---
title: "MEMS Sensors for Building Motion | SismoSmart"
description: "Pre-launch technical overview of MEMS sensing, event buffering, and building-motion analysis; detection and performance remain subject to pilot validation."
locale: en
canonical_url: https://sismosmart.com/en/technology
last_updated: "2026-07-26"
---

# MEMS Sensors for Building Motion | SismoSmart

> Pre-launch technical overview of MEMS sensing, event buffering, and building-motion analysis; detection and performance remain subject to pilot validation.

Canonical HTML page: [https://sismosmart.com/en/technology](https://sismosmart.com/en/technology)

## MEMS accelerometer

Inside sits an ADXL355-class MEMS sensor, roughly 100 times more sensitive than the accelerometer in a phone. It samples three axes 250 times per second and reaches a noise floor around 22 micro-g. Modest next to a professional seismic station, but lab-grade for consumer hardware.

## STA/LTA detection

The device compares the average of the last half second against the average of the last thirty seconds. When that ratio jumps, there's an event. The method is called STA/LTA and it's a seismology standard. Pilot calibration is intended to separate common building noise from shaking, but false positives and missed events remain possible until field validation is complete.

## Local event buffer

Once the threshold is crossed, the device writes a 40-second window to memory: four seconds before the event and thirty-six after. If the internet happens to be down, it keeps the recording and sends it when the connection returns. A phone app can't do this.

## Cloud confirmation

One device triggering isn't strong evidence on its own. When three or more devices in the same area trigger within 60 seconds, the event gets marked as confirmed. This is where the false-alarm rate drops sharply. Public sources like AFAD and USGS provide an extra cross-check.

## Structural health tracking

Every building has a natural frequency, the rate at which it tends to sway on its own. Structural damage pulls that number down. The device measures it weekly, learns the seasonal pattern, and flags an unexpected drop. The technical name for this is modal analysis.

## Engineer-facing report

After an event, the report carries peak ground acceleration (PGA), peak ground velocity (PGV), a Modified Mercalli intensity estimate, and the percentage shift in your building's natural frequency. These are standard earthquake-engineering metrics. We aren't inventing a new scale.

## Connectivity

V1 runs on 2.4 GHz Wi-Fi. The enterprise version (V2) will add LTE-M cellular and LoRa mesh, so building managers won't have to bring the device onto the office Wi-Fi.

## Power

Standard USB-C, 5V/2A. A 1 farad supercapacitor inside gives 30 to 60 seconds of bridge power during an outage, which is enough to push the last event to the cloud. There's no battery to replace and no maintenance schedule.

## Certification

Before V1 ships: CE RED, Turkey's BTK frequency approval, RoHS and WEEE compliance. All data flows get documented under KVKK. FCC approval for the US market is a later step.

## Terminology

- [Seismic monitoring glossary](https://sismosmart.com/en/glossary)

## Safety and product status

SismoSmart is not an emergency service and does not determine whether a building is safe. Follow official alerts and qualified engineers.

SismoSmart is a pre-launch product. Hardware, detection, connectivity, performance and certification details are design targets until pilot validation and formal approval.

## Machine-readable resources

- [Concise LLM summary](https://sismosmart.com/llms.txt)
- [Expanded LLM context](https://sismosmart.com/llms-full.txt)
- [Public agent guidance](https://sismosmart.com/AGENTS.md)
- [OpenAPI contract](https://sismosmart.com/openapi.json)

## Sitemap

- [Human-readable sitemap](https://sismosmart.com/sitemap.md)
- [XML sitemap](https://sismosmart.com/sitemap.xml)