magnetometer calibration algorithm

The LT-500 AHRS unit is designed and built for the demanding and rough environment at sea and with an operational temperature range from -25⁰C to +55⁰C (-13⁰F to +131⁰F).

The LT-500 AHRS unit is easy to mount and supports NMEA 0183, NMEA 2000, and power on a single cable. Without compromising the high performance, the LT-500 AHRS unit may be installed in any position. The LT-500 AHRS units has a built-in user interface (display and control buttons) for installation and service. Navigation output from the LT-500 AHRS unit is available in the user interface. The LT-500 AHRS unit supports automatic levelling (pitch and roll), which can be used during the installation. The built-in magnetometer calibration algorithm will compensate for deviation, and the LT-500 AHRS unit will output reliable navigation data. The external PC installation and service software is available for optional configuration and maintenance of the LT-500 AHRS unit.

More than 40 years of experience have been put into the design and construction of the advanced LT-500 AHRS unit, with an exceptional performance and specification level.

Where to buy the LT-500 AHRS Electronic Compass

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CFO and Co-Founder

After having earning his engineering degree Hans joined Thrane & Thrane in 2003 as a young development engineer.
During his time at Thrane & Thrane Hans has been involved in DSP programming, type approvals and project management.
His area of responsibility was within maritime and aeronautical mobile satellite communication.

Hans left Thrane & Thrane in the summer of 2014 to be part of the new founding team at Lars Thrane A/S.
Hans Thrane holds a Bachelor Degree in Electronic Engineering from the Technical University of Danmark.

Phone: +45 88 30 10 11


CTO and Co-Founder

Carsten joined Thrane & Thrane in 1997 as a young hardware development engineer. Throughout the years he grew to a position within Thrane & Thrane as a Senior Project Manager within the Maritime Development Unit.

During his time at Thrane & Thrane Carsten has been working on all levels of development and business development within Maritime, Land mobile and Aeronautical Terminals.

Carsten holds a Yachtmaster, 3rd class certificate and a SRC Certificate.
In his spare time, he likes to sail, dive and hike in the mountains.

Carsten holds a Higher National Degree in electronics engineering and a PMI Certification in Project Management.

Phone: +45 88 30 10 12


Chairman and Founder

Lars Thrane established Lars Thrane A/S in the summer of 2014.

Lars originally founded Thrane & Thrane in 1981 and has as CEO and technical Mastermind been the main creative and management force behind the very successful growth and performance of the company in its first 30 years. Under Lars’ leadership, Thrane & Thrane developed a reputation as the leading manufacturer of mobile satellite communications in the world.

In addition to Lars’ accomplishments at Thrane & Thrane, he is also a passionate pilot, holding certificates for multi-engine turbine powered aircraft and helicopters.

Lars holds a Master of Science Degree in Electronics Engineering and a Ph.D. in Satellite Communications from the Technical University of Denmark

Phone: +45 88 30 10 20


CEO and Co-Founder

Peter Thrane was a co-founder of Lars Thrane A/S in the summer of 2014.

Peter has 10 years of experience with development of satellite communication equipment from Thrane & Thrane. Peter has worked with maritime, land and aeronautical satellite communication development programs. Most recently he has worked on an aeronautical FAA Level-D DO-178C/DO-254 certification project.

Privately, Peter holds a certificate on a single engine piston aircraft and holds a maritime Yachtsman of 3rd degree.

Peter holds a Master of Science Degree in Electronic Engineering from the Technical University of Denmark

Phone: +45 88 30 10 10


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