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40Hz Geophone with Reinforced Case

40Hz Geophone with Reinforced Case is an ideal choice for shallow seismic survey and it is mostly widely used in coalmine geological prospecting and exploration with the following features:

  • Good parameter consistency.
  • Firm mechanism structure.
  • Excellent sealability& stability.
  • Reinforced casing suitable for land ,snow, marsh and transition zone with Steel spike or Brass spike optional.
  • Assorted geophone connectors and geophone cables are available.
  • Compatible with various main stream seismographs such as Geometrics Geode, Strata Visor, Summit, PASI GEA24 and etc.
  • Also Suitable for multi-wave component seismic data acquisition.
  • 3-year limited warranty on basic element exclusive of high voltage, lightening or physical abuse.
  • GS-20DX,equivalent 40Hz geophone with reinforced case is also available.

We supply 40hz geophone sensor, geophone element, land cased geophone, triaxial geophone and multi-geophone string with KCK connector, KCLconnector, 408 connector, Kooter connector, MP16 connector, Split spring connector or Mueller clip connector. Lead wires from O.D 4.6mm to O.D 7.8mm available.

Click here and download data sheet of 40Hz geophone with reinforced case or contact us to get special discounts.

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40Hz Geophone with Reinforced Product Parameters


(Equivalent to SM-4,40hz)

ST-20DX, 40hz

(Equivalent to GS-20DX,40hz)

Natural frequency ( Hz )40 ± 5.0%40±5%
Open circuit damping0.6200.37
Damping with Shunt Resistor0.648 ± 5.0%0.576±5%
Open Circuit Intrinsic Voltage Sensitivity(V/m/s)32.542.0
Sensitivity with Shunt Resistor(V/m/s)30.3 ± 5.0%30.4±5%
Coil Resistance (ohm)540 ± 5.0%575±5%
Harmonic Distortion ( % )<0.2≦0.2
Typical Spurious Frequency ( Hz )≥300≧380
Moving Mass ( g )9.38.2
Max.coil excursion p-p (mm)1.81.5
Max.tilt angle20º20º
Element Diameter (mm)26.027.0
Element Height (mm)32.033.0
Element Weight (g)8095.0
Operating Temperature(℃)-40℃ to + 100℃–45℃ to + 100℃
Warranty Period3 year3 year
●  All parameters specified herein are rated at a temperature 20℃±2℃.
●  3-year limited warranty on basic element exclusive of high voltage, lightening or physical abuse.

* Other type of geophones are also available: SM-4 equivalent, SM-6 equivalent, SM-24 Eeuivalent, SG10 equivalent, GS-20DX equivalent, GS-32CT equivalent, GS ONE equivalent, 1Hz, 2Hz, 2.5Hz, 3Hz, 4Hz, 4.5Hz, 8Hz, 10Hz, 14Hz, 15Hz, 28Hz, 30Hz, 38Hz, 40Hz, 60Hz,80Hz and 100Hz geophones.

*  Specifications are subject to change without prior notice.

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