The model G-822A cesium airborne magnetometer provides unmatched versatility of performance, size, function, and cost effectiveness. The G-822A sensor uses a precise, proven design with carefully selected and tested components to ensure the very best specifications in sensitivity, noise, heading error and absolute accuracy.

The G-822A magnetometer outputs a Larmor frequency that corresponds to the strength of the local magnetic field. This Larmor frequency is counted by a user-supplied counter or a professional compensator such as the RMS Instruments AARC500 Automatic Digital Compensator.

The sensor and electronics package is weatherproof, temperature controlled, and delivers full performance under extreme operating conditions. With a proven record of stable and reliable operation over long periods, the G-822A is the industry standard for manned aircraft and large-unmanned aircraft surveys.


Features and benefits

  • Versatile Multi-Sensor Array Capability: This instrument can be used in fixed wing, helicopter or land applications to fit any surveyor’s needs.
  • Highest Sensitivity: Measure the smallest variations in the magnetic field.
  • Fast Sampling: Better coverage at faster speeds.
  • Very Low Heading Error: Get very clean, repeatable measurements without fear of instrument noise impacting the data.
  • Low AC Field Interference: Survey next to power lines when necessary.
  • Rugged and Reliable: Weatherproof. Survives three-foot drop onto hard surface.
  • Ultra-stable: No need to calibrate sensors.
  • Export Version Available: Use anywhere in the world without need for an export license (except embargoed countries). See specifications.

Technical Details



  • In-Accessible Terrain: Difficult or dangerous terrain is no longer a problem, making it perfect for surveying wetlands, heavily vegetated areas, extreme terrain, or protected lands.
  • Environmental: Find abandoned wells, pipes, and storage tanks quickly and with precise positioning.
  • Archaeology: Survey vast distances and leave potential archaeology sites undisturbed from the air.
  • Geology: Survey for regional variations in the magnetic field.
  • UXO Detection: Collect data at high speed with a fast sample rate, making detection and delineation of UXO quick and easy.