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Ultra-Compact High Accuracy Earthquake Detection Sensor Module

Ultra-Compact High Accuracy Earthquake Detection Sensor Module

ROHM released an ultra-compact high accuracy seismic detection sensor module, BP3901, which is ideal for applications requiring reliable earthquake detection, such as automatic doors, unmanned transport vehicles, and smart meters. The new sensor BP3901 integrates an original earthquake detection algorithm and offers high accuracy. The sensor feature built-in false detection prevention function and can accurately distinguishing between vibration due to earthquakes or other external factors. 


BP3901 specifications 

  • Size: 11.8 x 8.6 x 2.5 mm
  • Angle compensation function: ±15° mounting tolerance
  • Standby current consumption: 3.5uA
  • Operation time: up to 5 years


BP3901 Features 

  • 3.5uAhigh Accuracy Earthquake Detection in a Compact Module Form Factor
  • Contributes to longer application operation by reducing standby current consumption
  • Stores seismic data for analysis



  • Smart meters (power, gas)
  • Unmanned transport vehicles
  • Automatic doors
  • Infrastructure such as roads and buildings
  • Vending machines
  • Household appliances (i.e. fan heaters, lighting)
  • Distribution boards (breakers), AC outlets


The samples of the BP3901 is available now and OEM quantities will be available from August 2019. For more information visit ROHM website.