Nortekジャパン List of Products and Services

The SWIS ADCP version is an acoustic communication modem designed to wirelessly transmit wave and current velocity data measured by Nortek's ultrasonic current meters (ADCP) underwater. Do you have any of the following concerns? - Data cannot be retrieved without having a diver retrieve the equipment installed on the seabed. - Running an online cable to the surface incurs high costs. - Real-time monitoring requires an online cable, but there are concerns about cable breakage. The SWIS will solve these issues for you.

• Other measuring instruments

The Signature series is an ultrasonic current meter (ADCP) that can simultaneously perform direct measurements of sea surface elevation, measure circular motion current velocity below the sea surface, and obtain current velocity profiles. Using time series analysis and spectral calculations on the acquired data, it is possible to derive various wave parameters, including wave height and wave direction. For water depths exceeding the measurable range for wave measurement, the device can be mounted on a mid-water float for measurement. (*Nortek patented technology) The maximum water depth for wave observation is 150m, making it suitable for surveys at floating offshore wind power sites exceeding 50m in depth. 【Features】 - Direct measurement of sea surface elevation using ultrasonic technology with vertically arranged transducers - Continuous and simultaneous measurement of waves (sea surface elevation, circular motion current velocity) and current velocity profiles (multi-layer current velocity) (Nortek patented technology) - The measurement position of circular motion current velocity can be changed during post-processing (Signature1000/500) *For more details, please download the PDF or contact us.

• Other measuring instruments

Ideal for those looking for small Doppler velocity logs, ground and water speedometers, underwater sensors, etc. → Want to automate ROVs (for those considering inspections of offshore structures, etc.) → Want to achieve underwater positioning for ROVs and accurately grasp underwater location information! → Want to maintain a certain distance from the seabed, dam walls, underwater structures, etc. → Considering the effective use of a Doppler velocity log (DVL) for installation, but... - Limited installation space - Wiring and calibration work with DVL and attitude control sensors is cumbersome. - Want to measure both ground speed and water speed. - Want to accurately grasp attitude using AHRS. - Want environmental data (water temperature, current direction and speed meter (ADCP function), pressure). - Want a simple and accurate small DVL unit! - (Also want to keep costs down if possible...) < This is convenient! Vehicle-mounted support features > - For Python - For BlueOS (for BlueROV2) - For ROS2 (Robot Operating System 2) Dedicated drivers are available. Released in 2022! Increasing domestic installation achievements! INS function license to be added from 2024!

• Work boats, research vessels, underwater work machines

We have streamlined the complex mechanisms involved in handling flow velocity sensors and revamped the design and functionality to enable measurements with as few steps as possible. For the first time at Nortek, data quality verification and processing will be performed in the cloud (eliminating the need for dedicated analysis software). Japanese language support is available. [Easy Operation] Automatically sets three water depths and continues measurements while tracking water level changes. Users do not need to specify the measurement depths. [No Cables Required] Non-contact communication (for Eco and disconnection device settings) *Uses the built-in Bluetooth communication function of a smartphone or PC. [No Battery Replacement Needed] Uses a built-in rechargeable battery with non-contact charging. [Simple Setup] Settings can be configured via a web page on the internet or a smartphone app (iPhone and Android compatible apps are available: Nortek Eco; the web page can be accessed via "Related Links"). [Features, etc.] - Low water depth compatibility: Measurements can be taken from 30 cm above the device. - Number of measurement points (water depth, layers): 3 - Equipped with GNSS - Multi-color LED for operation confirmation *Installation is only upward. *Output data will be the horizontal flow velocity (east, west, south, north) at three water depths, but the measurements are three-dimensional flow velocities.

• Consulting companies
• Surveying Consulting
• Other measuring instruments

Aquadopp is a compactly designed yet user-friendly single-point current velocity and direction meter. It is primarily used for time series analysis of variations in current velocity and direction at a constant water depth. The measurement point for current velocity and direction can be set up to 5 meters away from the device via software. This feature, which utilizes ultrasound to measure the current velocity at a remote location, minimizes the effect of structures such as frames and mooring lines that could disrupt the flow and adversely affect the velocity data. Aquadopp lineup: - For coastal areas: Aquadopp 300m (300m depth pressure resistant) - For deep-sea mooring: DW Aquadopp (3000m depth pressure resistant, 6000m depth pressure resistant) - The Aquadopp 6000m also has a version compatible with inductive modems. The Aquadopp 300m model allows for wave measurement using a pressure gauge. It is possible to run a timer between current velocity and direction measurements.

