The CB-40 offers a compact and affordable platform for deploying water quality sondes and other instruments that integrate power and data logging



With an overall 14-inch diameter by 48-inch height, the CB-40 can be deployed quickly and easily from a small boat. Fully configured systems typically weigh around 45 lbs.

Topside Plate

A stainless steel topside plate supports solar marine lights and offers a convenient lifting point via (3) eyenuts.

Center Hole

The center hole offers instrument access and includes space for additional instrumentation, battery packs, or other waterproof electronics.

Multi-Vendor Compatibility

Compatible instruments include YSI 6-Series & EXO sondes, Hydrolab Series 5 & HL sondes, Eureka Sub 2 & Manta 2 sondes, and In-Situ TROLL 9500 instruments.

Instrument Pipe

A 4-inch stainless steel instrument pipe securely houses the sonde or water quality instrument and includes slotted holes for water flow.

Solar Beacon

The optional solar marine light has a one to three nautical mile range and securely mounts to the buoy top plate for maximum visibility.

Built to Last

Constructed of cross-linked polyethylene foam with a heavy polymer skin and an indestructible stainless steel frame, the CB-40 is designed for years of service.
Hull Dimensions14" (35.56 cm) outside diameter; 20" (50.80 cm) tall
Instrument Pipe Dimensions3.87" (9.83 cm) inside diameter; 48" (121.92 cm) tall
Weight38 lbs. (17.24 kg) no payload; 45 lbs. (20.41 kg) with sonde and solar marine light
Buoyancy40 lbs. (18.14 kg)
Hull MaterialCross-linked polyethylene foam with polyurea coating & stainless steel deck
Hardware Material304 stainless steel
Mooring Attachments1, 2 or 3 point mooring