ACCELEROGRAPH The broadband seismograph/accelerograph Guardian BB is compact, flexible and reliable, equipped with recording software with a web user interface. Guardian BB is ideal for structural monitoring of buildings with threshold-exceeding alerts. Guardian BB is a compact. Class 1 triaxial seismograph and a low-noise MEMS accelerometer for dynamic measurements on structures in compliance with the reference standards DIN 4150-3, DIN 45669-1, and UNI 9916. It includes an 1Hz electronically linearized geophone triad plus a MEMS accelerometer with noise level of 0.7 pg/VHz. A special system on the bottom plate allows it to be fixed to the floor/wall with a single bolt, and three adjustment screws ensure leveling. It uses flash memory to store velocity and acceleration data and offers various Internet connectivity methods. It can function as an FTP/SFTP client and SFTP server and use standard transmission protocols, such as SeedLink for real-time data transmission to popular software applications such as SeisComP, Sworm, etc. The device is managed via Seismic Web Configurator (SWC), an intuitive and highly usable web interface that allows complete device configuration and provides real-time operating status, data management, and waveform display. The operating status is indicated by LED indicators. Threshold exceedance notification is provided via email and/or a dedicated digital output. • HVSR Measurement • Civil Monitoring • Seismic Networks • Modal analysis (OMA)

Sensor type Number of axes Measure range Sensitivity Frequency response Dynamic range Noise floor Electronically equalized geophone ACCELEROGRAPH TECHNICAL CHARACTERISTICS Sensor type Number of axes Measure range Frequency response Dynamic range Noise density Non-linearity Offset drift Full scale drift Samples rate Resolution Timing SYSTEM CONFIGURATION MEMS accelerometer 3, orthogonally oriented ± 3g Internal 0,5ppm drift free run RTC, NTP, internal GNSS optional

GUARDIAN BB SEISMOGR APH AND ACCELEROGR APH ACQUISITION UNIT CHARACTERISTICS Resolution Samples rate 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 File formats Solgeo EVE, MiniSEED, Ascii, CSV Ethernet 10-100 / WiFi (Client and Access Point) Triggering mode STA/LTA, threshold level, scheduled Support software Integrated...

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