Aanderaa dissolved oxygen sensor 4531

FEATURES

·Principle of Optical Fluorescence Quenching Measurement Based on Life Cycle

·Long term stability

·No calibration required for over a year

·Low maintenance volume

·Intelligent sensors that directly output calibrated data

·Can be used independently

·Output format: 4~20mA, 0~5V, 0~10V, RS232

·Cable length can be customized

Dissolved oxygen plays an important role in biochemical processes and process industries in water environments, and is a crucial measurement parameter in various fields, such as:

·Process industry

·Water and wastewater system

·Ship engine room

·Ship ballast water

·Fjords or other areas with less water exchange

·Aquaculture

The Andra dissolved oxygen probe is based on the fluorescence quenching measurement principle of the lifecycle. It uses platinum porphyrin complex as the fluorescent material, embedded in a breathable fluorescent film, and a black light isolation coating protects the fluorescent material from the influence of sunlight and particle fluorescence in water. One side of the fluorescent film is exposed to the environmental water, and the other side is installed on the optical window of the measurement room. By exciting the fluorescent material on the fluorescent film with blue light, it emits red light. The detector detects the time from the emission of blue light to the release of red light, which is linearly correlated with the dissolved oxygen concentration. After temperature compensation, the dissolved oxygen concentration is obtained. 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

·Not affected by pressure

·Faster response time

Aanderaa dissolved oxygen sensor 4531