Seismometer CME-4311-BH150

This is a 3-component broadband low-noise borehole seismometer.

It is used for permanent or long-term installation in dry or flooded boreholes at depths of up to 250 meters.

The seismometer has a hermetic connector and a lifting ring for borehole installations and subsequent surfacing. 

The instrument is rugged and does not require any adjustment or mass-centering.

Characteristics Delivery and warranty

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 -12°C - +55°C - standard range
-40°C - +55°C - extended range
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