Very Broadband Seismometer
KS-54000/KS-1 - Geotech Instruments, llc (Geotech)
Geotech's Model KS-54000 is a borehole, Model KS-1 a vault, three-component seismometer, designed for ultra low-noise monitoring for frequencies from 0.003 to 5 Hz, being below the Low Noise Model for frequencies up to 5 Hz.