SeismiQ MEMS-SH
The SeismiQ MEMS-SH is a 3-component accelerometer for continuous vibration, structural health, and strong-motion monitoring. It uses the same MEMS sensing chain, firmware, and data interfaces as the SeismiQ MEMS, packaged in an IP68 structural enclosure and powered through PoE or a direct DC supply.
Quick Facts
- 3-component 20-bit MEMS accelerometer with selectable ±2 g, ±4 g, or ±8 g range.
- Flat frequency response from 0 Hz to 100 Hz and selectable sampling from 40 SPS to 500 SPS.
- Ethernet connectivity with PoE at 48 V or 9–48 V DC direct power.
- Time synchronization through tailored NTP with sub-millisecond accuracy.
- IP68 structural enclosure for exposed and outdoor mounting positions.
- Operating and storage temperature from −20 °C to +70 °C.
Figure: SeismiQ MEMS-SH accelerometer for structural vibration and strong-motion monitoring.
Structural Monitoring
MEMS-SH supports continuous vibration monitoring and strong-motion recording from the same installation. On-device spectral processing can track structural resonance frequencies over time, while acceleration waveforms record earthquake, blasting, piling, and other vibration events for subsequent engineering interpretation.
Sensor and Acquisition
| Specification | Value |
|---|---|
| Type | 3-component MEMS accelerometer |
| ADC resolution | 20-bit |
| Acceleration range | ±2 g, ±4 g, or ±8 g, selectable |
| Self-noise | 22 μg/√Hz |
| Frequency response | 0–100 Hz, flat |
| Sampling rate | 40–500 SPS, selectable |
Connectivity, Power, and Timing
| Specification | Value |
|---|---|
| Network | Ethernet |
| Power | PoE 48 V, or 9–48 V DC direct |
| Time synchronization | Tailored NTP, sub-millisecond |
The network connection carries waveform data and can also power the instrument through PoE. For timing details, see Timing and Synchronization.
Enclosure and Environment
| Specification | Value |
|---|---|
| Enclosure | Structural enclosure |
| Ingress rating | IP68 |
| Operating temperature | −20 °C to +70 °C |
| Storage temperature | −20 °C to +70 °C |
Processing, Storage, and Data Access
| Specification | Value |
|---|---|
| Processor | Quad core |
| Storage | Industrial pSLC NAND |
| Firmware | Customizable SeismiQ firmware with OTA A/B updates |
| Data access | SeedLink v3, FDSN WebService, StationXML |
| Real-time products | PGA/PGV, instrument intensities, PPSD, H/V spectra |
See Real-time Analytics, SeedLink, FDSN Web Services, and Meta Data for the shared platform capabilities.