• Coastal construction
• Harbor Construction
• River construction

The Vector is a high-precision single-point flow direction and velocity meter that can be set to a sampling frequency of up to 64 Hz. To perform remote flow direction and velocity measurements using ultrasound, it is not necessary to place sensors within the measurement area. Measurements can be taken without disturbing the flow conditions in the target area. It is particularly effective for measuring flows in complex situations, such as those occurring behind structures, in breaking wave zones, and near the seabed, where measurements are difficult with ADCPs. There is also a deep-sea version of the Vector with a titanium pressure-resistant housing that can withstand depths of 6000 meters. It can be used in various environments, from field marine areas to flow measurements in hydraulic experiment tanks.

• Harbor Construction
• Coastal construction
• River construction

AWAC is a wave measurement device that uses ultrasonic Doppler technology, making it ideal for simple wave observation (deriving wave parameters). It is also equipped with traditional multi-layer current velocity measurement functions (ADCP), allowing for the measurement of both waves and current conditions. For more advanced and flexible measurements of waves and current conditions, we recommend the multifunctional ADCP "Signature" series, which includes AWAC's wave measurement capabilities. AWAC emits sound waves from a transducer located at its center towards the sea surface to directly measure the water surface elevation, calculating wave height and its period. By emitting ultrasonic waves from three transducers, it measures the near-surface current velocity (caused by the circular motion of waves) to derive the wave direction spectrum. By using ultrasonic technology to measure the sea surface, accurate wave height and direction measurements can be achieved even from the seabed at depths of up to 100 meters, which is difficult with pressure gauges alone. Utilizing a uniquely developed SUV method, accurate wave measurements can be achieved even when mounted on a mid-water float (patented). By using a mid-water float in areas deeper than 100 meters, wave measurements can be conducted as long as the main device is kept at a depth of 100 meters or shallower.

• Coastal construction
• Harbor Construction
• River construction

The Signature1000 and Signature500 are lightweight, compact, and multifunctional acoustic Doppler current profilers (ADCP) designed to meet various measurement needs in coastal areas. Functions such as wave, turbulence, sea ice, and echogram measurements can be freely selected and added later. Echograms can be obtained by using a transducer positioned at the fifth center as an echo sounder, allowing for high-resolution measurement of underwater biomass. With the new AD2CP platform, it is now possible to simultaneously execute multiple measurement functions (patented technology), enabling the acquisition of high-density information in a short period. They are also optimal tools for turbulence observation. Regarding sampling frequency, the Signature1000 has a maximum of 16 Hz, while the Signature500 has a maximum of 8 Hz. It has become possible to analyze parts of the turbulence spectrum that were previously difficult to measure.

• Hydrological survey
• Environmental Survey
• Other measuring instruments

The Aquadopp Profiler is a highly versatile ultrasonic Doppler current profiler (ADCP). There are four types in the lineup depending on the measurement range (distance). It is the ideal ADCP for those who want to simply conduct multi-layer current and velocity observations. In particular, it allows for wave measurements using a pressure gauge to be performed between current and velocity measurements, making it a series with high cost performance. The model equipped with the Z-Cell function can emit sound waves horizontally from the sensor head, allowing for the measurement of flow around the instrument. This feature enables the measurement of flow very close to the instrument, which was difficult with conventional ADCPs. The measurement range is from less than 1 m to over 85 m. The measurement range is determined by the acoustic frequency of each model. (Model name: Maximum measurement range) - Aquadopp Profiler 2MHz: 20m - Aquadopp Profiler 1MHz: 25m (including Z-Cell) - Aquadopp Profiler 600kHz: 40m (including Z-Cell) - Aquadopp Profiler 400kHz: 90m

