The principles and areas of dissolved oxygen meter are briefly introduced

A dissolved oxygen meter is based on the principle
of quenching active fluorescence by a specific substance in physics.

The fluorescent material at the front of the sensor is a special platinum metal porphyrin composite polyester foil that promises the gas molecules to pass through, and the surface is coated with a layer of black insulating material to prevent interference
from sunlight and other fluorescent substances in the water.

It is isolated
by a sapphire light window from the red and blue light source and photosensitive element in the watertight titanium alloy shell.

Dissolved oxygen meters are used for monitoring various process points in sewage treatment plants: including surface water monitoring such as regulation tanks, aeration tanks, aerobic/anaerobic digestion tanks and effluent monitoring
.

The innovative fluorescence method is used to replace the traditional membrane electrode, without replacing the diaphragm and electrolyte, reducing the amount of protection and improving the reliability of the operation, especially in the field of sewage treatment in harsh working conditions
.

In addition, fluorescence sensors do not consume oxygen, so there is no requirement for flow rate and agitation, nor is it disturbed
by substances such as sulfides.

It has the characteristics
of all-Chinese display, Chinese menu-based operation, full intelligence, multi-function, high measurement function, and strong environmental adaptability.

The dissolved oxygen meter has a layer of fluorescent substance, the blue light declared by the LED light source shines on the fluorescent substance, the fluorescent substance is stirred, and the red light is announced; A photocell detects the moment
it takes for a fluorescent substance to return to ground state from emitting red light.

This moment is only related to the emission time of blue light and the amount of oxygen, the probe has another LED light source, which emits red light together in the blue light emission as a reference
for the blue light emission time.

The more oxygen around the sensor, the shorter
the moment when the fluorescent material emits red light.

Dissolved oxygen meter measurement principle: fluorescence dissolved oxygen measuring instrument according to the fluorescence quenching principle
.

Blue light is irradiated on the fluorescent material to arouse the fluorescent material and declare red light, because the oxygen molecules can take away energy (the quenching effect), so the time and intensity of the red light is inversely proportional to the concentration of oxygen molecules
.

After measuring the phase difference between the red light and the reference light, and comparing it with the internal calibration value, the concentration
of oxygen molecules can be calculated.

Typical use of dissolved oxygen meter: municipal sewage and industrial wastewater treatment plant dissolved oxygen monitoring, dissolved oxygen meter is mainly used to ensure that there is sufficient dissolved oxygen in the water treatment process to maintain the activity of microorganisms, and can be manipulated aeration to optimize the use
of energy.

The GLI dissolved oxygen meter is suitable for monitoring
all process points in the sewage treatment plant.

Typical operating environments include regulation tanks, aeration tanks, aerobic/anaerobic digestion tanks and effluent monitoring
.

It can also be used for the determination
of dissolved oxygen in various water bodies such as surface water, sewage and salt water.