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Item Geophone
Item code
Manufacturer Mandrel Industries
Donor Charlie Klutts
Location HGC
Serial number NMI-23"NMI" can not be assigned to a declared number type with value -23.
Taxonomy IMG2174
  1. 23. Double geophone construction by Mandrel Industries. Two part plastic case is secured by knurled screw-on rings at each end. Stainless steel clamp further secures case and contains, at bottom, a threaded stud for coupling attachment. Case is filled with silicone rubber. Plastic case is stamped with name MANDREL INDUSTRIES and Mandrel logo.

GSH IMG2174.jpg