The EP-105-U is an uniaxial that is designed as a versatile, very
compact, lightweight, and very rugged broadband seismic sensor.
Unlike traditional seismometers, they are based on proprietary electrochemical
transducer technology that provides many advantages over the conventional
electromechanical (mass) seismometers. In particular unlike other
sensors, the EP-105-U noise curve is essential flat starting from
about 5Hz toward the longest periods. Each sensor element in EP-105-U
is equipped with an efficient electrodynamic force-balancing feedback.
The instrument is offered in two application-dependent versions.
The standard EP105-(LN) is the reduced noise version. An optional
model, EP105-SM has a higher clip level and is used for strong motion
applications. Both versions have the same dynamic range, which is
shifted up by approximately 10db in the ‘SM’ relatively
to the standard ‘LN’ version.
The EP105-U has an exceptionally rugged design and easily deployed
in the field. It DOES NOT require mass lock for transportation,
mass centering, special installation equipment, or technical installation
procedures. The units are operational over a wide range of installation
tilts. An optional inclinometer may be installed. The EP105-U seismometer
provides low cost of ownership, REQUIRING no maintenance over the
life of the instrument. Three and five-year extended warranties
are available.