Aanderaa SeaGuard O2 Recorder

The Andra Ocean Guardian O2 Recorder is a sturdy, durable, and powerful O2 recorder developed based on the Ocean Guardian platform. It can be used for self capacitance measurement of O2 concentration. At the same time, the instrument can also serve as a platform extension to add other measurement parameters such as CTD, ocean currents, turbidity, waves, and tides

>Characteristics

·High resolution, low drift

·Low maintenance volume

·Principles of Optical Measurement

·Long term stability

·No calibration required for over a year

·The measurement interval can be selected from 2 seconds to 2 hours

·SeaGuard Studio visualization software

·Intelligent sensor based on CANbus interface

·Can be used for both seawater and freshwater

Dissolved oxygen is the most important measurement parameter in the biochemical processes of aquatic environments, and is also commonly used as a tracer in marine research. For hypoxic environments, monitoring dissolved oxygen is crucial, such as:

·Shallow water areas with algal blooms near the coast

·Fjords or other areas with less water exchange

·Aquaculture

·Areas where mining or dredging waste is dumped

The Andra dissolved oxygen probe is based on the fluorescence quenching measurement principle of the lifecycle. It uses platinum porphyrin complexes as fluorescent materials embedded in breathable fluorescent materials

In the membrane, a black light isolation coating protects the fluorescent material from the effects of sunlight and particle fluorescence in water. One side of the fluorescent film is exposed to environmental water, and the other

One side is installed on the optical window of the measurement room. The fluorescence quenching measurement principle based on the lifecycle has the following advantages compared to electrochemical sensors:

·The impact of disturbance is relatively small (does not consume oxygen)

·Less affected by pollution

·Measuring the absolute concentration of dissolved oxygen does not require frequent calibration

·Better long-term stability

·Less affected by pressure

·The impact of pressure is predictable

·Faster response time

The Ocean Guardian O2 recorder can collect data through Andra real-time data acquisition software, and the output parameters can be displayed and processed through SeaGuard Studio software. The sensor is an intelligent sensor that is plug and play and can automatically recognize.