3-axis accelerograph Guardian BB

triaxialMEMSseismic

Overview
The Guardian BB by SolGeo is a compact broadband seismograph and accelerograph combining a Class 1 triaxial seismograph with a low-noise MEMS accelerometer (0.7 μg/√Hz). Designed for structural monitoring, the unit provides continuous recording, threshold-triggered events and a web-based recording interface. The sensor array is linearized from 1 Hz, ensuring accurate low-frequency data. Device conforms to 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 structural monitoring
• Seismic network stations
• Operational modal analysis (OMA)

Technical characteristics — Seismograph
Sensor type: Electronically equalized geophone
Axes: 3, orthogonally oriented
Measure ranges: ±12.5, ±25, ±50, ±100 mm/s
Sensitivities: 40, 80, 160, 320 V/m/s
Frequency response: 1 Hz ÷ 80 Hz @200 Sps; 1 Hz ÷ 125 Hz @500/1000 Sps
Dynamic range: >130 dB

Technical characteristics — Accelerograph
Sensor type: MEMS accelerometer
Axes: 3, orthogonally oriented
Measure range: ±3 g
Frequency response: 0 Hz ÷ 80 Hz @200 Sps; 0 Hz ÷ 125 Hz @500/1000 Sps
Dynamic range: 120 dB @25 Sps; 108.5 dB @250 Sps; >130 dB
Noise density: 0.7 μg/√Hz (typ.)

General characteristics
Sampling rates: 10, 25, 50, 100, 200, 250, 500, 1000 sps
Resolution: 32 bit ADC
Timing: internal GNSS receiver, NTP, high-stability RTC (0.5 ppm drift-free run)
Recording modes: continuous recording via SeedLink; configurable event recording with selectable pre/post-trigger and recording of signal statistics (min, max, avg, RMS) with intervals 10–100 s
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%

Physical characteristics
Weight: 4 kg
Dimensions (L x W x H): 160 mm x 160 mm x 130 mm
Enclosure: aluminium cabinet, painted
IP rating: IP67

Specifications

• Model: Guardian BB
• Brand: SolGeo
• Class 1 triaxial seismograph integrated with low-noise MEMS accelerograph (0.7 μg/√Hz)
• Geophone array linearized from 1 Hz
• Seismograph ranges/sensitivities: ±12.5 to ±100 mm/s; 40–320 V/m/s
• Accelerometer range: ±3 g
• Sampling: 10–1000 sps; 32-bit ADC
• Timing: GNSS, NTP, high-stability RTC (0.5 ppm)
• Recording: continuous with SeedLink; configurable event recording; signal statistics
• Storage: 32 GB microSD; formats: MiniSEED, SolGeo EVE, ASCII, CSV
• Environmental: wide operating/storage temperature ranges; 0–100% humidity
• Physical: 4 kg; 160×160×130 mm; aluminium enclosure; IP67
• Optional: PoE, internal battery (up to ~10 h)
• Compliance: DIN 4150-3, DIN 45669-1, UNI 9916