Prodotto

Navis BGCi

Sea-Bird Electronics

A Navis autonomous profiling float with integrated optical Dissolved Oxygen sensor (SBE 63) and WET Labs MCOMS is now available from Sea-Bird Scientific. The sensors take continuous measurements at 1 Hz through ascent, and provide high accuracy, resolution, and stability.

The SBE 41N CTD measures conductivity, temperature, and pressure (depth). The pump-controlled, T-C ducted flow minimizes salinity spiking caused by mismatch of temperature and conductivity measurements.

The individually calibrated SBE 63 Optical Dissolved Oxygen sensor is integrated within the CTD flow path, providing optimum correlation with CTD measurements.

The MCOMS is three optical sensors in one, providing chlorophyll a, backscattering, and CDOM. The MCOMS is integrated directly into the float end cap and co-located with DO and physical measurements.

The carefully engineered anti-foul protection includes anti-foulant devices, a U-shaped flow path, and an integral pump. On the float’s ascent, as it approaches 10 to 5 dbars beneath the ocean surface, the pump turns off. The U-shaped flow path prevents sea surface oils and contaminants from being ingested while proceeding through the ocean surface skin and sitting at the surface during data transmittal. Between profiles the pump is off. The U-shaped flow path prevents water flow through the system caused by waves or currents; minute amounts of anti-foulant concentrate inside the conductivity cell to minimize bio-fouling.

As an option, multiple sensors can be attached to the float hull and cabled to the end cap. Data from all sensors, including the optional bolt-on sensors, is integrated in the data stream by the SBE 41N CTD electronics. Currently available bolt-on sensors include the Satlantic Deep SUNA (nitrate), Satlantic OCR 504 (4-channel radiometer), and WET Labs C-Rover 2000 (transmissometer); check this datasheet for updates.