STUN TUBE :

The Stun Tube consists of two main parts: the entrance and the stun field. The entrance has been designed to allow fish rapid entry into the stun tube itself. They fall directly into the stun field and are rendered unconscious immediately. The stun field is provided by a pair of electrodes embedded within the stun tube which is filled with re-circulating water from the pump The stun tube also incorporates a pair of sensors which independently monitor the stun field to ensure correct stunning at all times. The length and diameter of the stun tube depends upon the size of the fish to be stunned. In the case of Atlantic Salmon the HS2 is 12" in diameter and the length is nearly 3m.

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THE MAINTENANCE TUBE

The Maintenance pipe is a flexible polyurethane pipe which connects the Stun Tube and the Dewatering tank. It incorporates an electrode which provides the maintenance field. Although the fish are travelling quickly when they enter the Stun tube the recycled water slows them down. By the time they reach the Maintenance field the fish are travelling at a speed that ensures they remain in this tube for the required treatment time. Being a flexible pipe the system can be arranged in a number of ways to suit the customer.

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CONTROL ELECTRONICS

The electronics is completely automatic. It communicates with the operator via coloured beacons and a 20x4 LCD display. Once commanded to operate the system will fill itself with water, add salt to condition its conductivity and advise the operator when it is ready to stun fish. It continually monitors the voltages and currents flowing in the system. Using this data it adjusts the voltage to deliver a humane stunning field at all times. The electronics also monitors the water and salt levels within the system and adds fresh or salt water to maintain optimum stunning. The display is comprehensive but also intuitive - allowing understanding of the system with minimal training.

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DEWATERING TANK

The De-watering Tank has a number of functions: it is the reservoir for the recycled water, it separates the fish from the water, it incorporates a number of sensors for the electronics and contains the solenoids which the microprocessor uses to fill the machine and condition the water. The Maintenance pipe can enter the de-watering tank either from the left or right to add flexibility to the system foot-print. A fast release coupling at the base of the tank provides the inlet to the water pump.

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PUMP

Ace Aquatec do not provide the water pump which is the only moving part of the system that is essential for its operation. The size and capacity of the pump depends on the model of HS2. 6" and 8" models can be driven by a 2" water pump of 600 litres per minute. The 12" model requires a 3" water pump of between 1,300 to 1,500 litres per minute.

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