Name Short-period sensors (>1Hz)  
Country of Origin
Manufacturer
Dualuse open  
Customs tariff
Export Control Classification Number (ECCN)
Hazmat none

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Name Manufacturer CountryOfOrigin Dualuse CustomsTariff Eccn Hazmat
Short-period sensors (>1Hz)      open      none 
Mark L-4C-3D 1Hz Geophone 3-C  Sercel    open      none 
4.5Hz Geophone 3-C  Sensor Netherland / HGS (India)  IN  open      none 
4.5Hz Geophone vertical      open      none 
10Hz Geophone vertical (Müller clips)       open      none