MGL Avionics

Artificial Horizons & Advanced Compasses

Highly Innovative - Industry Leading Performance

Inertial and Magnetic Sensor Products

MGL Avionics offers several inertial and magnetic sensors to support various MGL Avionics instruments, as well as the standalone 2.25" Infinity Singles display system and the 3.5" Velocity Singles display system.

Both of the Singles display units fit straight into standard 2.25" and 3.5" instrument cut outs and utilise the same remote sensor modules (SP2/SP4/SP5 - described below). See the image of the 3.5" Velocity AV-2 display unit to the Left - the Infinity display has the same appearance, but, is smaller. Both Singles displays are useable configurable (menu selection) to show AH or heading or both in the one display. Their are a variety of other display options by menu selection.

The manuals for the Velocity and 2.25" Infinity (AV-1) can be downloaded by clicking on the links below:

Velocity 3.5" display manual; and

Infinity 2.25" display manual

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The sensor modules are also used with the complete range of MGL Avionics EFIS systems (with AH/heading capabilities (see table later in this page).

These sensors are also available from a number of OEM users for use with their avionics. If you are using any of these sensors together with avionics not made by MGL Avionics, please view documentation from your avionics manufacturer regarding operating and installation details. View the documents available from this page as supplementary only.

SP-2 magnetometer/electronic compass

The SP-2 contains a three axis magnetic field sensor and a 2 axis accelerometer. Featuring a high resolution 16 bit measurement system a powerful ATMega processor is used to output tilt compensated heading information. If a SP-4 AHRS is used on the same airtalk communications link, tilt compensation can be performed using gyro data.

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SP-4 AHRS (Attitude and Heading reference system)

The SP-4 contains 3 MEMS gyros and 3 MEMS vibrating body accelerometers. Using a 16 bit data acquisition subsystem a powerful ARM7 32 bit processor is used to provide stabilized attitude information. Together with a SP-2 magnetometer on the same airtalk communications link the gyro heading can be automatically slaved to the magnetic heading.

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SP-5 AHRS (Attitude and Heading reference system)

The SP-5 contains 3 high grade RING gyros and 3 MEMS vibrating body accelerometers. Using a 16 bit data acquisition subsystem a powerful ARM7 32 bit processor is used to provide stabilized attitude information. Together with a SP-2 magnetometer on the same airtalk communications link the gyro heading can be automatically slaved to the magnetic heading.

The SP-5 is intended for applications requiring exceptional, professional level performance from the AHRS system. The SP-5 is based on RING gyros designed by British Aerospace (now BAe Systems).

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Each of the sensor modules can be used as described and with the systems noted below:

SP-2 magnetometer

Stratomaster AV-1 - magnetic heading
Stratomaster AV-2 - magnetic heading
Stratomaster Ultra H - magnetic heading
Stratomaster Ultra HXL - magnetic heading
Stratomaster Enigma - magnetic heading, wind speed and direction
Stratomaster Voyager - magnetic heading, wind speed and direction
Stratomaster Odyssey - magnetic heading, wind speed and direction

SP-4, SP-5 AHRS

Stratomaster AV-1 - attitude, turn&slip
Stratomaster AV-2 - attitude, turn&slip
Stratomaster Ultra H - attitude, turn&slip
Stratomaster Ultra HXL - attitude, turn&slip
Stratomaster Enigma - attitude, turn&slip, G-force
Stratomaster Voyager - attitude, turn&slip, G-force
Stratomaster Odyssey - attitude, turn&slip, G-force

Inside the SP-2 magnetometer:

Inside the SP-4 AHRS:

Inside the SP-5 AHRS:

Downloadable manuals:

SP-2 and SP-4 User and installation manual (Approximately 400 KBytes, PDF format)

SP-2 and SP-5 User and installation manual (Approximately 350 KBytes, PDF format)

SP-2 OEM documentation - communication message formats  ( Approximately 140 KBytes, PDF format)

SP-4 Attitude & Heading Reference System (Approximately 446 KBytes, PDF format)

Previous generation AHRS OEM document (Approximately 460KBytes)


Please Note:

Operation of Stratomaster Instruments is the responsibility of the pilot in command of the aircraft. The pilot in command has to make himself/herself familiar with the operation and limitations of the Stratomaster instrument(s) before commencing ground or flight operations. Under no circumstances does the manufacturer condone usage of this instrument for IFR operations.

These instruments are designed for use in ultralight, microlight, experimental and homebuilt aircraft as well as any aircraft that permit use of such (non certified) instrumentation under general or special operating permits. Stratomaster Singles Instruments have Not been submitted to CAA or FAA or any of its agencies (or any regulatory authority in any other country) for any form of certification. Operation and installation of these instruments is subject to the relevant rules and regulations of your country and flight authority.

If any of the above is not acceptable to the pilot in command he/she must refrain from operating the aircraft or remove any Stratomaster Instruments from the aircraft before commencing aircraft operations.

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