BB SEISMOGRAPH/ACCELEROGRAPH

The broadband seismograph/accelerograph Guardian BB is compact, flexible and reliable, equipped with recording software with a web user interface.

GUARDIAN BB

Guardian BB is ideal for structural monitoring of buildings with threshold-exceeding alerts.
The unit combines a Class 1 triaxial seismograph with a low-noise MEMS accelerograph (0.7 μg/√Hz), making it ideal for high-precision dynamic analysis. The geophone array is linearized from 1 Hz, ensuring accurate data even at low frequencies. The device is fully compliant with the main reference technical standards for structural vibrations: DIN 4150-3, DIN 45669-1, and UNI 9916.

OPTIONAL CONFIGURATIONS

  • Power over Ethernet (PoE)
  • Internal battery (up to 10 working hours)

APPLICATIONS

  • HVSR Measurement
  • Civil Monitoring
  • Seismic Networks
  • Modal analysis (OMA)

TECHNICAL CHARACTERISTICS SEISMOGRAPH

  • Sensor type: Electronically equalized geophone
  • Number of axes: 3, orthogonally oriented
  • Measure range: ± 12,5, ± 25, ± 50, ± 100mm/s
  • Sensitivity: 40, 80, 160, 320 V/m/s
  • Frequency response: 1Hz ÷ 80HZ @200Sps, 1Hz ÷ 125Hz @500/1000sps
  • Dynamic range: >130 dB

TECHNICAL CHARACTERISTICS ACCELEROGRAPH

  • Sensor type: MEMS accelerometer
  • Number of axes: 3, orthogonally oriented
  • Measure range: ± 3g
  • Frequency response: 0Hz ÷ 80Hz @200Sps, 0Hz ÷ 125Hz @500/1000sps
  • Dynamic range: 120 dB @25Sps; 108.5dB @250Sps>130 dB
  • Noise density: 0,7μg/√Hz typ.

GENERAL CHARACTERISTICS SEISMOGRAPH AND ACCELEROGRAPH

  • Samples rate: 10, 25, 50, 100, 200, 250, 500, 1000sps
  • Resolution: 32 bit
  • Timing: internal GNSS receiver, NTP, 0,5ppm drift free run RTC
  • Recording Mode: Continuous recording with SeedLink Protocol. Configurable event recording when thresholds are exceeded with selectable pre-/post-trigger length. Recording of signal statistics (min, max, average, RMS) with selectable intervals from 10 to 100s.
  • Data Storage: 32 GB internal microSD
  • File formats: Solgeo EVE, MiniSEED, Ascii, CSV

ENVIRONMENTAL CHARACTERISTICS

  • Operating Temperature: -20 ÷ +70 °C without internal battery -20 ÷ +50 °C with internal battery*
  • Storage Temperature: -40 ÷ +90 °C without internal battery -20 ÷ +50 °C with internal battery
  • Humidity: 0-100%

* during battery charge, the recommended temperature range is less extensive

PHYSICAL CHARACTERISTICS

  • Weigh: 4Kg
  • Dimensions (LxPxA): 160 mm L x 160 mm W x 130 mm H
  • Enclosure: Aluminium cabinet, painted
  • IP grade rating: IP67

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