• The SMT-40 geophone string checker is a hand-held unit, allowing a quick
  and efficient method of checking geophone string resistance, impedance,
  and polarity. String parameters are pre-configured by software and any
  deviation from the nominal values are displayed on a liquid crystal display
  (LCD) panel meter. The measurement is temperature compensated and
  has an audible tone for geophone polarity warning.
  Using the SMT-40 on the line, supported by the SMT-400 Geophone Tester
  to analyze any faults detected, ensures complete quality control of geophone
  strings.

SMT-40 Geophone String Checker, Sheet-SMT-40(E)

• The fifth generation SMT series Geophone Tester which again sets the industry standard for geophone and string testing. The SMT-400 utilises the latest advances in analogue and digital electronics including a high resolution 24 bit Sigma-Delta A/D converter which provides both speed and accuracy in the data collection process. Available in any user requested language (reset defaults to English). A high capacity replaceable Li-ion standard battery offers over 8 hours of continuous operation.

SMT-400, Sheet-SMT-400

• This fourth generation of the SMT series geophone tester is equally at home in the laboratory or field environment, and again sets the industry standard for testing geophone strings or individual elements to manufacturer’s standards. An internal NiMH battery will power the SMT-300 for over 20 hours of continuous operation and the versatile onboard charger can accommodate 12 – 30 VDC. (110 - 230 VAC adaptor provided) When the fast-charge mode is selected, your SMT-300 can be recharged and ready to use in as little as 2 hours. The water resistant, rugged aluminum body of the tester, improved durability keypad and provided custom carrying case ensures that your SMT-300 will provide all the reliably and performance that you demand for years to come.

SMT-300 Tester, New SMT-300 Brochure2

• The GRIP Geophone String Analyzer is a hand-held unit, allowing a quick and efficient method of
  checking Geophone string Resistance, Impedance, and Polarity (GRIP). It is calibrated to match string
  parameters by a plug-in module, and any deviation from the nominal values are displayed on a panel
  meter. The unit is temperature compensated and has an audible tone for polarity and low battery
  warning.
  Using the GRIP on the line, supported by the SMT-300 Geophone Tester to analyze any faults
  detected, ensures complete quality control of geophone strings.
  The GRIP can also be configured for checking hydrophone parameters and in combination with
  the SHARP Hydrophone Tester offers quality assurance for hydrophone units.
  

GRIP Geophone String Analizer, GRIPStringChecker