Main body integrated type. Possible to significantly reduce installation costs
Main body integrated with the sensor. Easy to install - Just place on the wall. Possible to
significantly reduce installation costs.

Real-time announcement of the seismic intensity at the installation place
Since the seismic intensity at the installation place is measured in real-time, the timing for
issuance of warnings will not be missed!

Possible to measure seismic intensity in detail
Real-time detailed measurement of seismic intensity to the first decimal place, e.g. 5.2, 4.6.

Possible to set a threshold of seismic intensity for issuing advisories/warnings
Possible to separately set a threshold of seismic intensity for issuing advisories or warnings.

Control of external devices when seismic intensity exceeds a threshold for issuing warnings
When seismic intensity exceeds a set threshold for issuing warnings (advisories), external
devices, such as broadcasting equipment, flashlights, and electronic bulletin boards, are
controlled!

Possible to set a threshold of seismic intensity for cancelling warnings/advisories
Possible to make an announcement until or after an earthquake completely stops!

Keeping of a record of the maximum seismic intensity
Possible to check the maximum seismic intensity measured in real-time.

Control test/Emergency drill
Possible to conduct control tests of external devices, such as broadcasting equipment,
flashlights, electronic bulletin boards, and industrial machinery, and have emergency drills.
Download brochure
Contact output
English Overview
Download Instruction manual

There are 3 contact outputs: Warning relay contact output, Advisory relay contact output
and Cancel relay contact output.

There is no polarity.
緊急地震速報
Download Setting Program(optional)
Main specifications
External view and names
S-wave
Issue a warning
Real-time issuance of earthquake warnings
緊急地震速報
Real-time observation of S-waves
and issuance of warnings
Issuance of earthquake warnings with devices,
such as broadcasting equipment and flashlights
Emergency stop of industrial machinery, etc

Emergency evacuation from dangerous places4
when seismic intensity exceeds a threshold
for issuing warnings
Download Instruction manual
Download brochure
Model number: BS-ES4571J
Download brochure
Download Setting Program(optional)
Download Instruction manual
Download Setting Program(optional)

Seismic intensity scale and measured seismic intensity

JMA provides the following correspondence table of measured seismic intensity
and seismic intensity scales.

Block diagram

Contact rating DC24 V max. 250 mA or less  AC: 100 V max. 200 mA or less

Real-time observation of S-waves.  Controls external devices by contact output
when seismic intensity exceeds a set threshold for issuing warnings.
Real-time issuance of earthquake warnings