Small-type Monitoring Buoys / Equipments

• The status of the water temperature and various items can be monitored at any time on your PC or smartphone.
• The highly reliable 10-PS model lighted buoy is adopted, and it is easy to transport by manpower.
• An inexpensive mobile phone line data communication is used and a power supply that can operate continuously for three months can be equipped.
• Monitoring items can be selected according to the requirement of the fishery, such as water temperature, current direction/speed, chlorophyll turbidity, salinity, etc.
• Please feel free to contact Zeni Lite for further information.

• The status of the water temperature, current direction/speed can be monitored at any time on your PC or smartphone.
• Made of lightweight and sturdy aluminum alloy, the lighted buoy can be transported by manpower and has a durability of more than 5 years even in the open sea.
• An inexpensive mobile phone line data communication is used and a power supply that can operate continuously for one year can be equipped.
• Other observations items can be added depending on your requirement.
• Please feel free to contact Zeni Lite for further information.

• Monitoring items can be selected according to the application, such as water temperature at any depth, chlorophyll turbidity, DO, salinity, etc.
• Made of lightweight and sturdy aluminum alloy, it is highly durable and easy to handle.
• An inexpensive mobile phone line data communication is used and a power supply that can operate continuously for a long period of time can be equipped.
• Zeni Lite can propose the solar power system suitable for each product.
• Please feel free to contact Zeni Lite for further information.

• The system monitors the water temperature of 4 - 5 layers at any depth of up to 50m.
• The system consists of a water temperature sensor, a communication control terminal and a power supply.
• The system is ideal for attaching to existing buoys, rafts etc.
• In the case of hourly transmission, the system can continuously operate for approximately 8 months.
• Please feel free to contact Zeni Lite for further information.

• The standard system consists of highly durable buoy equipped with a communication control device, power supply, and a light beacon.
• By simply adding a separate compatible sensor, long-term monitoring at sea is possible.
• With a lot of operational experience this product makes the offshore monitoring operation reliable and straightforward.
• Please feel free to contact Zeni Lite for further information.

  Experience next-generation wave monitoring with our lightweight, high-performance GPS wave buoy.  Designed for ease of deployment and reliable data collection, this compact solution delivers professional-grade results.

• Compact & Lightweight − At just 800 mm in diameter and 35 kg, it’s easy to transport and deploy.
• High-Precision Wave Monitoring − Equipped with single point positioning GPS, it captures detailed wave data including wave height, direction, and period with exceptional accuracy.
• Performance That Rivals Premium Systems − Achieves accuracy on par with high-end ultrasonic and accelerometer-based wave sensors.Accuracy: ±10 cm (wave height), ±5° (wave direction)
• Real-Time Data Transmission − Seamlessly sends wave data to your PC via LTE or Iridium satellite communication.
• Built for Marine Professionals − Ideal for oceanographic research, offshore operations, and environmental monitoring.

Have questions or need a custom solution ?
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System Specifications

Categories	System Specifications
Measurement Items	Buoy Position Significant Wave Height, Period, and Direction 1/10 Highest Wave Height, Period, and Direction Maximum Wave Height, Period, and Direction Wave Count Battery Voltage (Optional: Water Temperature)
Measurement Range	Wave Height : 0∼20 m (Accuracy: ±10 cm) Wave Period : 3∼16 seconds Wave Direction : 0∼359° (Accuracy: ±5°)
Communication	LTE Communication Iridium Satellite Communication (and others)
Power Supply	Solar Panels Rechargeable Batteries

Key Features

  This product is a groundbreaking buoy-type wave meter designed to measure ocean wave data—such as wave height, direction, and period—using a single point positioning GPS sensor mounted on a compact buoy. No external positioning systems like DGPS or RTK/GPS are required.

  What sets this system apart is its innovative use of standard GPS data, which typically has an error margin of around 20 meters. By applying a proprietary digital filtering technique developed by the Japan Aerospace Exploration Agency (JAXA) (Patent No. 3658595, registered March 2005), the system achieves exceptional accuracy—comparable to traditional ultrasonic and accelerometer-based wave meters—with a wave height precision of ±10 cm and directional accuracy of ±5°.

  To further enhance wave-following performance on the ocean surface, the buoy incorporates a specially designed, lightweight, low-motion disk float. This float was developed in collaboration with Osaka Prefecture University and is protected under Patent No. 45661916 (registered August 2010).

  By combining cutting-edge space technology with advanced buoy engineering, this system delivers highly accurate wave data—including wave height, direction, and period—in a compact, efficient, and easy-to-deploy package.

System Configuration

  This system is designed for simplicity and efficiency. It consists of a compact buoy deployed at sea and a land-based computer. The buoy continuously collects wave data—including height, direction, and period—and automatically transmits it via packet communication or Iridium satellite.

  Thanks to seamless integration with the internet and email, the data is delivered in real time to your desktop or remote monitoring station. This enables fast, reliable access to critical oceanographic information—anytime, anywhere.

Positioning Accuracy

  Extensive ground simulation tests conducted by the Japan Aerospace Exploration Agency (JAXA) have confirmed that this system can accurately capture wave motion with a precision of ±10 cm in wave height and within 5° in wave direction, meeting and even exceeding its design specifications.

  The graph below shows the variation in significant wave height recorded by the buoy deployed in the Kitan Strait. The results closely match those obtained from a reference accelerometer-based wave gauge, demonstrating the system’s high reliability and accuracy.

  Notably, during this test period, Typhoon No. 6 passed near the Kitan Strait on June 21, 2004, generating waves with a significant wave height of approximately 7 meters and a maximum wave height of 10.1 meters. Even under these extreme conditions, the system successfully captured the wave data without any loss or degradation in performance.

Excerpt from a research paper published by JAXA.

• By installing a GPS wave measurement device on an existing buoy, wave observation can be performed.
• The communication device can be selected from either LTE communication method or iridium satellite communication method.
• With use of GPS data obtained by the buoy motion, high accuracy wave data (wave height, wave direction and wave period) will be measured.
• By utilizing existing buoys, it is possible to save the time and cost of buoy manufacturing.
• Based on the existing buoy movement cycle, wave analysis is performed using our original analysis program.
• Existing buoys to be equipped with this equipment shall be limited to buoys designed and manufactured by Zeni Lite.
• Please feel free to contact Zeni Lite for further information.

• Highly reliable wave height measurement buoy that is reliable, easy to operate, lightweight and low-cost. (NETIS registration number: SKK-170002-A)
• Due to its small size and light weight (20 kg), it can be installed and collected manually.
• Data communication using specified low-power wireless is adopted. There is no need for communication contracts or communication costs.
• The dedicated receiving antenna allows measurement data to be received in real time on a PC.
• It is possible to analyze spectra and other information from the recorded data with dedicated software.