Geophysical instruments, seismometers, magnetometers and gravimeters for studying the earth and finding minerals and oil.

Some instruments are export controlled; provide specifications and licences where required. Measuring and survey instruments are precision goods: pack in padded cases with silica gel, state accuracy class, range and resolution, provide calibration certificates traceable to national standards, CE/BIS marks for electronic units, and keep lithium batteries under dangerous goods rules; some navigation and geophysical instruments are export controlled.