Geophone 28Hz

Type

EG-28 ( Equivalent to GS-20DX 28Hz )

Natural frequency ( Hz )

28±5%

Open circuit damping

0.27

Damping with calibration shunt

0.552±5%

Calibration shunt resistance(ohm)

1000

Open circuit sensitivity (v/m/s)

39

Sensitivity with calibration shunt(v/m/s)

28±5%

Coil Resistance (ohm)

395±5%

Harmonic Distortion ( % )

≦0.2

Typical Spurious Frequency ( Hz )

≧350

Moving Mass ( g )

11

Max.coil excursion p-p (mm)

1.5

Max.tilt angle

20º

Element Diameter (mm)

25.4

Element Height (mm)

33

Element Weight (g)

100

Operating Temperature（℃）

-40℃ to +80℃