ΘTHETA-TTD120-VEL.

THETA-TTD120-VEL

Product Overview

The Theta-TTD120-Vel is a unified digital output broadband seismometer, the broadband feedback sensor and its precision 24-bit 8-channel digitiser are housed inside a waterproof enclosure.

The low noise high dynamic range broadband feedback seismometer is based on a truly rectilinear suspension system which does not require mass lock. The 8-channel 24-nit digitiser exploits the high dynamic range of the sensor forming a perfect portable sensor system.

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The THETA family sensors are broadband seismometers incredibly simple to deploy in large arrays and are suitable for local, regional and teleseismic recording.

THETA-TTD120-VEL

Instrument Specifications

Suitability

The Theta-Tau digital sensor can be used effectively in permanent or short term seismic experiments such as:

  • Single or large scale seismic networks
  • Micro-seismic monitoring
  • After-shock monitoring
  • Volcanology
  • Hydrocarbon exploration
  • Permanent reservoir monitoring
  • Induced seismicity detection
  • Explosion monitoring
  • Post-hole seismology
  • Micro-seismic monitoring

Benefits

  • High quality broadband data
  • Truly rectilinear suspension system with high cross axis rejection
  • Broadband data with high frequency response extending to 150 Hz
  • Minimal equipment used during installation
  • Reduces equipment to transport
  • Automatic self-installation and zeroing for quick installation.
  • Tilt tolerance of ±10 degrees
  • Display of operational parameters
  • System gain can be remotely adjusted with programmable gain amplifiers
  • Portable and easy to deploy
  • Waterproof with connectors mated
  • Connector turret provides easy access to the connectors and cabling

Disclaimer: The product specifications and the stated data are subject to change without prior notice.

REFERENCES

Ref 1: GURALP C.M. Patent Application, No: 7909579 Filed: 19th March 1979 (declaration priority from Appln No: 10279/78 Filed: 15th March 1978) “Vertical Seismometer”.
Ref 2: GURALP, C.M., “The Design of a Three-component Borehole Seismometer”, 1980. Ph.D. Thesis, Univ of Reading
Ref 3: USHER, M.J., BURCH, R.F. and GURALP, C.M., “Wide-band Feedback Seismometers”, 1979. Physics of the Earth and Planetary Interiors, 18: 38-50.
Ref 4; M,J, USHER and C.M. Guralp, “The design of miniature wideband seismometer” Geophys. J.R. ast. Soc. (1978)-55 (605-613)

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References

  • Ref 1 USHER, M.J., BURCH, R.F. and GURALP, C.M., “Wide-band Feedback Seismometers”, 1979. Physics of the Earth and Planetary Interiors, 18: 38-50.
  • Ref 2 M,J, USHER and C.M. Guralp, “The design of miniature wideband seismometer” Geophys. J.R. ast. Soc. (1978)-55 (605-613) ,
  • Ref 3 GURALP, C.M., “The Design of a Three-component Borehole Seismometer”, 1980. Ph.D. Thesis, Univ of Reading.
  • Ref 4 GURALP C.M. Patent Application, No: 7909579 Filed: 19th March 1979 (declaration priority from Appln No: 10279/78 Filed: 15th March 1978) “Vertical Seismometer”.
  • Ref 5 GURALP C.M. United States Patent Application Number: 4,280.206 March 1979. SEISMOMETERS.
  • Ref 6 GURALP C.M. UK Patent Application GB 2-144-287-A. July 1983 Analog-to-digital converters for Seismometers. The National Research Development Corporation (UK)
  • Ref 7 GURALP C.M. UK Patent Application No. 1900719.4; Title: Infrasound Detector [M&S-IRN.FID4315516]