Surface Broadband

Low noise broadband and very broadband seismometers suitable for surface, vault and field.

Advanced force balance feedback guarantees excellent stability and linearity across the passband.

Based on an electrochemical mechanism, our transducers have many advantages over traditional electromechanical sensors, such as a larger motion to voltage conversion ratio and the fact that they do not require a mass lock or mass centering.

Rugged, with low power consumption, our broadband seismometers operate over a wide temperature range.

National, Regional and Global Seismicity

Tellus Full Size Surface Broadband

Full Size Tellus is our highest performing broadband in terms of noise


 

Tellus Compact Surface Broadband

Tellus Compact is a few dB noisier than Full Scale, but still performs very well


 

Tellus Post-hole Broadband

Post-hole version of Tellus broadband, same performance of Compact


 

Available bandwidth:

Tellus 30s :  offers a response between 30 seconds and 50Hz. No need for mass centering or locking, easy to use and to install.​

Tellus 60s :  offers a response between 60 seconds and 50Hz. No need for mass centering or locking, easy to use and to install.​

Tellus 120s : offers a response between 120 seconds and 50Hz. No need for mass centering or locking, easy to use and to install.

Upperband limit can be optionally extended to 100Hz.

Operating PrincipleElectromechanical force-balancedElectromechanical force-balancedElectromechanical force-balanced
Output Signals2 Horizontal, 1 Vertical; Velocity Flat Response2 Horizontal, 1 Vertical; Velocity Flat Response2 Horizontal, 1 Vertical; Velocity Flat Response
Output Swing±20 V (40 V p-p)±20 V (40 V p-p)±20 V (40 V p-p)
Dynamic Range150dB150dB150dB
Passband30s-50Hz¹60s-50Hz¹120s-50Hz¹
Generator Constant2000 V/m/s ²2000 V/m/s ²2000 V/m/s ²
Maximum Installation Tilt±15°±15°±15°
Calibration CoilsEnable and input lines on sensor connector 1V in 1V outEnable and input lines on sensor connector 1V in 1V outEnable and input lines on sensor connector 1V in 1V out
Dimensions180x140x100180x140x100180x140x100
Weight3Kg3Kg3Kg
Mechanical Resonances>400Hz>400Hz>400Hz
Protection GradeIP68 submersible 1mIP68 submersible 1mIP68 submersible 1m
Temperature Range– 40 to +55C°– 40 to +55C°– 40 to +55C°
ComplianceCECECE
Cable3 meters standard or custom3 meters standard or custom3 meters standard or custom
Power3-30VDC 25mA or 10mA low power3-30VDC 25mA or 10mA low power3-30VDC 25mA or 10mA low power
ConnectorPT06E-14-19P(SR)PT06E-14-19P(SR)PT06E-14-19P(SR)

¹ Optional: 100Hz pass band extension
² Optional : 350 – 20.000 V/m/s

 

Tellus Compact PSD