BHStreamer − Bottom hydrophone streamer

Product code : 1752894767

Streamlined solid-state design Wide frequency range (1 ÷ 8 000 Hz) Low-noise preamps Optional pressure sensors

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Introduction
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BHStreamer – a universal bottom hydrophone streamer designed for performing seismic surveys or monitoring in the water area. The streamer is manufactured in 24-channel or 48-channel versions with any pitch between single quick-response and acceleration-insensitive hydrophones. High-quality data is also ensured by low-noise preamps on each channel, shielded cables and a solid-state streamlined design without any cable tails.

A wide frequency range (1 ÷ 8 000 Hz) provides registration of all types of waves, including Scholte ones, which can be used to determine the velocities of guided S-waves in the upper part of the section via UMASW (Underwater Multichannel Analysis of Surface Waves) method.

BHStreamer can be connected to any modern linear seismograph – just provide us with the model of it so that we can install a compatible connector and ensure its correct pin arrangement.

While performing data processing, it becomes especially important to describe the acquisition layout, for which it is necessary to be capable to calculate the position of each hydrophone on the bottom. In shallow waters, this problem is resolved by simple referencing of each channel with standard features. At depths of more than 1 m, the coordinates can be calculated using optionally installed pressure sensors with the necessary step along the streamer or by calculating the RP coordinates through a direct wave from the source.

Specifically, for the BHStreamer we have developed 2 versions of shielded load-bearing cables with longitudinal sealing. The durable polyurethane cable sheath remains flexible in all weather conditions, does not break down on deck from UV light, is ideal for seawater and provides excellent maintainability. Kevlar reinforcement and stainless-steel Kellems grip installed at the beginning and end of the streamer ensure the safety and convenience of installing the receiving line on the bottom, using an anchor fixed at the end of the streamer, and its reliable fastening on the ship.

Power to the pre-amplifiers located in the immediate vicinity of the hydrophones is provided by the included battery pack or an optional low-noise power supply.

Marine (SWS), freshwater (FWS) or deep-water (DWS) sparkers along with MultiJack energy sources are used as high-frequency sources as well as seismic guns with civilian blank cartridges.

Package contents:

Seismic Streamer
Battery pack
Battery charger
Low-noise power supply (optionally)
Reel or winch (optionally)
Pressure sensors (optionally)

To select the right configuration of the streamer or to draw up a technical specification for the purchase or rental of a complete equipment set of equipment for performing the survey, contact us in any way specified on the website. The data processing capabilities can be found here. We can also provide training for your staff in equipment and data processing skills as well as accompany or launch your project.

Streamer
Type	linear with pre-amplifiers
Number of channels	24 or 48
Geophone group interval	2, 4 and 5 m or as agreed
Type of end connector	as agreed
Outer diameter	42 mm
Piezoelectric element
Operating frequency range	1 – 8 000 Hz
Sensitivity of the piezoelectric element	180 mkV/Pa
Capacitance of the piezoelectric element	4000 pF
Maximum operating pressure	40 atm
Preamplifier
Type of pre-amplifier	low-noise asymmetric
Gain factor	6 dB
Current consumption per channel	10 mА
Output impedance	395 Ohm
Supply voltage	±12 V, bipolar
Maximum output level	±3.8 V
The root-mean-square voltage of the intrinsic electrical noise, given by the output, in the operating frequency band	≤10 mkV
Operation conditions
Operating temperature range	-10 ÷ +70 °С
Storage temperature range	-40 ÷ +70 °С

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BHStreamer − Bottom hydrophone streamer

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BHStreamer − Bottom hydrophone streamer

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