measuring & Control

Overview on the use of SENECT system components in recirculating aquaculture systems (RAS)
Overview on the use of SENECT system components in recirculating aquaculture systems (RAS)
Application possibilities of SENECT measuring & control architecture
Application possibilities of SENECT measuring & control architecture
aquaculture raceway production facility for salmon and trout equipped with SENECT system components
Example of a recirculating aquacuture production raceway and the corresponding water quality measuring & control architecture.

SENECT measuring & control architecture can fulfill nearly every task in aquaculture systems:


Online monitoring & alarm

SENECT measuring & control units are equipped with an WLAN module and can therefore be embedded in an network. This allows you to control all units remotely for example using your android or iOS mobile phone and receive alarm messages. You also have the possibility to monitor all measurements or actions on your PC and operate the system from your office. Additionally, by using tablet PCs, you can set all the settings conveniently while standing in front of your tanks or pond. Several SENECT control units can be piled together in your software so that you can manage you entire aquaculture system with one programme or app. 


Control of aeration

Long-term stable measurements with the optical O2S oxygen sensor make it possible to switch on the aeration only, when this is necessary. This saves energy and therefore directly reduces operation costs. Additionally, mechanical wear out is reduced and (depending on the aerator type and system) – also the pH effect of aeration (CO2-degassing) is minimized.


Automatic fish feeder control

The SENECT control units are equipped with a powerful fish feeder menu:

  • Different time modes (e.g. at fixed times or in defined intervals)
  • Calibration possible: displaying the feed amount in (kilo)gramm / defining a daily ration
  • Oxygen: No feeding if the oxygen level is too low
  • In combination with oxygen dosing: increase oxygen concentration before the feeding starts
  • Temperature depending feeding (according to the data sheet of your feed supplier)

Oxygen dosing

If pure oxygen is used for the oxygenation, the exact dosing is essential to avoid fish health problems caused by over- or underdosing. The exact addition of oxygen can be controlled by the optical oxygen sensor O2S, solenoid valves and e.g. ceramic diffusors.


Drum filter control

The FILTER|CONTROL and the AQUACULTURE|CONTROL units can be used to control drum or belt filter. With its embedded intelligent control algorithms and reasonable settings, they enable a trouble-free and extreme reliable filter operation. Additionally, unnecessary mechanical wear-out is reduced, water- and energy-consumption minimized and manual maintenance intervals elongated – compared to the typical filter operation.

Some of the functions are:

  • Start of flushing induced by clogging of the filter mesh, compensated for water level changes of the aquaculture system
  • Intensive cleaning programme
  • EcoMode: saving up to 50% of water and energy
  • Intelligent emergency switch-off

Pump monitoring and emergency switch off

The measurement of the water level e.g. with the SENECT water level probe PS can also be used to monitor the hydraulic functioning of your system. With this information, it can be detected, when a pump stopps its operation or if the water level is too low, the pumps can be switched off to avoid damage due to the dry-run.



Ozone reactors need for their optimal operation the control of the ozone addition. By the measurement of the oxidation-reduction potential with the ORP sensor XT-1 this task can be fulfilled with the SENECT control units. Additional protection mechanisms like a maximum duration of the output port lead to a safe operation.


Light control

Simulation of daytime variations and seasons

SENECT Control units













Sensor-input ports 1x 2x 4x

2x Water Level

1x Coverswitch

 3x  6x
Actuator outputs 3x 2x - 2x  2x  5x
High Power 24V outputs - - - 1x  1x  1x
230V Output - - - 3x 3x   3x
Power Supply 60 W 60 W 15 W 150W/300W 150W/300W 150W/300W
Ingress protection IP 54 IP 54 IP 54 IP 54 IP 54 IP 54
Voltage options  230V/24V 230V/24V 230V/24V 230V 230V 230V

SENECT Sensor options

Sensor options for SENECT measuring & control systems
Sensor options for SENECT measuring & control systems



Heinrich Stützel Straße 11

76829 Landau