DRIFTER SC-40

nke Instrumentation develops, manufactures and sells drifted buoys in order to monitor the current at sea surface for oceanographic studies and also the oil spill trajectories. The drifters can be fitted with holey socks drogue and are by this way linked to a particular mass of water. The drag ratio between surface buoy and the drogue validates the good function of current follower. The SC40 buoy can support several sensors such as a Sea Surface Temperature sensor (SST), a Barometric Pressure sensor, a Drogue Presence sensor, a High Resolution Sea Surface Temperature sensor (HRSST) or a Probe sensor Conductivity/Temperature (CT).

SC40: SVP drifter

Description - The SC40 drifters are used mostly in offshore in order to monitor the current at sea surface for oceanographic studies and also the oil spill trajectories. The drifters can be fitted with holey socks drogue and are linked to a particular mass of water. The drag ratio between surface buoy and the drogue validates the good function of current follower. If no drogue is mounted, the drifter is affected by the surface current.

The SC40 buoy is a sphere of 400 mm diameter, molded in plastic at high pressure. The SC40 is equipped with low radar echo in order to reduce the risk to be picked up by fishermen and it is fitted with lashing rings.

The SC40 drifters are designed to monitor seawater current flow at sea surface, oil spill trajectories and has to be equipped with a drogue to not be affected by the surface current.

NKE Instrumentation proposes 3 models:

 SC40 A: data are collected by Argos satellites, position is achieved by Doppler effect computed by CLS

 SC40 AG: data are collected by Argos satellites, position is acquired by a GPS receiver and transmitted via Argos

 SC40 IG: data are collected by Iridium satellites, position is acquired by a GPS receiver and transmitted via Iridium

Features and benefits

Very simple to use

In option “holey socks drogue” and various length of line

Easy BT connection for parameters setting

Lithium and alkaline battery solututions

40 cm diameter spherical buoy

Sea Surface Temperature Sensor (SST)

Barometric Pressure sensor

Drogue presence sensor

IRIDIUM satellite

Technical data

Sea surface temperature:

Accuracy: +/-0.1°C with calibration

Range: -2°C +35°C

Temperature sensor position: -15 cm

Drogue indicator: submergence switch

Drogue: in compliance with DBCP drag ratio >40

Drogue (option): holey socks 0.8 m lenghth 6 meters

Line (option): 12.5 meters including elastic seection other length on request

Battery & autonomy:

Technology: lithium or alkaline according to request

Capacity: 50 Ah

Autonomy: Accprding to parameter settings, typically > 6 months

Environmental features:

Operating temperature: -20°C to +50°C

Storage temperature: -10°C to +25°C for optimum battery shelf life

Water tightness: 10 dbars

Mechanical features:

Shape: spherical drifter

Dimensions and weight: diameter 390 mm volume 31 litters weight 10 kg

Material ad color: injected polypropylene grey

Mooring: 8 lashing rings diameter 10 mm

SC40 SVP-BSC: Sea surface temperature, conductivity and salinity measurement

Description - The SC40 SVP - BSC drifting buoy is equipped with a GPS receiver, a sea surface temperature sensor, a barometric pressure sensor, a conductivity / temperature datalogger and the data are transmitted via Iridium.