FSI - Model HMS-AT650 ULF -Sub-Bottom Profiler

Ultra-rugged, High-Power, Ultra Low-Frequency, Compact Sub-Bottom Profiling System

The System generates CHIRP signals in the 200 Hz to 2 kHz frequency range and is suitable for operation in a variety of array configurations to support many different shallow water sub-bottom profiling applications.

Components of the ULF System include a standard single or dual frequency CHIRPceiverTM, a dedicated ULF Matching Driver, the HMS-AT650 transducer, and a specialized hydrophone streamer.

The HMS-AT650 transducer is based on a high efficiency piston loaded flextensional design. Single transducers can support up to 3,000W power levels at a 30% duty cycle depending on the depth of operation. Multiple transducers can be arranged in multi-element
arrays to support a wide variety of beam patterns and source levels to suit most survey applications. The transducer can be either mounted on a rigid support or towed behind a small vessel using the optional vehicle shown in the photo.

• Power Rating: 3,000 Watts at 30% duty cycle,
• Transmitting Response per Volt: 138 dB re 1uPa/1V@1m @650Hz
• Nominal Impedance: 1,200 ohms @ 650Hz
• Directivity: Omni
• Maximum Operating Depth: 300m