Short-period seismometer CME-3311

The three-component low-noise short-period seismometer CME-3311 is featured with a low self-noise, high gain, low power consumption. Its dynamic range is 118 dB at 1 Hz, maximum installation tilt is ±15°.

It is reliable and has no moving parts to be broken or wear out. 

Like other molecular-electronic seismometers, this model does not require mass centering for installation and mass locking for transportation. The seismometer is well-suited for portable and permanent installations in locations with the background noise close to the Low Noise Model. 

It can be used in seismology, seismic exploration, engineering geophysics and vibrational monitoring. 

The 1-component (vertical, horizontal) version is available.

The CME-3311 frequency characteristic with the poles and zeros presentation is available at the link of Incorporated Research Institutions for Seismology (IRIS).

Characteristics Delivery and warranty

Frequency range 1 Гц - 50 Гц
Sensitivity 2000 V/(m/sec)
Clip level 5 mm/sec
Integral noise in passband 5 nm/sec (10 µV)
Dynamic range 118 dB at 1 Hz
Nonlinearity 1% at 10 Hz
Sensitivity axes 3 orthogonal
Supply voltage 12 V Nominal (10.5 - 16 V permissible)
Power consumption 25 mA for 3-component version; 12 mA for 1-component version
Temperature range -40...+55°C
Maximum installation tilt ±15°
Output impedance 1000 Ohm
Cross-axes sensitivity -60 dB for 3-component version
Cold-start time 10 - 30 min
Leveling, mass locking none required
Case connectors 10-pin RS-10 Russian type connector (for 1-component version)
Delivery set 1.5 m open-ended cable (for 3-component version), 3 feet
Maximum output swing ±10 Ohm
Case material Aluminum, waterproof
Dimensions 150 х 150 х 110 mm (3-component) / 120 х 120 х 110 mm (1-component)
Weight 3 kg (3-component) / 1.6 kg (1-component)