R15I-UC is an underwater, narrowband sensor with very high sensitivity in the frequency bandwidth 50 – 400 kHz. The sensor features an integral preamplifier with 40 dB gain. The integrated electronics give the sensor a signal-to-drive capability for depths of 300 meters (1000ft) or more. The sensors feature special polymer coatings making it 100% insulated and non conductive with an integral neoprene jacketed waterproof cable for underwater use. The sensor is tested to depths of 1000 psi.