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Item Geophone
Item code
Manufacturer Texas Instruments
Donor Charlie Klutts
Location HGC
Serial number NMI-21"NMI" can not be assigned to a declared number type with value -21.
Taxonomy IMG2172
  1. 21. Solid brass case has two insulated solder contacts protruding through top plate. Unit rests on tripod like base machined as part of case. Around case, at bottom, is stamped TYPE S-35 SEISMOMETER, the TEXAS INSTRUMENTS logo, MADE IN USA SERIAL NUMBER and stamped in separately are the numbers 2392. Printed on the bottom is TI 23 within a circle.

GSH IMG2172.jpg