The SHOWA SOKKI MODEL-2702 Vibration Detector for earthquakes calculates 3-axis vibration acceleration, outputting seismic motion from 0 to 400 Gal (up to seismic intensity 6) via DC4-20mA. It features real-time and peak-hold output, is IP65 waterproof for outdoor use, and operates within a 0.25Hz-2Hz frequency range. Applications include safe shutdown of plant equipment, protecting facilities, and emergency shut-off of utilities. Optionally, it integrates with a MODEL-2590C digital monitor for alarm relay output and two-stage automatic shutdown.