ΘTHETA-TT120-VEL.

THETA-TT120-VEL

Product Overview

Theta-TT120-Vel is a mid-range portable feedback broadband seismometer 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.

Detailed sensor calibration information is provided with every sensor, including sensor dc calibration levels, frequency response of the instrument and the transfer function in poles/zeros notation.

View Instrument Specification

Alpha GaiaCode product thumbnail

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

It is extremely simple to install the sensor, three leveling feet ensure that the sensor can be leveled easily with the aid of the bubble level. The North/South ordination points are machined on the sensor base and the sensor component fixing crews are fixed with dowel pins to achieve highest possible orientation accuracy. The errors in pointer to the sensor orientation is less than ± 0.1 degrees.

 

THETA-TT120-VEL

Instrument Specifications

Suitability

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

Benefits

  • High data quality broadband data
  • Truly rectilinear suspension system with high cross axis rejection
  • Broadband data with high frequency response extending to 150 Hz
  • Minimises equipment used during installation
  • Automatic self-installation and zeroing for quick installation
  • Tilt tolerance of ±10 degrees
  • 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)

GaiaCode
GaiaCode

Read our

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]