LIFEDETECTOR SYSTEM
Delsar, Inc.: Seismic/acoustic omnidirectional sensors. Position insensitive 1 Hz to 3,000 Hz. Simultaneous amplitude display of any two sensors. Monaural or stereo listening. Small intercom probe (micro-phone/speaker) for detection of airborne sounds in voids. Available in two-, four-, or six-sensor configurations. Uses six standard alkaline C-cells. (800) 848-1064.
