Seismometer CME-4311

The compact broadband low-noise seismometer CME-4311 is well suited both for permanent and portable installations. 

This easy-to-install, very reliable instrument does not require any maintenance, mass locking and centering. The instrument offers the cost-effective solution for installations with the noise level close to a Low-Noise Model. 

1-component (vertical or horizontal) version of the CME-4311 model is available.

The CME-4311 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 ± 10V (5 mm/sec)
Self noise at 1 Hz 2.8 nm/sec (5.6 µV)
Dynamic range 122 dB
Nonlinearity 0.5 %
Sensitivity axes Vertical, North, East
Supply voltage 12/24 V Nominal (10.5-30 V permissible)
12 V Nominal (9-16 V permissible)
Power consumption 28 mA
8 mA (low power)
Temperature range -12°C - +55°C - standard range
-40°C - +55°C - extended range
Maximum installation tilt ±15°
Dimensions 180 x 140 mm (dimensions including handle, diameter x height)
Weight 4.6 kg
Case material Aluminum
Output impedance 1000 Ohm
Cold-start time 15-45 min.
Leveling, mass locking none required
Case connectors Russian PC-10TB type, 10 pin
Delivery set 1.5 meter cable, bubble level, handle, three feet