by B. Serdar Yildirim, Akuamaks, Turkey

 

When it comes to working with offshore or freshwater (river/pond/dam) cage systems, it's crucial to analyse and log the levels of oxygen and temperature in order to have a strong emergency plan, a good FCR, risk free transport and a healthy stock. The measurement when it's performed manually may not be as efficient and correct for several reasons such as lack of staff, high workload, calibration defects, harsh weather conditions or cable length of the appliance.

Measuring monitoring, and data logging

  • Measures dissolved oxygen, temperature and saturation levels instantaneously
  • In standard equipment, the user can set the alarm limits
  • In "Barge + Cage Model", instant measurement results are transferred to the tablet in Barge from the cages where it's connected by Wi-Fi connection, allowing the staff to monitor the data immediately
  • The results are transmitted to the central server over the Internet connection at intervals of five minutes from the tablet, which is monitored in Barge
  • In cage facilities without barge, if the distance of the measured cages to the land is less than 400 meters and if there is an office with Internet connection on land, the same system can be used.

 

Some needs can't be postponed

We use a system with a direct transmission module in facilities where the cages are located at a distance of 400-metres and where there is no barge. In these types of installations, the fact that they can be connected to the Internet via a mobile phone on those cages to be measured indicates that there is enough signal for data flow. Measurements made in cage five minutes to the central server over the data line at intervals. All measurements are recorded on the central server.

There is a separate file for all systems in the central server. All measurement results can be viewed up-to-date as soon as they are received, as well as recorded. The records can only be accessed by authorised personnel by using a user name and a password. All data can be accessed via tablets, mobile phones and computers anywhere on the globe with Internet connection. The results can be displayed either graphically or as an Excel spread sheet, instantly or by selecting a specific time period.

 

Access current and historical data from anywhere on across the globe

The module, easily assembled with only four bolts in the top of the cage, meets the needs of the battery in the waterproof IP 68 housing, which is supplied with the required solar panel.

Mounting on module, the next generation optical technology probe has a cable length of 15-metres. It can be lowered from the side surface of the cage to the deep side, from the midpoint; it can provide access to the deepness of the level that fishes are fed. Thus, the dissolved oxygen, temperature and saturation measurements at the depth are transferred to instantaneous results.

 

Impeccable measurement without membrane and solution needs new generation optical oxygen probe

In this technology, there is no need for the membrane and solution that are required for the galvanic probes. As with galvanic probes, there is no risk of calibration deviation due to membrane puncture and solution depletion, which means there is no false measurement risk.

Optical probes are very durable and have no feed for frequent calibrations as is the case with galvanic probes. They have a technology that makes accurate measurements. Visual checks can be performed through the protective cover; the probes can be used safely and can be cleaned even by wiping with a finger.

Optional equipment

  • Dissolved oxygen probe 15-m cable length (standard)
  • Temperature (standard)
  • Saturation (standard)
  • pH probe (optional)
  • Salinity probe (optional)
  • Turbidity probe (optional)
  • Chlorophyll-A (optional)
  • GPS (optional)
  • Cable length longer than 15-m (optional)
  • Buoy (optional)

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