CMG-3ESP

The CMG-3ESP is a cost-effective weak-motion broadband sensor, suitable for surface vault (observatory), subsurface vault and posthole installations.

Features

Covers the complete seismic spectrum with a single transfer function
120 s &ndash 50 Hz standard response
Self-noise below NLNM between 40 s and 16 Hz
Truly portable with lifting handle and convenient access to connectors
High linearity: >107 dB horizontal, 111 dB vertical (USGS figures)
Over 140 dB dynamic range over the entire passband (USGS figure)
Cross-axis rejection over 62 dB
Sensor axes orthogonal to within 0.1 °
Manual mass locking and unlocking; electronic centring
Adjustable feet allow for up to 2.5 ° tilt
Low power consumption (600 mW from 12 V input power)

Options

Remote electronic mass locking, unlocking and centring (also consider the CMG-3ESP Compact)
Response options from 30 – 120 s to 100 – 200 Hz
Hybrid response
CMG-3ESPD digital output instrument
CMG-3ESPV vertical single component instrument
CMG-3ESPB borehole form factor

Noise performance

The noise level of the sensor transducer is at least 20 dB less than the Brownian noise of the instrument (set to −195 dB rel. 1 m²/s⁴/Hz acceleration).

The plot below estimates the system noise power of the vertical component of the 3ESP conventional-response sensor. The red line is the Peterson New Low Noise Model (NLNM).

Measured self-noise of the CMG-3ESP, vertical component.

CMG-3 news

Complete CMG-3T vault installation

Best practices for installing a weak-motion sensor in a vault, and how to connect the instrument to a CMG-DM24 digitizer and (optionally) a CMG-DCM.

New borehole instruments for the South Pole

December 2006

A new-generation CMG-3TB instrument with adaptations for cold conditions is headed for the South Pole as part of a major upgrade to the world's quietest seismic station.

A stable foundation for cutting-edge physics

August 2006

An active vibration isolating platform based on an instrument from Güralp Systems is helping to provide new insights into atomic physics.



Home Products CMG-3T CMG-3TD CMG-3ESP Compact CMG-3ESPD Compact CMG-5T CMG-5TD CMG-5T Compact CMG-40T CMG-6TD CMG-CD24 CMG-DM16 CMG-DM24 CMG-DCM CMG EDU All products Software New installations Customer support About us	CMG-3ESP CMG-3ESP The CMG-3ESP is a cost-effective weak-motion broadband sensor, suitable for surface vault (observatory), subsurface vault and posthole installations. Datasheet Manual (PDF) Manual (HTML) Quick start sheet Features Covers the complete seismic spectrum with a single transfer function 120 s &ndash 50 Hz standard response Self-noise below NLNM between 40 s and 16 Hz Truly portable with lifting handle and convenient access to connectors High linearity: >107 dB horizontal, 111 dB vertical (USGS figures) Over 140 dB dynamic range over the entire passband (USGS figure) Cross-axis rejection over 62 dB Sensor axes orthogonal to within 0.1 ° Manual mass locking and unlocking; electronic centring Adjustable feet allow for up to 2.5 ° tilt Low power consumption (600 mW from 12 V input power) Options Remote electronic mass locking, unlocking and centring (also consider the CMG-3ESP Compact) Response options from 30 – 120 s to 100 – 200 Hz Hybrid response CMG-3ESPD digital output instrument CMG-3ESPV vertical single component instrument CMG-3ESPB borehole form factor Noise performance The noise level of the sensor transducer is at least 20 dB less than the Brownian noise of the instrument (set to −195 dB rel. 1 m²/s⁴/Hz acceleration). The plot below estimates the system noise power of the vertical component of the 3ESP conventional-response sensor. The red line is the Peterson New Low Noise Model (NLNM). Measured self-noise of the CMG-3ESP, vertical component. CMG-3 news Complete CMG-3T vault installation Best practices for installing a weak-motion sensor in a vault, and how to connect the instrument to a CMG-DM24 digitizer and (optionally) a CMG-DCM. New borehole instruments for the South Pole December 2006 A new-generation CMG-3TB instrument with adaptations for cold conditions is headed for the South Pole as part of a major upgrade to the world's quietest seismic station. A stable foundation for cutting-edge physics August 2006 An active vibration isolating platform based on an instrument from Güralp Systems is helping to provide new insights into atomic physics. More articles on this topic...