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Products

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Solutions

About us

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2500

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Vislift UP

The Vislift UP enables fish migration in two directions where a barrier between two water table areas blocks the swimming route. The application area focuses mainly on locations near a polder outlet pumping station. The Vislift UP has a round shape, works according to the sluice principle and creates a continuous lure flow on the side of both water catchment areas.

Proven effective for almost all fish species

Based on real-time data, it can be demonstrated that the Vislift is effective for almost all fish species.

24/7 real-time data of fish and water

The built-in sensors monitor passing fish on quantity and species, and the water on water levels, water temperature, flow rate, pollution and blockages. Ecologists, water and level managers gain more insight into fish migration and the parameters of the water.

Automatic water management

Fish species migrate at different times under different conditions, with flow velocity in the fish passage being the most important parameter. The Vislift has a flow technique that controls the attraction flow rate of the fish passage.

Self-cleaning

The Vislift is self-cleaning: the device is periodically rinsed. The built-in sensors also detect blockages. When the cleaning cycle does not yield sufficient results, this is recognized and communicated to the user.

Plug-and-play in 48 hours

The Vislift is compact, structurally strong and almost universally applicable due to its patented round shape. Soil investigation and structural calculations are less relevant. This makes the installation of the Vislift many times more efficient and faster than traditional solutions. The Vislift can be installed and reinstalled at any location within 48 hours.

Also for polder - basin migration

The fish passage can be applied everywhere; even in places with little space and even for polder boezem migration. For this situation, a Vislift UP can be used.

24/7 Remote functionality

The fish passage can open and close

Adjustable pilot flow rate

Adjustable water saving in dry periods

Periodic cleaning cycle

Water parameters 24/7

  • Water levels

  • Flow rate

  • Temperature (°C)

Fish migration measurements 24/7

  • Fish movements

  • Fish species

Benefits Vislift UP

The unique shape of the basins, the dimensions of the swim gates, and the spacious central rest chamber ensure that the energy dissipation remains below 100 W/m3. This energy dissipation mainly occurs next to the swimming lines, allowing a wide variety of fish species to use the Vislift to swim past a barrier.


The processing flow rate varies from 25 to 45 l/s and can be expanded with an internal bypass that increases the attraction flow rate to 70 l/s. If the waterway is larger, the Vislift is equipped with an external bypass, increasing the detectability of the attraction flow.


In extremely dry periods, the water-saving function can reduce the minimal flow rate (per 24 hours) by allowing the Vislift to operate for only a few hours per day.


The Vislift is suitable for almost all fish species found in the Netherlands. The attraction flow rate within the fish passage is adjustable, self-regulating, and can be tailored to the migrating fish species' season and the fluctuating water level. This ultimately determines the migration efficiency.

Vislift UP 1500

Vislift for polder migration max gradient 1500mm

Specifications

Volume Vislift in operation

approx. 13000 liters (at a level difference of 1.5m)

Connection value

3FN/25A, equipped with automatic transmission

Monitoring wells

3 pieces, (diameter 110mm) for level sensors and water quality sensor

Swimming compartments

3 pieces, gathering spaces for autumn and spring migration directions

Spindle motor

2 pieces, operate 4 pieces of spindle slides for lock operation

Dish rack

For pilot stream pump, to keep large waste away from the pump is automatically cleaned

Automatic

cleaning system

Daily program to flush the Vislift

Fish counter with camera

Digital camera with lighting in waterproof housing equipped with automatic clean cycle (if automated version)

Waterparameters

For continuous measurement of water parameters:


  • Temperature

  • Water levels

  • Flow rate

Pilot current flow

Vis-safe screened pump standard equipped with maximum flow rate 250 m3/hour

Vislift UP 2000

Vislift for polder migration max gradient 2000mm

Specifications

Volume Vislift in operation

approx. 15500 liters (at a level difference of 2m)

Connection value

3FN/25A, equipped with automatic transmission

Monitoring wells

3 pieces, (diameter 110mm) for level sensors and water quality sensor

Swimming compartments

3 pieces, collection spaces for autumn and spring migration directions

Spindle motor

2 pieces, operate 4 pieces of spindle valves for lock operation

Dish rack

For pilot flow pump, to prevent large debris from the pump being automatically cleaned

Automatic

cleaning system

Daily program to flush the Vislift

Fish counter with camera

Digital camera with lighting in waterproof housing equipped with automatic clean cycle (if automated version)

Water parameters

For continuous measurement of water parameters:


  • Temperature

  • Water levels

  • Flow rate

Pilot flow rate

Visually safe screened pump standard executed with maximum flow rate 250 m3/hour

Vislift UP 2500

Vislift for polder migration max gradient 2500mm

Specifications

Volume Vislift in operation

approx. 18000 liters (at a level difference of 2.5m)

Connection value

3FN/25A, equipped with automatic transmission

Monitoring wells

3 pieces, (diameter 110mm) for level sensors and water quality sensor

Swimming compartments

3 pieces, collection spaces for autumn and spring migration directions

Spindle motor

2 pieces, operate 4 pieces of spindle valves for lock operation

Dish rack

For pilot flow pump, to prevent large debris from the pump being automatically cleaned

Automatic

cleaning system

Daily program to flush the Vislift

Fish counter with camera

Digital camera with lighting in waterproof housing equipped with automatic clean cycle (if automated version)

Water parameters

For continuous measurement of water parameters:


  • Temperature

  • Water levels

  • Flow rate

Pilot flow rate

Visually safe screened pump standard executed with maximum flow rate 250 m3/hour

Vislift UP 3000

Vislift for polder migration max gradient 3000mm

Specifications

Volume Vislift in operation

approx. 20500 liters (at a level difference of 3m)

Connection value

3FN/25A, equipped with automatic transmission

Monitoring wells

3 pieces, (diameter 110mm) for level sensors and water quality sensor

Swimming compartments

3 pieces, collection spaces for autumn and spring migration directions

Spindle motor

2 pieces, operate 4 pieces of spindle valves for lock operation

Dish rack

For pilot flow pump, to prevent large debris from the pump being automatically cleaned

Automatic

cleaning system

Daily program to flush the Vislift

Fish counter with camera

Digital camera with lighting in waterproof housing equipped with automatic clean cycle (if automated version)

Water parameters

For continuous measurement of water parameters:


  • Temperature

  • Water levels

  • Flow rate

Pilot flow rate

Visually safe screened pump standard executed with maximum flow rate 250 m3/hour

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