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