Structural health monitoring · Strong-motion · Vibration
MEMS-SH
Seismic monitoring for buildings and structures
The compact intelligent accelerometer for seismic and structure health monitoring enabling scalable large seismic networks. The accelerometer is based on the low-noise high-resolution MEMS technology to sense impacts of earthquakes and induced vibrations.
1 / 2
Seismic monitoring of buildings and structures
Low-noise and high-resolution MEMS accelerometer with intelligent edge processing.
Continuous seismic monitoring shows how the building or structure behaves, and over months that is what reveals a shift in its resonance frequencies. Strong-motion recording captures what it went through when something shook it. The same nodes do both, so you instrument the structure once.
One cable carries both data and power, so nodes go wherever there is a network run — no separate power provisioning per sensor. Optionally, DC power to the device can be provided from a local power supply over the dedicated cable.
Sealed to IP68 and packaged for mounting on structural elements — outdoor decks, plant rooms and exposed positions, not just conditioned interiors.
Tailored NTP implementation. The nodes are synchronised to sub-millisecond accuracy.
Each node computes peak ground motions, intensities and spectral ratios from the seismic data stream in real-time. Delivering valuable insights from the moment it is plugged in, enabling large scaling networks.
Configuration, health and firmware run through SeismiQ Insights alongside every other sensor you operate.
Edge processing
Data products computed on the sensor
Ground motions, intensities, PPSD and spectral ratios are calculated on the node's in real-time. What crosses the network is already a valuable result.
Raw waveforms stream alongside, never instead. Nothing is computed that you cannot recompute.
How Insights works- STA/LTA triggerEvent detection on the instrument itself with configurable thresholds
- Real-time RMSLocal noise conditions, continuously
- PGA / PGVPeak ground acceleration and velocity
- Instrument intensitiesSpectral and Mercalli scales
- PPSDProbabilistic power spectral densities
- H/V spectraSpectral ratios for site response and resonance tracking
- AutocorrelationSingle-station ambient noise autocorrelation, for rapid change detection
- … and moreNew products arrive by firmware update, on instruments already in the field
Technical
specifications
Wiring diagrams and integration guides live in the documentation.
Sensor
- Type
- 3-component MEMS accelerometer
- ADC resolution
- 20-bit
- Sampling rate
- 40–500 SPS, selectable
- Acceleration range
- ±2 g, ±4 g or ±8 g, selectable
- Dynamic range
- ~102 dB at ±2 g (~17 ENOB)
- Self-noise
- 22.5 μg/√Hz at ±2 g
- Noise density
- -82 dB flat relative to 1 m²/s⁴/Hz
- Frequency response
- flat
Connectivity & power
- Network
- Ethernet
- Power
- PoE IEEE 802.3af 48 V; or 9–48 V DC direct, separate cable/power supply
- Time synchronisation
- Tailored NTP; Temperature compensated with subsample accuracy <1 ms
Physical
- Enclosure
- Polycarbonate, 150 x 100 x 45 mm, wall mounting latches
- Ingress rating
- IP68
- Operating humidity
- 0–100 % RH (IP68)
- Operating temperature
- −20 °C to +70 °C
- Storage temperature
- −20 °C to +70 °C
Computing, storage & interfaces
- Processor
- Quad core
- Storage
- Industrial pSLC NAND
- Firmware
- Customizable SeismiQ firmware, OTA A/B updates
- Data access
- MiniSeed, SeedLink, FDSN WebService, StationXML
- Real-time products
- PGA/PGV, instrument intensities, PPSD, H/V spectra and more
- Custom processing
- Project-specific plugins run on the instrument itself
- Calibration
- Factory-calibrated, optional site calibration through local and remote interfaces
Questions we get asked
MEMS-SH is the same SeismiQ sensing platform as the MEMS in an IP68-rated enclosure, powered over Ethernet or external DC. The acquisition chain, firmware and data interfaces are shared.
Other sensors
Tell us what you need to monitor.
Site selection, power budget, FDSN integration — we will scope it with you.