Modular Free-fall Lander System

Deep-Sea Measuring Chamber

Control Boards

Sampling Device

Deep-Sea-Stirrer

Measuring Buoy

Modular Free-fall Lander System

     Technical description

Height:	approx. 2500 mm
Diameter:	approx. 2500 mm
Weight of framework in air:	approx. 600 kg

     Design

The tripod-framework (see fig.) as the central part is made from stainless steel and can easily be mounted and dismantled into its components for small transport and storage volume. It can carry:

• Benthic Chambers
• Currentmeters
• Still Camera Systems
• Video Cameras
• Watersampler

The total lander system consists of:

• up to 21 17" Glass Flotation Spheres (type on customers request)
• the tandem release system with two parallel mounted Acoustic-Release-Transponder (type of customers request)
• a 0.9 x 0.9m platform for the measurement equipment capable for up to 4 units
• the steel ballast weights for variable descent speed, (regular descent speed 60m/min.)
• a radiotransmitter and a flashlight to find the lander back at the sea-surface after release. Optional a GPS-Transmitter can be installed.

Module 1:

Tripod-framework with holds for flash, radio beacon,

tandem release transponder, and a maximum of 21 17" buoyancy glass spheres and working platform 0.9x0.9m.

Module 2:

1 Measuring unit including 2 deep-sea engines,

2 lead screws, both made from stainless steel.

1 temperature sensor and a mixer, both made from titanium.

1 Power unit NiCd 14.4V/4AH

1 Set of underwater cable to connect the sensor, the power unit and the data logger.

Module 3:

Programmable control unit including pressure house, control board and stabilised DC power supply unit for sensors and data logger system.

Extra ballast weight set

Deep-Sea Measuring Chamber

1 Measuring unit including two deep-sea engines, two lead screws, both made from stainless steel. One power unit NiCd 14.4V/4AH. The chamber can be equipped with sensors and further equipment according to our customers requests.

Control Boards

Programmable control unit including pressure house, control board and stabilised DC power supply unit for sensors and data logger system.

Sampling Device

Syringe sampler with 8 syringes or plastic bags to take liquid samples including an engine and cable for the connection with the power supply. Depth rate: max. 6000 meter.

Deep-Sea-Stirrer

Mixer made from titanium to be used in e.g. underwater measuring chambers.

Technical Data

     Capability

Depth-Rate:	6,000 m max.
Operating Temperature:	-10°C to +50°C
Storage Temperature:	-30°C to +70°C

     Mechanical

Housing Material:	Stainless Steel 306T (1.4571), Titan
Stirrer Head:	POM (standard), different Stirrer-Types possible
Stirrer Speed:	30 rpm to 90 rpm
Outer Diameter:	25 mm
Length without Connector:	95 mm
Weight in Air:	250 g
Weight in Water:	200 g

     Electrical

Connector:	SUBCONN MC BH 2M SS (standard)
Pin-out:	1 = GND, 2 = +UB
Voltage:	1,5V DC to 6V DC (standard)
Current:	10 mA to30 mA

Measuring Buoy

Drifting or moored buoy with independent power supply. Measuring components according to our customers requests. On board data storage or online data transfer possible.