| Customization: | Available |
|---|---|
| Natural Frequency: | 28Hz |
| Geophone Type: | P Wave or S Wave Optional |
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Geophone 28Hz with Reinforced Land 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:
We supply 28Hz geophone element, single geophone, geophone array and multi geophone string with KCK connector, KCL connector, 408 connector, Kooter connector, MP16 connector, Split spring connector and Mueller clip connector optional as the lead connector. Geophone leader cable from O.D 4.6mm to O.D 7.8mm available.
| Type | ST-20DX, 28hz (Equivalent to GS-20DX,28hz) |
| Natural frequency ( Hz ) | 28±5% |
| Coil Resistance (ohms) | 395±5% |
| Open circuit damping | 0.27±5% |
| Damping with Shunt Resistor | 0.552±5% |
| Calibration Shunt Resistor(ohms) | 1000 |
| Open Circuit Intrinsic Voltage Sensitivity(V/m/s) | 39.0±5% |
| Sensitivity with Shunt Resistor(V/m/s) | 28.0±5% |
| Harmonic Distortion ( % ) | ≤0.2 |
| Typical Spurious Frequency ( Hz ) | ≥350 |
| Moving Mass ( g ) | 11.0 |
| Max.coil excursion p-p (mm) | 1.5 |
| Max.tilt angle | 20º |
| Element Diameter (mm) | 25.4 |
| Element Height (mm) | 33.0 |
| Element Weight (g) | 100.0 |
| Operating Temperature(ºC) | --45ºC to + 100ºC |
| Warranty Period | 3 years |
| - All parameters specified herein are rated at a temperature 20ºC±2ºC. | |
| - 3-year limited warranty on basic element exclusive of high voltage, lightening or physical abuse. | |
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