CMG-3T5TB

The CMG-3T5TB combines weak- and strong-motion instruments in a single borehole casing.

Features

Complete CMG-3T and 5T instruments in modular sonde
Downhole CMG-DM24 digitizer ensures highest data fidelity
RS232, RS422 or optical links to the surface
Can be installed at over 500 m depth
Individual levelling bowls allow installation in boreholes with up to 12 ° tilt
Weak-motion response from 1 – 360 s to 50 – 200 Hz (120 s – 50 Hz standard)
Over 200 dB dynamic range

The 3T/5TB was featured in a poster presentation given at EGU 2006.

Download the poster (15 Mb)

Options

Single- or three-jaw hole lock unit for installing in boreholes between 89 and 229 mm diameter
Built-in inclinometer with separate control unit
Cable strain relief mechanism (standard if a downhole digitizer is not used)

Dynamic range

Dynamic range of the 3T5TB.

The low noise floor of the CMG-3T components, combined with the 4 g clip level of the CMG-5T sensors, provide an instrument with an effective dynamic range greater than 200 dB over the entire short-period passband.

Weak motion performance

The CMG-3T/5TB uses the same design as the popular CMG-3T instrument.

The plots below estimate the system noise power of the vertical component of the 3T conventional-response sensor. The system noise power, corrected for system response and gain, is shown as a continuous thin line; the circled line is the raw non-coherent power spectrum. The thicker line is the Peterson New Low Noise Model (NLNM).

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

CMG-3T5TB

Features

Options

Dynamic range

Weak motion performance

Borehole news

Case study: Borehole array in Japan

Very Deep Borehole Installations

New borehole instruments for the South Pole



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-3T5TB CMG-3T5TB The CMG-3T5TB combines weak- and strong-motion instruments in a single borehole casing. Datasheet Manual Features Complete CMG-3T and 5T instruments in modular sonde Downhole CMG-DM24 digitizer ensures highest data fidelity RS232, RS422 or optical links to the surface Can be installed at over 500 m depth Individual levelling bowls allow installation in boreholes with up to 12 ° tilt Weak-motion response from 1 – 360 s to 50 – 200 Hz (120 s – 50 Hz standard) Over 200 dB dynamic range The 3T/5TB was featured in a poster presentation given at EGU 2006. Download the poster (15 Mb) Options Single- or three-jaw hole lock unit for installing in boreholes between 89 and 229 mm diameter Built-in inclinometer with separate control unit Cable strain relief mechanism (standard if a downhole digitizer is not used) Dynamic range Dynamic range of the 3T5TB. The low noise floor of the CMG-3T components, combined with the 4 g clip level of the CMG-5T sensors, provide an instrument with an effective dynamic range greater than 200 dB over the entire short-period passband. Weak motion performance The CMG-3T/5TB uses the same design as the popular CMG-3T instrument. The plots below estimate the system noise power of the vertical component of the 3T conventional-response sensor. The system noise power, corrected for system response and gain, is shown as a continuous thin line; the circled line is the raw non-coherent power spectrum. The thicker line is the Peterson New Low Noise Model (NLNM). Measured self-noise of the CMG-3T, vertical component. Borehole news Case study: Borehole array in Japan November 2004 A network of 14 instruments installed as an upgrade to a pre-existing array. Very Deep Borehole Installations April 2008 Güralp Systems Ltd. recently delivered and installed two seismic sensors in deep boreholes in California and Japan. 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. More articles on this topic...