CMG-3ESP Compact

The CMG-3ESP Compact is Güralp Systems' smallest ever triaxial weak-motion seismometer, offering CMG-3 performance for the price and size of a medium-motion instrument. It is suitable for surface vault (observatory), subsurface vault and temporary installations.

Features

Covers the complete seismic spectrum with a single transfer function
60 s – 50 Hz standard response (with 1s, 30s and 120s options)
Self-noise below NLNM between 30 s and 16 Hz
Truly portable: under 9 kg, with lifting handle and convenient access to connectors
Highly compact form factor, only 168 × 258 mm
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 °
Robust automatic mass locking, unlocking and centring
Adjustable feet allow for up to 4 ° tilt
Low power consumption (750 mW from 10 – 30 V input power)

Options

Long period response options: 1s, 30s, 60s (default), 120s.
Short period response options: 50Hz (default), 100Hz, 200Hz.
Feet allowing 8 ° of sensor tilt.
Hybrid response.
For manual mass locking and unlocking, consider the CMG-3ESP.

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-3ESP Compact

Features

Options

Noise performance

CMG-3 news

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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 Compact CMG-3ESP Compact The CMG-3ESP Compact is Güralp Systems' smallest ever triaxial weak-motion seismometer, offering CMG-3 performance for the price and size of a medium-motion instrument. It is suitable for surface vault (observatory), subsurface vault and temporary installations. Datasheet Manual (PDF) Manual (HTML) Quick start sheet Features Covers the complete seismic spectrum with a single transfer function 60 s – 50 Hz standard response (with 1s, 30s and 120s options) Self-noise below NLNM between 30 s and 16 Hz Truly portable: under 9 kg, with lifting handle and convenient access to connectors Highly compact form factor, only 168 × 258 mm 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 ° Robust automatic mass locking, unlocking and centring Adjustable feet allow for up to 4 ° tilt Low power consumption (750 mW from 10 – 30 V input power) Options Long period response options: 1s, 30s, 60s (default), 120s. Short period response options: 50Hz (default), 100Hz, 200Hz. Feet allowing 8 ° of sensor tilt. Hybrid response. For manual mass locking and unlocking, consider the CMG-3ESP. 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...