Dissolved oxygen sensor

1. Working principle of dissolved oxygen sensor

The unique optical detection method of the dissolved oxygen sensor measurement probe can effectively measure the molecular oxygen dissolved in the water, and can eliminate the interference of pH fluctuations, ammonia nitrogen and other chemical substances or heavy metals in the water, thereby providing a more stable solution over a longer period of time. , more accurate measurement results. The fluorescence dissolved oxygen sensor is designed based on the quenching principle of excited fluorescence by specific substances in physics. When the excitation light shines on the fluorescent substance on the surface of the fluorescent membrane head, the fluorescent substance is excited and emits fluorescence. The extinguishing time of the fluorescence is affected by the concentration of oxygen molecules on the surface of the fluorescent membrane head. The concentration of oxygen molecules can be calculated by detecting the luminescence lifetime of the fluorescence, and the final value is output after temperature, air pressure and salinity compensation.

2. Dissolved oxygen sensor product features

No electrolyte is required and there is no polarization problem with the electrodes

No oxygen consumption, not affected by flow rate

Automatic temperature compensation

Not affected by chemical substances such as sulfides

Fast response and high accuracy

3. Dissolved oxygen sensor product size chart

4. Technical parameters of dissolved oxygen sensor