Low-noise force-balance broadband seismometer CME-6111

The three-component low-noise force-balance broadband seismometers CME-6111 combine the low-noise molecular-electronic sensing element (transducer) and the electrodynamic feedback. That all results in a very flat response over a wide frequency range, high dynamic range and greatly improved time and temperature stability of the instrument parameters.

Like other molecular-electronic instruments, the CME-6111 model is very rugged and does not require any special means or procedures for transportation and installation. The only procedure to start its operation is to place the seismometer on a rigid horizontal surface, turn it on and wait for several minutes. 

The seismometer can be used in various areas including permanent stations and field research.

The CME-6111 frequency characteristic with the poles and zeros presentation is available at the link on the website of Incorporated Research Institutions for Seismology (IRIS).

Characteristics Delivery and warranty

Frequency range 0.016 Hz (60 sec) - 50 Hz
Sensitivity 2000 V/(m/sec)
Clip level ±20 V (10 mm/sec) or ±15 V (7.5 mm/sec)
Self noise at 1 Hz 1.4 nm/sec
Dynamic range 134 dB
Nonlinearity 0.2 %
Sensitivity axes Vertical, North, East
Supply voltage 12 V Nominal (10.5 - 16 V permissible)
Power consumption 700 mW
30 mA (Low power)
Temperature range -40...+55°C
Maximum installation tilt ±15°
Output impedance 1000 Ohm
Cold-start time 10 - 30 min
Leveling, mass locking none required
Case connectors Amphenol MS3102E (14 pins)
Delivery set 1.5 meter cable, bubble level, handle, three leveling feet, protective cap for connector
Case material Stainless steel, aluminum
Dimensions 204 x 210 mm (dimensions including handle, diameter x height)
Weight 7.5 kg