3D LAND GEOPHONE WITH USB INTERFACE MOD. GEMINI-2 & GEMINI-40 pages

GEOPHYSICS

3D LAND GEOPHONE WITH USB INTERFACE
MOD. GEMINI-2 & GEMINI-4

www.pasigeophysics.com

Gemini-2 & Gemini-4 represent PASI
answer to the increasing request for
HVSR acquisition: a single waterproof
case with integrated a low frequency, high
performing 3D-geophone assembly (two
versions available, with real 2Hz or 4.5 Hz
sensors properly coupled) and a powerful true 24 bit data acquisition board.
Through Gemini USB interface and the
related data acquisition software your PC
will be transformed in a perfect, very high
performing instrument for both data recording and post-processing analysis.

Data acquisition board speifications
Power supply: through USB port
Sampling rate: from 20Hz to 8000 Hz
A/D Sigma-Delta converter resolution: 24 real Bit
Record time: up to 120min (std.ver.)
Acquisition channels: No. 3
S/N ratio at fs=1KHz: 117 dB
S/N ratio at fs=8KHz: 109 dB
Passband at fs=1KHz: 110 Hz, proportional to
sampling rate

Gemini-2 Sensors Specifications

Nat. Frequency: 2 Hz +/-10%
Sensibility: 2 V/cm•S-1 +/- 5%
Internal Resistance: 5.8kΩ +/-5%
Damping: 0.7 +/-10%
Harmonic Distortion: ≤ 0.2%
Insulating Resistance:≥ 10 MΩ
Working Temp.: from -25°C to + 55°C
Sensor clamping: automatic when not in use
Physical Dim.: diam.128mm, h.80mm (spike excl.)
Weight: 2.15 kg

Gemini-4 Sensors Specifications

Gemini-2 & Gemini-4

Nat. Frequency: 4.5 Hz +/-10%
Sensibility: 0.28 V/cm•S-1 +/- 5%
Internal Resistance: 345 Ω +/-5%
Damping: 0.7 +/-10%
Harmonic Distortion: ≤ 0.2%
Insulating Resistance:≥ 10 MΩ
Working Temp.: from -25°C to + 55°C
Sensor clamping: automatic when not in use
Physical Dim.: diam.115 mm, h.80 mm (spike excl.)
Weight: 1.75 kg

Acquisition software
Gemini-2 connected via USB to a laptop PC
P.A.S.I. S.R.L. — Via Galliari 5/E — 10125 Torino
tel. +39 011 6507033 — fax +39 011 658646
e-mail: sales@pasisrl.it

www.pasigeophysics.com