• Harbor Construction
• Coastal construction
• Environmental Survey

To meet the growing global demand for measurement, we have expanded DVL's product lineup. And now, the long-awaited navigation package, which incorporates DVL and AHRS, has been newly launched in a palm-sized form, making it one of the smallest in the industry! It is adopted and mounted on various platforms, from small/micro-sized to work-class vehicles. In recent years, it has also been successfully used in large ASVs, UUVs, underwater gliders (specialized components), and even in ocean racing yachts (UK). Introducing the Nucleus1000!! An ultra-compact DVL navigation package equipped with DVL functionality and AHRS Measurement height: 0.05m to 50m, pressure resistance: 300m DVL1000 Measurement height: 0.2m to 75m, pressure resistance (2 models): 300m/4000m DVL500 (Compact) Measurement height: 0.3m to 175m, pressure resistance (2 models): 300m/4000m DVL500 Measurement height: 0.3m to 200m, pressure resistance (2 models): 300m/6000m DVL333 Coming soon Measurement height: 0.3m to approximately 400m, pressure resistance (2 models): 300m/6000m

• Structural Survey
• Civil Engineering Company
• Construction company

Signature55 is a multi-layer current velocity profiler with a pressure resistance equivalent to a water depth of 1500m and a measurement range of 1000m. Equipped with Nortek's new AD2CP platform, it achieves efficient observation mode control and low power consumption. Utilizing proprietary broadband signal processing, it enables reliable and high-precision data acquisition. Additionally, the design has been revamped to be compact and facilitate easy handling in the field. With the newly designed transducer, it performs the work of two devices in one. It can operate at two frequencies (55/75kHz), allowing for both extensive spatial measurements and high-resolution measurements (dense measurements in the depth direction) with a single unit. By using an AHRS (Attitude and Heading Reference System, optional), it corrects the displacement of the measurement position (cell position) in real-time due to the device's motion. This allows for more accurate current velocity measurements even in environments with significant motion, such as when mounted on a surface buoy.

• Other measuring instruments
• Other civil engineering works
• others

The Signature100 is a completely new ADCP equipped with both a flow direction and velocity profiler (with a measurement range of 400m) and a scientific fish finder sensor (echo sounder). For example, when focusing on the relationship between the behavior of fish and microorganisms (such as krill) in the ecosystem and ocean currents, it was previously necessary to measure acoustic reflections (echograms) and flow direction and velocity data with separate devices. The Signature100 allows for the acquisition of both types of data with just one device. Specifications of the scientific fish finder sensor: Beam width: 15° (70 kHz), 8.7° (120 kHz) Monochromatic pulse: 70kHz, 90kHz, 120kHz Frequency chirping: center frequency 100kHz (BW50%, 70kHz–120kHz) Vertical data spatial resolution: 0.375–4m (1800 data points) Pulse length: 0.5–6ms Resolution: 0.01dB Dynamic range: 130dB

• Hydrological survey
• Other measuring instruments
• Environmental Survey

This product is made of a transparent film that uses a slippery special material, designed so that marine organisms cannot remain on the surface of the film. It does not release any substances into the ocean, thus having no impact on the environment. Additionally, it has been specially developed to adhere to the transducer material, ensuring a reliable attachment over a long period during the observation period. The transducer surface of the ADCP cannot have any enclosures that would block sound waves, as it is used for transmitting and receiving sound waves. Some soft bottom paints may be used to prevent marine organism attachment to the transducer surface, but they have the drawback of being difficult to clean and handle after observations. When shellfish attach, the energy of the sound waves is absorbed, making it impossible to achieve the original measurement range. Furthermore, if organisms with air bubbles or moisture attach, they can block most of the sound waves, leading to cases where measurements cannot be taken. Very simple attachment process: Attaching to the transducer surface should be done like a regular sticker to avoid air bubbles, and after the observation, the film can simply be peeled off to complete the task.

• Hydrological survey
• Other measuring instruments
• Environmental Survey

Nortek's ship-mounted ADCP package, Signature VM, includes verified components (ADCP, GNSS, PC, cables) as a set, lowering the barrier to preparing equipment and expanding opportunities for conducting flow condition observations while navigating. The Signature VM Ocean, which includes the newly released Signature 100 that supports a depth range of 350m, is now available! In addition to flow condition observations (ADCP), it also offers echo sounder (fish finder) functionality. While obtaining flow direction and velocity information, it can display the movement of fish, microorganisms (such as plankton), and suspended particles in real-time on the screen aboard the vessel. Features: - Real-time display of echo sounder functionality (new feature!) - Flow direction and velocity measurement using all 5 beams (4 beams) and depth measurement (vertical beam) - Excellent bottom tracking performance - A consistent system with good response and high operability - A package for unmanned boats (USV/ASV) is also available.

• Harbor Construction
• River construction
• Dam construction