Rotational Seismometers

blueSeis

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Nathalie Olivier

Business Development Manager

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blueSeis product line offers unique and reliable solutions that are pushing back the boundaries and opening up a broad field of possibilities in Geosciences and Earth Monitoring. Based on the FOG technology, the blueSeis product line, now gives the possibility to explore rotational ground motions, thanks to rotational seismometers (1 to 3 axes) and provide high precision True North alignment, thanks to Seistans heading and attitude reference system with GNSS denied capabilities.

blueSeis-3A: a portable, absolute & broadband rotational 3-component seismometer

​Based on Fiber-Optic-Technology blueSeis-3A is today the best and most reliable rotational seismometer: 3-axis, low-noise, broadband, high dynamic range and flat passband solution with “geosciences-ready” interfaces including heading and time stamping.

A plug and play solution for easy-use on the field

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Main features and benefits:

  • 3 Interferometric Fiber Optic Gyroscopes (I-FOG) for low self-noise and broadband measurement
  • DC signal for absolute rotation measurement
  • High dynamic range
  • Ethernet output of time stamped data
  • Field-proven technology
  • Flat frequency response
  • Rotation as a new observable in seismology
  • Easy to deploy: no calibration, no tilt range limitation, insensitive to environmental conditions
  • Heading provided by the system
  • 2-in-1: «weak motion» low-noise + «strong motion» dynamic
  • Plug and play interfaces

iX-1B: a compact high-grade one-component gyroscope

iX-1B is a high-grade one-component gyroscope with low-noise, great stability, and wide dynamic range, featuring absolute digital rotation rate in mard/s.

A specific benefit of this product is its compactness which allows the integration of the sensor in complex systems. iX-1B is a highly versatile sensor thanks to limited power consumption (3 W), simple configuration of the factory-calibrated digital output, which make it the perfect ally to develop innovative solution in a large number of application: calibration, dynamic motion feedback, close-loop operation actuation etc…

Main features and benefits

  • Interferometric Fiber Optic Gyroscope
  • Absolute measurement of rotation rate
  • High dynamic range
  • Digital output factory-calibrated (no-need for user calibration)
  • Flat frequency response on very broadband 1000 s – 200 Hz
  • Low power consumption
  • Compact (compared to performance)

blueSeis-1C: a portable one component very-low-noise broadband rotational sensor

blueSeis-1C is a portable one component very-low-noise broadband rotational sensor, featuring absolute digital rotation rate in nard/s.

A specific benefit of this product is to have a sensor part without power consumption probed by a remote and compact electronic. It allows the integration of the sensor in complex systems with a limited risk of perturbation while ensuring easy access to electronic part.

BlueSeis-1C is a highly versatile sensor thanks to limited power consumption (3 W), circular shape of the sensor with empty space at its center, simple configuration of the factory-calibrated digital output, which makes it the perfect ally to develop innovative measurement system in many applications: Ocean-Bottom system, scientific instrument stabilization, Seismic station upgrade etc…

Main features and benefits:

  • Interferometric Fiber-Optic Gyroscope
  • Absolute measurement of rotation rate
  • High dynamic range
  • Digital output factory-calibrated (no-need for user calibration)
  • Flat frequency response on very broadband 1000 s – 50 Hz
  • Cold and static sensor part with remote electronic
  • Low power consumption
  • User-friendly web-MMI
  • Compact (compared to performance)
  • Optimized sensor shape to save volume of the center of the coil

An easy-to-deploy solution to get rotation as a new and rich observable in ground motion measurements.

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Specifications

  iX-1B iX-1B blueSeis-3A blueSeis-3A blueSeis -1C blueSeis -1C
monoaxe
3 axes
Passband Flat from DC to 50 Hz Flat from DC to 50 Hz Flat from DC to 200 Hz
Sensor Self Noise (Without electronic acquisition system) 450 (600) from 10-² to 50 Hz 20 (25) from 10-² to 50 Hz 4 (5) from 10-3 Hz to 200 Hz
Dynamic range ± 1 π rad/s 0.5 rad/s 125 dB LSB = 116 picorad/s 32 bit 0.1 rad/s
Operating / storage temperature -20 to 60 °C / -40 to 80 °C -10 to 50 °C / -40 to 80 °C -30 °C to 80 °C / -40 to 80 °C
Power consumption 3 W* 19W @12V 3 W*
Dimensions h-75 x ø-150 mm h-335 x ø-318 mm Height 48 mm Ext. ø 400 mm Int. free ø 260 mm
Weight 1.4 kg 20 kg 3.5 kg
Application Calibration / Metrology / Dynamic motion feedback / Closed-loop operation actuation Volcanology / Seismology / Ground tomography / Earth physics / Building monitoring Seismology / Hydrology / OBS seismometer / Large instrument denoising / Planetology / Volcanology
  Ask for quote Ask for quote
  iX-1B iX-1B blueSeis-3A blueSeis-3A blueSeis -1C blueSeis -1C
monoaxe
3 axes
Passband Flat from DC to 50 Hz Flat from DC to 50 Hz Flat from DC to 200 Hz
Sensor Self Noise (Without electronic acquisition system) 450 (600) from 10-² to 50 Hz 20 (25) from 10-² to 50 Hz 4 (5) from 10-3 Hz to 200 Hz
Dynamic range ± 1 π rad/s 0.5 rad/s 125 dB LSB = 116 picorad/s 32 bit 0.1 rad/s
Operating / storage temperature -20 to 60 °C / -40 to 80 °C -10 to 50 °C / -40 to 80 °C -30 °C to 80 °C / -40 to 80 °C
Power consumption 3 W* 19W @12V 3 W*
Dimensions h-75 x ø-150 mm h-335 x ø-318 mm Height 48 mm Ext. ø 400 mm Int. free ø 260 mm
Weight 1.4 kg 20 kg 3.5 kg
Application Calibration / Metrology / Dynamic motion feedback / Closed-loop operation actuation Volcanology / Seismology / Ground tomography / Earth physics / Building monitoring Seismology / Hydrology / OBS seismometer / Large instrument denoising / Planetology / Volcanology
  Ask for quote Ask for quote

BlueSeis on the field: applications and missions

The blueSeis’ team conducts many evaluation missions, over the world in collaboration with partners, to demonstrate the blueSeis’s measurement capabilities on seismology and volcanology, ground tomography, infrastructure monitoring and so on.

Seistans: a Fiber-optic gyrocompass for seismometer true North alignment

From 6C stations to large arrays, modern seismic analysis are more demanding on orientation accuracy and must rely on a high-quality system that gives the absolute reference for true North alignment. With Seistans, iXblue offers a fully strapdown gyrocompass that provides very accurate heading and attitude.

With its light weight and small size, it is the optimal solution for seismic sensors alignment that guarantees high precision and reliability for seismologists’ measurements. Dedicated to instrument orientation measurement on the field and operating even if GNSS is denied, Seistans comes with a full option suite to fit any specific case to transfer the North line to your instrument.

Benefits:

  • Free of export
  • GNSS denied environment compatible
  • Fast settling time
  • Maintenance and calibration free
  • 5-year warranty

Datasheets

BlueSeis-3A

(549 KB)
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iX-1B

(392 KB)
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blueSeis-1C

(385 KB)
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Seistans

(324 KB)
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Bibliography

(362 KB)
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