Low-noise force-balance broadband seismometer CME-6211
Keeping up with parameters of CME-6111, the three-component low-noise force-balance broadband seismometer CME-6211 has a significantly lower sensitivity toward the atmospheric pressure and temperature variations in a lower frequency range.
This model's sensors are equipped with a double-shielded isolation from unwanted external actions.
The CME-6211 seismometer does not require mass centering or any other special techniques during installations. This model is designed for using mostly as a part of permanent seismic stations and is the most ultimate one among our seismometers.
The CME-6211 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 | 0.008 Hz (120 sec) - 50 Hz |
| Sensitivity | 2000 V/(m/sec) |
| Clip level | ±15 V (7.5 mm/sec) |
| Self noise at 1 Hz | below NLNM in 0.1-5 Hz frequency range |
| Dynamic range | 140 dB |
| Nonlinearity | 0.2 % |
| Sensitivity axes | Vertical, North, East |
| Supply voltage | 12 V Nominal (10.5 - 16 V permissible) |
| Power consumption | not over 35 mA at 12 V in the main mode |
| Temperature range | -40...+55°C |
| Maximum installation tilt | ±15° |
| Output impedance | 1000 Ohm |
| Cold-start time | 15 - 45 min |
| Leveling, mass locking | none required |
| Case connectors | Amphenol MS3102E (10/14 pins) |
| Delivery set | 1.5 meter cable, bubble level, handle, three leveling feet, protective cap for connector |
| Case material | Double-shielded isolation, aluminum |
| Dimensions | 254 x 260 mm (dimensions including handle, diameter x height) |
| Weight | 12.2 kg |