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Bosch - ISN-SM Series Seismic Detectors (ISN-SM-50) Each seismic detector surveys objects and surfaces, has a low-profile design, and is easy to install in small spaces. The Seismic Detector detects vibrations caused by exposives & tools such as diamond tipped drills, mechanical and hydraulic pressure tools,flame cutters, thermal lancers or water jets. Please download data sheet for more technical information.