Measuring instruments | Pasisrl
GEOPHONES

GEOPHONES

Geophones used in geophysics are sensors designed to detect ground movements or seismic waves. The sensitive element is similar to a microphone, but capable of detecting even very low frequencies (up to 1 or 2 Hz) and transforming the detected signal into an electrical impulse. In fact, an electromagnetic geophone generates a current when the arrival of the seismic wave, artificially produced in the ground by a controlled seismic source or spontaneously produced by a natural or anthropic source, determines the relative motion of a coil inside a magnet. This current is transmitted to the seismograph, which displays and records the seismic waves arriving from multiple sensors, arranged along a line.
The choice of a geophone is fundamental in order to guarantee a high quality of the data acquired in the countryside, a basic condition for a more immediate, expeditious and accurate interpretation of the results.
Different methods of seismic investigation have been developed in order to provide information on soil stratigraphy, its density and on the elastic properties of the subsoil. These include the use of geophones with different characteristics and frequencies. Both vertical and horizontal sensors are used to capture and reconstruct the different components of the seismic wave itself, as well as a group of 3 sensors oriented along a set of Cartesian axes (3D surface geophones and 3D borehole geophones).

Each sensor is placed in a robust shell (or case) and equipped with a rod that allows it to be driven into the ground. Alternatively, special bases are available for use on asphalt and other rigid substrates. 3D geophones (also known as 3C or "3-component” geophones) find space inside special housings suitable for use on the surface or in the borehole.
 
Models
Methodologies

E-Commerce non attivo in questo momento

 

AVAILABLE MODELS

VERTICAL 10HZ GEOPHONE
VERTICAL 10HZ GEOPHONE

In standard shell, 75mm steel rod, 1m cable terminated with split spring connector (single clip). For use on asphalt and rigid surfaces, we recommend using it with a special universal base (to be ordered separately).

HORIZONTAL 10HZ GEOPHONE
HORIZONTAL 10HZ GEOPHONE

In horizontal shell with bubble level, 75mm steel rod, 1m cable terminated with split spring connector (single clip). For use on asphalt and rigid surfaces, we recommend using it with a special universal base (to be ordered separately).

VERTICAL 4.5HZ GEOPHONE
VERTICAL 4.5HZ GEOPHONE

In standard shell, 75mm steel rod, 1m cable terminated with split spring connector (single clip). For use on asphalt and rigid surfaces, we recommend using it with a special universal base (to be ordered separately).

HORIZONTAL 4.5HZ GEOPHONE
HORIZONTAL 4.5HZ GEOPHONE

In horizontal shell with bubble level, 75mm steel rod, 1m cable terminated with split spring connector (single clip). For use on asphalt and rigid surfaces, we recommend using it with a special universal base (to be ordered separately).

VERTICAL 28HZ / 40HZ GEOPHONE
VERTICAL 28HZ / 40HZ GEOPHONE

In standard shell, 75mm steel rod, 1m cable terminated with split spring connector (single clip). For use on asphalt and rigid surfaces, we recommend using it with a special universal base (to be ordered separately).

VERTICAL 50HZ/100HZ GEOPHONE
VERTICAL 50HZ/100HZ GEOPHONE

In standard shell, 75mm steel rod, 1m cable terminated with split spring connector (single clip) (to order). For use on asphalt and rigid surfaces, we recommend using it with a special universal base (to be ordered separately).

3D LAND GEOPHONE
3D LAND GEOPHONE

2Hz and 4.5Hz - sensor triad in standard 3C shell with bubble level and 3 steel 75mm rods, 1m of cable terminated with 3x single “split spring” for seismic cable (version available upon request with Cannon connector for direct connection to the seismograph).

3DLG-2
3DLG-2

The 3D Land Geophone 3DLG-2 is the ideal accessory to add to your seismic instrumentation and perform HVSR, MASW and Vibration Analysis. One vertical and two horizontal high-performing sensors, with 2Hz resonance frequency and properly coupled, are mounted in a robust waterproof case, delivered with adjustable feet and inter-changeable rods.

GFA
GFA

Borehole 3D Geophone Mod. GFA 50/100 is built with 3 high-sensitivity geophones (nat.freq.10 Hz- 1 vertical and 2 horizontal sensors) oriented according to a triad of orthogonal Cartesian axes XYZ. Supplied with a cleat assembly to sustain its weight at the requested depth (GFA cable is graduated in meters), this borehole geophone has a pneumatic-mechanical clamping system with lateral lever and spacer block. Available in two versions: GFA-50 with 50m of cable and GFA-100 with 100m of cable.

UNIVERSAL BASE
UNIVERSAL BASE

Universal base in stainless steel; it allows the use of standard geophones on asphalt and other rigid surfaces without unscrewing the rod.

CARRYING BAG
CARRYING BAG

Padded shoulder bag for a set of standard geophones or other seismic accessories

TECHNICAL SPECIFICATIONS
GEOPHONES

 

Specifiche tecniche geofoni
Specifiche tecniche soggette a variazioni senza preavviso
Specifiche tecniche geofoni
Specifiche tecniche soggette a variazioni senza preavviso