borehole seismometer CME-4311-BH150

CME-4311-BH150

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Description

The three-component broad-band low-noise seismometer CME-4311-BH150 is designed for permanent or long-term installation in boreholes down to 250 meters both dry and flooded.

The sensor is equipped with a hermetic connector and a lifting ring for going in the hole and subsequent surfacing. The device is very rugged and does not require any adjustment or mass-centering.

FIELDS OF APPLICATION

  • SEISMIC MONITORING NETWORKS
  • WEAK MOTION MEASUREMENTS
  • SEISMOLOGICAL RESEARCH
  • EARTHQUAKE DETECTION AND MEASUREMENT
  • MICRO ZONING
  • BOREHOLE SEISMIC NETWORKS

Spesification

Spesification

Frequency range 0.016 Hz (60 sec) – 50 Hz
Sensitivity 2000 V/(m/sec)
Clip level 5 mm/sec
Self noise at 1 Hz 2.8 nm/sec (5.6 µV)
Dynamic range 122 dB
Nonlinearity 0.5 %
Sensitivity axes Vertical, North, East
Supply voltage 12 V Nominal (10.5-16 V permissible)
Power consumption 25 mA
Temperature range -40…+55°C
Maximum installation tilt ±15°
Dimensions 105 x 505 mm (diameter x height including lifting ring)
Weight 7.5 kg
Case material Stainless steel, waterproof, depth down

to 250 m
Max. underwater depth 250 m
Output impedance 1000 Ohm
Cross-axes sensitivity -60 dB
Cold-start time 15 – 45 min
Leveling, mass locking none required
Case connectors Russian RS-10 type 10-pin connector with additional hermetic sealing
Delivery set Lifting ring, 3 feet, pin
Maximum output swing ±10 V, differential output

Features

  • Frequency Range: 0.016 Hz (60 Sec) – 50 Hz
  • Sensitivity: 2000 V / (m/sec)
  • Clip Level: 5 mm / Sec
  • Noise Level (1 Hz): 2.8 nm/Sec (5.6 uV)
  • Dynamic Range: 122 dB
  • High Performance
  • Works Up To 250 m Depth

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