ISN-SM-50 SKU ISN-SM-50-265 SEISMIC DETECTOR 50 METER SQ / Replacement for DS1535 Please log in to see price or purchase this item Request an account Line Comment Special Price Features:24-hour surveillance of vault walls and doors, safes, night safes, and automatic teller machinesLow-profile designSensitivity settings using DIP switchesSENSTEC sensor and signal processing system based on microcontrollers