Construction, Mining and Pile Driving
- During construction, geophones provide a convenient method for checking the integrity of concrete piles, pads and structures.
SM-6
- The SM-6 geophone is a long coil travel version of the time-proven SM-4 geophone.
The extra coil travel offers an advantage for higher tilt requirements and where larger amplitude signals may be encountered, for example, in industrial vibration monitoring. A range of natural frequencies is available from 4.5 Hz to 14 Hz, providing choice of the correct geophone for a wide variety of applications. The SM-6 can be supplied in vertical, horizontal, and omni-directional orientation. Other specialized versions are available upon request, for example, Galperin (54.7°), 45°. The SM-6 is an ideal choice for the shear-wave horizontal elements, partnering an SM-4 vertical geophone in a 3-component package.
A variety of ION Sensor cases can accommodate the SM-6 geophone elements, making them suitable for an extensive range of field and industrial applications.
SM-11 Geophone
- The SM-11 geophone is suitable for use in extended frequency, high-resolution surveys. It has a
natural frequency of 30 Hz and a spurious frequency of over 500 Hz, providing a sensor suitable for
use with 1-ms sampling recording systems. The use of a special magnetic circuit makes the output
of this geophone higher than normal 30-Hz geophones, ensuring adequate signal strength. The high
natural frequency spring design also allows this geophone to be used in any orientation (vertical,
horizontal, or inverted).
The SM-11 can be installed in the ION Sensor PE-11 land case.
Typical application: high-resolution seismograph reflection studies.
LF-24 Low Frequency Geophone
- The LF-24 Low Frequency Geophone is optimized for size and performance where weight and cost
are important factors in vibration monitoring and low-frequency seismic measurement. The device
uses a low-power electronic circuit to provide reverse filtering function below the geophone’s natural
frequency, extending the recording bandwidth down to 1 Hz. The compensation circuit permits the use
of a higher natural frequency geophone, allowing for high shock peaks that could seriously damage
conventional low-frequency geophones. The electronics are fully potted in epoxy resin for reliability;
a 5-pin, water-tight connector is provided for signal output and power supply. The low-impedance output
matches many recording devices, and the electrical load will not affect the damping characteristics.
Applications: vibration monitoring, low-frequency seismic measurement, blast monitoring, vibration
measurement of buildings, & site engineering.
