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Nanometrics - Trillium 120 BH
The Trillium Borehole Seismometer is a very broadband seismometer designed for cased boreholes. The instrument is housed in a stainless steel enclosure with an integrated hole-lock mechanism, strain relief, and a highpressure marine grade connector. An advanced leveling system allows the instrument to self-correct over a tilt range of +/- 5 degrees.

The Trillium Borehole is ideal for local, regional and tele-seismic studies having a response flat to velocity from 120 seconds to 150Hz and a self-noise below the NLNM at 100 seconds. Operators will appreciate the low power consumption, remote mass centering and robust no-mass lock design inherent in all Trillium seismometers.

Benefits
  • Automatic leveling can be remotely initiated for corrections of up to +/- 5 degrees, facilitating hole-lock installations in deep boreholes. 
    • The axis stack is mechanically levelled to ensure that the vertical axis does not couple horizontal noise. 
  • A robust, waterproof, stainless steel enclosure ensures the sensor is protected from hostile environments. 
  • Instrument recovery is aided by a fail-safe holelock release mechanism that prevents jamming to the casement during removal. 
  • Low power consumption of 560mw minimizes power source requirements at the site. 
  • Quiet down-hole deployments benefit from the exceptional self-noise below NLNM at 100 s.
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