The Trillium 120 PA made by Nanometrics.

Pool Contents
Seismometer                                 16 Units:Trillium 120 PA

Mechanical Parameters
Sensor                                                3 symmetric triaxial sensors

Signal Output
Generator Constant                     1200 Vs/m
Response                                          Ground velocity from 120 sec to 145 Hz, but +7dB @ 30 Hz
Max. Output                                    ±20 V

Physical Parameters
Power Consumption                   0.62 W @ 15 V
Weight                                               7.5 kg
Operating Temperatures         -20 to +50 °C

Poles and Zeros