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Gemini 2 Hz

Product catalog summary

Overview: The Gemini-2 is a compact 3D land geophone designed for various geophysical applications including HVSR, MASW, and vibration analysis. It features a waterproof case with integrated low-frequency, high-performance 3D-geophone assembly and a 24-bit data acquisition board with USB connectivity for external PCs.

Applications:

HVSR (Horizontal to Vertical Spectral Ratio)
Surface Waves Analysis (active and passive methods, including Rayleigh & Love waves)
Active Seismics (with external trigger option)
Vibration Analysis & Monitoring
HOLISURFACE® data processing with third-party software

Features:

USB interface for data recording and post-processing
GPS option for georeferencing, timing, and synchronization
External trigger option
Software available in multiple languages: English, French, Spanish, Italian
2-year warranty

Technical Specifications:

Data Acquisition Board: Power supply and data recording via USB, 24-bit Sigma-Delta A/D converter, max sampling frequency of 8ksps on 3+1 channels, S/N ratio of 117 dB, bandwidth of +/- 0.1 dB at 108 Hz @ 1ksps, data output in SAF or SEG2 format.
Sensors: Natural resonance frequency of 2 Hz ± 10%, sensitivity of 2 V/cm•S-1 ± 5%, internal resistance of 5.8 kΩ ± 5%, damping of 0.7 ± 10%, harmonic distortion ≤ 0.2%, insulating resistance ≥ 10 MΩ, operational temperature range from –25°C to +55°C, automatic sensor clamping when not in use.
Physical Dimensions: Diameter of 128 mm, height of 175 mm (excluding spike), weight of 2.4 kg.

Accessories: Includes starter geophone and trigger lead-in cable graduated in cm.

Catalog excerpts

3D LAND GEOPHONE WITH USB INTERFACE MOD. GEMINI-2 2Hz sensors Compact-size New GPS option ...NOT ONLY HVSR Gemini-2 is a compact device for HVSR, MASW and Vibration Analysis: a single waterproof case with an integrated low frequency, high performing 3D-geophone assembly (with real 2Hz sensors properly coupled) and a powerful true 24 bit data acquisition board with USB port for external PC. APPLICATIONS: • HVSR • SURFACE WAVES (active and passive methods, Rayleigh & Love waves analysis with external trigger option) • ACTIVE SEISMICS (with external trigger option) • VIBRATION ANALYSIS & MONITORING • HOLISURFACE® (data processing with third-party software) The GPS option also guarantees georeferencing and timing of the Gemini; additional Gemini units can be further synchronized. Through Gemini USB interface and the related data acquisition software your PC becomes a perfect, high performance instrument for both data recording and postprocessing analysis. Software available in: English - French - Spanish - Italian P.A.S.I. S.R.L. — Via Galliari 5/E — 10125 Torino - Italy tel. +39 (0)11 6507033 - [email protected] - www.pasige

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TECHNICAL SPECIFICATIONS GEMINI-2 DATA ACQUISITION BOARD Data Output Format SAF (Sesame ASCII Format) / SEG2 (.dat) Nat. Resonance Frequency Sensibility Internal Resistance Damping Harmonic Distortion Insulating Resistance Working Temperature < 0.2% > 10 MQ from -25°C to +55°C Sensor Clamping Dimensions automatic when not in use Diam. 128 mm h. 175mm (spike excl.) P.A.S.I. S.R.L. — Via Galliari 5/E — 10125 Torino - Italy tel. +39 (0)11 6507033 - [email protected] - www.pasigeophysics.com Specifications subject to change without notice

Open the catalog to page 2

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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