Streamer Hydrophone Brochure

NH 95-250 A High Performance Hydrophone designed for seismic applications Completely waterproof Very small size Lightweight Rugged construction Long operating life SUMMARY The new generation of hydrophones is a common development of IFP and VINCI Technologies. It has been designed to improve existing hydrophones technology. This new hydrophone is based on our 20 years experience in design and fabrication of more than 1 million hydrophones. DESCRIPTION The new NH95-250 is a completely new design, which uses the latest technologies in order to reduce size and weight while increasing performance such as sensitivity versus depth or frequency response. Each hydrophone carries a kerosene proof identification tag, used to follow quality. Tests of aging are also performed in order to fit with real conditions. -205 -203 -201 -199 -197 -195 -193 -191 -189 -187 -185 dB0 1 2 3 4 5 barS=f(P) QUALITY CONTROL The quality control is based on an automated production line, which follows the fabrication and technical specifications of each hydrophone. Two types of qualification are required: - Qualification test of components material. - Qualification test of each hydrophone. Control quality supervision system SPECIFICATIONS DIMENSIONS 0.67 inch (17mm) diameter (+/-0.5mm) 0.78 inch (20 mm) length (+/-0.5mm) WEIGHT 0.48 ounce (13.6 gr.) (+/-1gr ) OPERATING TEMPERATURE 32°F to 122°F (0°C to 50°C) STORAGE TEMPERATURE -4°F to 150°F (-20°C to 65°C) DESTRUCTION DEPTH Greater than 1000 feet (300m). CAPACITY 16 nF ±5%. IMPEDANCE Greater than 500 M?, in water. SENSITIVITY 20V / bar +-18% (-194 db) Ref: 1V/ µ Pa SENSITIVITY CHANGE VS DEPTH Less than 1 dB from the initial value over the range of 0 to 164 feet (0 to 50m). SENSITIVITY CHANGE VS TEMPERATURE Less than 3 dB from the initial value over the range of 32°F to 122°F (0°C to 50°C). FREQUENCY RESPONSE Flat from 2 Hz to 1 kHz. LOWEST MECHANICAL RESONANCE Above 4 kHz. ACCELERATION Output is better than –60dB, re 1V/g, due to acceleration in the three major axes. Tests performed in air and at 20 Hz.