Doppler Pellet Sensor

Intelligent pellet sensor with built-in camera...

Correct feeding is key to achieving good fish farming results. The Akvasmart Doppler Pellet Sensor allows for feeding the fish to satiation automatically. Both the feed rate and feed amount are adapted to fish appetite. This ensures that the fish get the correct amount of feed, at the right rate and at the right time. This sensor is installed below the fish' main eating area in the cages and uses our patented Doppler technology to detect uneaten pellets. It has a built-in video camera for visual control and calibration of the Doppler.

The system is fully integrated with the AkvaMarina CCS Feed System so that all settings and camera control are done through the AkvaControl software. The Doppler Pellet Sensor connects to the wireless sensor network via the CSU (Cage Sensor Unit).

Doppler Pellet Sensor
Sensing area - H x Ø:	2,5m x Ø 2,5m (8' x 8' diam.) vertical cone shaped area
Normal installation position:	Below the main eating area in the cages (typ. at 5-10m / 16-32' depth)
Operating temperature range:	-2ºC to +40ºC (+28ºF to +104ºF)
Sensing method:	Acoustics (Doppler effect)
Cable:	30m (100') polyurethane (otional: 40m (130')
Connection plug:	Amphenol 7-pin waterproof and potted
Max depth:	40m (130') limited by cable
Size - L x Ø:	570mm / Ø 90mm (22.5" / 3.5" diam.)
Weight:	7,4 kg (16,3 lbs.) incl. cable and sinc anode

The Doppler is suspended underneath the main eating area of the fish and detects uneaten pellets sinking towards the sensor.

The sensor regulates the feeding based on amount of uneaten pellets passing the sensing area of the Doppler.

The built-in video camera looks straight up towards the surface during the feeding order to see uneaten pellets.

The sensor is integrated with the CCS Feed System via a wireless network. This provides unparalleled control of the feeding.

Connected to environmental sensors, the system reduces feed waste as the feeding is also stopped at low appetite, low oxygen and/or strong currents.