Smallest Earthquake Sensor For Autonomous IoT Systems


Omron has claimed the world’s smallest seismic sensor (9.8 x 10.9mm) designed to make systems safer and minimise the risk of secondary damage after earthquakes by safely shutting off and stopping hazardous devices. The D7S sensor can also help determine damage by mapping seismic intensity and providing building collapse information.

Designed for autonomous IoT systems, the compact D7S sensor has an internal memory and I²C interface, allowing it to be integrated into IoT devices. Potential applications include smart electricity and gas meters, wireless sensors, industrial control panels, electricity distribution panels, fire-prevention systems, home appliances such as heaters and gas stoves, chemical plants, expressways, bridges, tunnels and roads.

A notable feature of D7S is its ability to distinguish between genuine seismic activity from an earthquake or from another source. When an earthquake strikes, the D7S uses the firm’s spectral intensity (SI) value calculation algorithms to distinguish seismic activity and other movement. The sensor includes a three-axis accelerometer, and on the basis of the resulting measurements, calculates the SI value to assess the magnitude of the earthquake.

D7S is a surface mountable module with overall dimensions of just 9.8 x 10.9mm. The low power consumption of just 90 microAmp standby and 300 microAmp when processing, allows the D7S to be readily integrated into battery powered systems.

D7S Vibration Sensor

Helps Prevent Fire and Other Secondary Disasters after an Earthquake.
The World’s Smallest Class Size Seismic Sensor.

  • Using the SI value, which has a high correlation with the seismic intensity scale that indicates the magnitude of an earthquake, provides higher-precision judgment of seismic intensity scales.
  • The 3-axis acceleration Sensor and OMRON’s unique SI value calculation algorithm achieve surface-mountable compact modules and low power consumption.
  • Higher degree of freedom for incorporation into devices and prolonged operation on battery power.
  • Shutoff output terminal (INT1) operates equivalent to a conventional mechanical vibration sensor and ensures compatibility with mechanical vibration sensors.
  • I2C interface is able to obtain earthquake-related information from the Sensor with communications from external devices.

[pdfjs-viewer url=”” viewer_width=100% viewer_height=700px fullscreen=true download=true print=true]

Download PDF: d7s-data-sheet


Disclaimer: [AnythingPopup id=”2″]

%d bloggers like this:
x Logo: Shield
This Site Is Protected By