Don’t let your seismometer limit you. The Trillium Compact Posthole is a small, ruggedized, waterproof member of the industry-leading family of Trillium seismometers.Trillium Compact PH image

The Trillium Compact PH is rugged enough to be buried directly in an ice shelf, light enough for easy portability on a volcano, and intuitive enough to be deployed in minutes.

Forget complex deployments

At just 3.3 kgs (or just over 7 lbs) and with the installation convenience comparable to a geophone, the Trillium Compact PH is the obvious choice for those who don’t want their experiments to be limited – by a complex deployment of bulky instrumentation, by the overburden, by the effects of moisture, by thermal instability, by high power consumption or by installation technique.

No vault required

Its corrosion, scratch and chip-resistant stainless steel enclosure, waterproof connector and rating to IP68 for full submersion in water makes the Trillium Compact PH ideal for direct burial, even in arid, polar or wet environments.

Ultra-low power consumption

Both variants of the Trillium Compact PH – the 120s and 20s – boast ultra-low power consumption, at <180 mW and <195 mW respectively. And its optional transport case doubles as a thermal insulating cover for surface deployments.

A highly integrated station solution

When using the Trillium Compact PH with our popular Centaur digitizer, you’ll have access to a digital leveling bubble through the Centaur GUI. The virtual leveling bubble makes for easy leveling down a dark hole, or once buried, gives you the ability to check levelness at any time.


Also available:


Polar certified logo


Polar Certified Model available for
operating temperatures down to -50°C




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