Nanometrics Broadband Seismic Sensor Workshop 24 March 2004 Neil Spriggs

Nanometrics Trillium 40 broadband seismometer  First seismometer development at Nanometrics  Designed for local and regional studies  Balance between spec/time to market, revenue for seismometer unit Specifications  40 seconds to 50 Hz  Power consumption <0.5 watts  Simple design with no mass lock  Wide operating temperature range with electronic mass centering Trillium 40

Nanometrics Very simple to manufacture  Symmetric triaxial design, identical axis  Single circuit board, surface mount  Automatic test software, axis and boards are manufactured independently and are interchangeable Trillium 40

Nanometrics

Trillium 40 Coherence data, STS-2 vs. Trillium 40 Data from University of St Louis BlueCMG-40T self noise YellowTrillium 40 self noise RedCMG-3T self noise GreenSTS-2 self noise Data from IRIS comparison tests

Nanometrics Trillium 120 broadband seismometer  Response, 120 seconds to 50 Hz  Mechanical mass centering using stepper motor  Low power consumption, < 1watt  No mass lock, same mass support system as Trillium 40  Onboard web server with serial interface  Factory calibration data in XML  Center masses using a laptop and browser  Review temperature and power SOH using a browser  Symmetric triaxial design for ease of manufacture New Developments

Nanometrics Trillium 120 seismometer and Taurus hand held data Acquisition system

Nanometrics Thank you. Nanometrics Inc