Seawater Aquaculture Industry Dissolved Oxygen Monitoring Project

Dissolved oxygen refers to molecular oxygen in water, usually recorded as DO, expressed in milligrams of oxygen per liter of water and saturation percentage. The solubility of oxygen in water varies with temperature at a given pressure, and also with pressure at a given temperature. The solubility of oxygen decreases with the increase of salt content, and when the total salt content is below 35g/kg, there is a linear relationship between the two. The dissolved oxygen content of aquaculture needs to be kept within 5~8mg/L. Seawater has a high salt content, so when measuring the dissolved oxygen value, the measured value needs to be corrected according to the salt content. Therefore, usually in the mariculture industry, it is necessary to monitor the salinity value while monitoring the dissolved oxygen.

The dissolved oxygen sensors used in seawater must be corrosion-resistant, so the sensors provided in this set of dissolved oxygen monitoring solutions for the mariculture industry are all made of titanium alloy, which is corrosion-resistant and has a long service life.

Solution 1: OPD700 dissolved oxygen sensor and DEC350 salinity sensor

Features:

Measuring principle of optical fluorescence method
Titanium case, suitable for seawater environments
Protection class IP68, can work continuously underwater
RS485 interface, standard Modbus communication protocol
Compensation for temperature, salinity and pressure
Internal storage of calibration data, plug and play

Specification

Solution 2: MCC100 multi-parameter controller and OPD700 DO sensor, DEC350 salinity sensor

This solution is equipped with a multi-parameter controller, one controller is connected to two sensors, and the controller has two relays and can also be connected to a small PLC to control some equipment. The multiparameter controller also has functions such as history records. RS485 or 4-20mA output can output data, and then use it according to customer needs.

Specification

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