Seismometer CME-4211-BH150

The CME4211-BH150 model, a 3-component broadband low-noise seismometer, is designed for permanent or long term installation in boreholes down to 250 meters depth both dry and flooded. The sensor is equipped with a hermetic connector and a lifting ring for going in hole and subsequent surfacing. The instrument is very rugged and does not require any adjustment or mass-centering.

Characteristics Delivery and warranty

Frequency range 0.033 Hz (30 sec) - 50 Hz
Sensitivity 2000 V / (m/sec)
Self noise at 1 Hz 8.9 nm/sec (17.8 µV)
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 303 mm (diameter x height including lifting ring)
Weight 4.3 kg
Case material Stainless steel, waterproof, depth down to 15 m
Max. underwater depth 250 м
Cold-start time 10 - 30 min
Maximum output swing ±10 V, differential output