NexSens CB-40 Data Buoy
- Integrated 4" diameter stainless steel slotted instrument pipe
- Supports 1-3 nautical mile light for deployment in navigable waters
- Lightweight system can be deployed by a single person
|CB-40||Data buoy with polymer-coated foam hull, 40 lb. buoyancy|
|Usually ships in 3-5 days|
|M550-F-Y||Solar marine light with flange mount & 1-3 nautical mile range, 15 flashes per minute, yellow|
|Usually ships in 3-5 days|
The CB-40 Data Buoy offers a compact and affordable platform for deploying water quality sondes and other instruments that integrate power and data logging. The lightweight platform can be deployed from small boats, large vessels or even helicopters, making it the ideal choice for applications where water needs to be monitored at a moment’s notice. The buoy can also be used as an underwater float and instrument housing for subsurface deployments.
The buoy is constructed of an inner core of cross-linked polyethylene foam with a tough polyurea skin and stainless steel frame. An optional 1-3 NM solar marine light mounts over the topside access hole, and three eyenuts offer a convenient lifting point. The CB-40 supports a 1, 2, or 3-point mooring via bottom bow shackle and three eyenuts. Optional accessories include chain, shackles and anchors for buoy mooring.
The CB-40 Data Buoy weighs 38 lbs. with no payload and approximately 45 lbs. with integrated solar marine light and water quality sonde. The 4" stainless steel instrument pipe securely houses the instrument and includes slotted holes for water flow. Compatible instruments include YSI 6-Series & EXO sondes, Hydrolab Series 5 & HL sondes, Eureka Manta sondes, and In-Situ Aqua TROLL instruments.
- Hull Dimensions: 14" (35.56cm) outside diameter; 20" (50.80cm) tall
- Instrument Pipe Dimensions: 3.87" (9.83cm) inside diameter; 48" (121.92cm) tall
- Weight: 38 lbs. (no payload); 45 lbs. (with sonde & solar marine light)
- Buoyancy: 40 lbs.
- Hull Material: Cross-linked polyethylene foam with polyurea coating & stainless steel deck
- Hardware Material: 304 stainless steel
- Mooring Attachments: 1, 2, or 3 point
No, the CB-50 and larger buoy platforms can accommodate this feature.
Any submersible instrument with internal power & data logging that fits within a 4” diameter x 48” long pipe could be deployed from this platform.
There are no waterproof housing compartments on this platform. The CB-150 and larger buoy platforms can accommodate sensitive electronics inside the data well.
The CB-40 can be deployed subsurface with an anchor heavier than the net buoyancy of the deployed equipment. This is useful when monitoring at a fixed distance from the bottom of the water body.
Generally, no more than one point moorings are necessary due to the structure of the deployment pipe. Tangling is not a factor as instruments are enclosed in the pipe and do not hang freely below the CB-40. And, since cages are not a possible added feature to the CB-40, one anchor line is sufficient unless conditions are unusually rough.
Buoy maintenance depends solely on the surrounding conditions. Water quality measurements could read inaccurately if the instrument pipe becomes clogged or covered with debris. High biological fouling will call for more frequent cleanings, typically in wastewater lagoons or bays with zebra mussels and barnacles present. We suggest to visit the buoy once a week or once a month at first, depending on local conditions, and assessing how often cleanings are necessary.
The CB-40 buoy is not designed for solar power or auxiliary battery packs. The compact, four inch diameter instrument tube holds any small sensors, some of which include integrated batteries and data logging capability. No real-time data telemetry is available for the CB-40 buoy due to the small size. Planning trips to the buoy will depend on maintenance demand and battery and data storage capability.
In The News
In 2012, for maybe the first time, Lake Superior got scummy.
Visitors to the Apostle Islands National Lakeshore reported algae washing up on shore around the park.
It was a marked shift for the park, made up of a portion of the Lake Superior lakeshore and nearby islands. The water surrounding the park is cold, clear and typically low in nutrients: a combination unlikely to result in algal blooms.
But, in 2012 and again in 2018 after violent storms, major algal blooms—ones observed over multiple days—washed ashore and clogged the beaches with unsightly, scummy algae.
Not the usual suspects
The algal blooms of Lake Superior are not the algal blooms of warmer, more nutrient-rich lakes like Lake Erie.Read More
*This is part two of a series on changing ancient lakes. See part one, Lake Baikal, here .
Ancient lakes are facing a suite of rapid, unprecedented anthropogenic changes. While ancient lakes are spread around the world and vary widely from lake to lake, their incredible age, which can reach into the tens of millions of years, makes them unique resources to science.
They host incredible biodiversity and long sediment records. They are vital sources of food and water for millions of people. In a changing world, ancient lakes’ value as scientific and natural resources and the incredibly diverse life they contain is under threat.Read More
*This is part one of a two part story on ancient lakes. Part two , Lake Tanganyika, available here.
Lakes that have supported human settlements for thousands of years are starting to feel humans’ effects in rapidly developing and significant ways.
From climate change to nutrient loading to plastic pollution, ancient lakes are straining under some of the least welcome contributions of humanity. The changes could have consequences for the diversity of life within the lakes and the human populations that rely on it.
And, while ancient lakes have been around long enough to weather past climatic changes, the changes occurring now are so rapid, the end result is uncertain.Read More