The EP-105OBS Series Ocean Bottom Seismometer instruments are designed as, versatile, rugged broadband active seismic sensors. They consume very low power and are packaged in compact, lightweight PVC cases. Unlike traditional seismometers, they are based on proprietary electrochemical transducer technology .

These transducers have many advantages over conventional electromechanical sensors. All senor components are equipped with a force-balancing feedback. The sensors are offered in two application-dependent versions: EP105OBS-SM with a higher clip level, and EP105OBS-LN with reduced noise. Both models have the same dynamic range, which is shifted up by approximately 10db in the 'SM' relatively to the 'LN' version.

The EP105OBS has an exceptionally rugged design and DOES NOT require mass lock or mass centering, or special installation equipment or procedures. The units are operational in a wide range of installation tilts. They are suitable for both Bentho's and Titanium cylinder installation. Optional inclinometers may be installed.

These seismometers provide a low cost of ownership, REQUIRING no maintenance over the life of the instrument. Three and five-year extended warranties are available.

• Passband 0.033 Hz to 50 Hz, Optional 0.0167 Hz
• Low Power
• No Mass Centering or Mass Locks
• High Sensitivity
• 135dB Dynamic Range
• Rugged
• Maintenance Free
• Operates over a wide tilt
• Flat Frequency Response