Our most popular line of seismometers
The Trillium Compact seismometer is available in several variants to facilitate vault, surface or buried downhole deployments.
Quality data within minutes
The exceptionally small size of all Trillium Compacts, and the fact that no mass lock and no mass centering is needed, significantly reduces the time and effort required for site preparation and installation. Plus, no further intervention is required for continuous quality data within minutes of deployment.
Trillium Compact 20
The Trillium Compact 20s has a wide operational tilt range of ±10° and is suitable for downhole installations where the seismometer cannot be levelled, or for rapid deployments where a quick settling time is needed. The 20s is available in surface and posthole variations.
Trillium Compact 120
The Trillium Compact 120s has lower long-period noise and a narrower tilt range of ±2.5°. They are suitable for installations where the seismometer can be manually levelled or placed on a level surface, such as in a vault or at the bottom of a suitably prepared borehole. The 120s is available in surface and posthole variations.
The Compact family now includes the Trillium Cascadia. This dual-purpose sensor combines the technology of the 120s Compact with a Titan, for measuring both strong and weak motion.
Meridian Compact Posthole
Our Meridian Compact Posthole digital seismometer combines a Trillium Compact 120s or 20s seismometer and a 24-bit Centaur digitizer, mounted on a levelling system inside a waterproof, stainless steel pressure vessel.
Trillium Compact is also available in specialty form factors for ocean-bottom deployments or deployments in unstable terrain in which tilt is expected to exceed 10°, such as on ice sheets or glaciers.