Seismometer CME-4311-OBS

The CME-4211-OBS and CME-4311-OBS seismometers are specially adapted for ocean bottom applications and are versions of the CME-4211 and CME-4311 models correspondingly.

These models share main technical parameters with corresponding regular versions but have a specially designed compact lightweight case, a flat flexible signal cable and consume less power. Specially designed hardware allows the seismometers to be installed inside titanium or glass waterproof spheres usually used in ocean bottom installations.

Characteristics Delivery and warranty

Sensitivity axes Vertical, North, East
Sensitivity 2000 V / (m/sec)
Clip level 5 mm/sec
Frequency range 0.016 (60 sec) - 50 Hz
or by customer specification
Maximum output swing ±10 V, differential output
Temperature range -12°C - +55°C - standard range
-40°C - +55°C - extended range
Supply voltage 6-15 V DC, battery power
9.5-16 V DC, single-ended. Nominal value – 12 V
Power consumption 7,5mA – low-power version
Cold-start time 20 - 120 min
Maximum installation tilt ±15°
Noise performance -155 dB (relative to 1 m/sec2√Hz)
Weight 3.1 kg
Dimensions 162 x 115 mm (diameter x height)
Case Stainless steel, aluminum