Alvestad

Alvestad Marin is a leading supplier of products and system solutions to the fish farming business. AM has developed, patented and commercialised unique solutions for the production of fry. The company’s main focus is on innovative solutions for hatcheries and water Recirculation. The company’s products are currently leading within these areas in all the salmon producing countries and the company has a subsidiary in Chile.

Products

• KUBE^®start

• KUBE^®hatch

• EasyHatch^®

• CompHatch^®

• FeedFlow^®

• DPF^®

News

11.20.2010
KUBE^® 8000
Marine Harvest uses KUBE^® 8000.

06.03.2010
Plug and play
Read about KUBE on Kyst.no

05.08.2010
Raportage Norwegian fish farming
Marin Harvest tests RAS

05.07.2010
Presentation of KUBE^®
Steinsvik, May 27th.

Read more news here

Feed spill is costly Feeding in strong currents means that many particle of feed will drift out of the facility without being eaten. When there is no current, the appetite normally gets weaker and this results in low exploitation of the feed. Feeding adapted to the prevailing local ocean current conditions will exploit the feed to a maximum.

FeedFlow^® is a simple, robust and dependable pendulum current meter which gives continuous information about the current in the facility and stops waste of feed caused by feeding at too high or low velocity. The pendulum has low sensitivity for fouling, has no moving components or sensors, and it can easily be connected to all types of feeding apparatus.

FeedFlow^®

Figure 1

Manner of operation FeedFlow^® is suspended from a flexible cable from a fixing point in the fish farm facility. The instrument measures the force of the current by exploiting the current's pulling force. When there is no current, the instrument will only be influenced by the power of gravity and thus it will hang perpendicularly. When the current increases, the flow will create a horizontally directed pulling force which will pull the instrument at an angle ø away from the perpendicular (figure 1). A built-in control system will measure the angle and calculate the velocity of the current v on the basis of a pre-entered calibration curve. Finally, a real time current velocity is presented in the form of a 4-20 mA electric current circuit signal.

Mechanical construction. The main features of the mechanical construction of the instrument. The instrument consists of a cylinder with 4 pull amplifying, longitudinal fins that is suspended in a flexible cord. The instrument’s total current pull compared to its weight in water determines its sensitivity and measuring range.

FeedFlow^®product sheet

Electronic construction The instrument’s electronics has been mounted on a circular sensory card which contains a two axes angle meter and a computer processor. The angle signals are transmitted to the processor which continuously calculates the angel ø independently of the direction of the slope. Afterwards, the processor transmits a 4-20 mA current circuit generator and a 9600 baud RS-232 generator. The RS-232 generator presents the angle of inclination ø in ASCII format with an update frequency of about 1 second.