Trillium 120 P/PA Broadband Seismometer

A compact portable sensor offering superior broadband performance over a wide temperature range with very low self noise. This low self-noise makes the Trillium 120P/PA ideal for local, regional and tele-seismic studies in both observatory and portable applications. Portable network users will appreciate the low power consumption and reliable operation over a temperature range of ±45ºC without re-centering.

The Trillium PA offers the added benefit of fast "one touch" motorized mass centering. Motorized mass centering simplifies seismometer installation and provides the option of remotely re-centering the masses via a telemetry connection.

Seismology Trillium 120 Broadband Seismometer

  • Very broadband performance from a portable, low -power seismometer

  • Wide ranging temperature operations (+/-45°C) without re-centering

  • Switchable XYZ/UVW output to provide independent calibration of sensor axes

  • Simple operation with no mass lock to employ

  • Trillium PA offers the added benefit of motorized mass centering for rapid deployment and remote adjustment

TECHNOLOGY

  
Topology Symmetric triaxial
Feedback Force balance with capacitive transducer
Mass Centering Automatic motorized re-centering, can be remotely initiated
Leveling Integrated bubble level; Adjustable locking leveling feet
Alignment
Vertical scribe marks for (N and S); Precision guide in cover for straight-edge, line or laser level; Holes for 5/16" alignment (E and W) 

PERFORMANCE

  
Self-noise Below the NLNM 35 s up to 10 Hz
Sensitivity 1200 V-s/m ±0.5% precision, Contact factory for other options
Bandwidth -3 dB points at 120s and 145 Hz
Clip Level > 15 mm/s up to 1.5 Hz

Temperature

±45°C without re-centering 

INTERFACE

  
Connector 19-pin MIL-C-28642
Velocity Output 40 V peak-to-peak differential; Selectable XYZ or UVW mode
Mass Position Output Three independent voltage outputs
Calibration Input Single voltage input with one active high control signal per channel; Calibration in XYZ or UVW
Serial Port
For enhanced instrument control and status: 
Mass center, UVW/XYZ mode, short/long period mode, firmware updates Temperature, mass position, instrument status, serial number

POWER

  
Supply Voltage 9 to 36 volts DC isolated input
Power Consumption 620 mW typical at 15 V input
Protection
Reverse-voltage protection; Auto-resettable over-current protection 
(No fuse to replace)

PHYSICAL

  
Diameter 21.0 cm
Height 21.4 cm ±0.5 cm depending on leveling feet extension
Weight 7.5 Kg
Handling Detachable carrying handle on lid

ENVIRONMENTAL

  
Operating temp -20°C to +50°C
Humidity 0 to 100%
Shock 20g half sine, 5 ms without damage, 6 axis;
No mass lock required for transport
Rugged Rated to IP68 and NEMA6P for outdoor use

Seismology noise