Name: Online fluorescence method for dissolved oxygen
Brand: Kunshan BoFeng Automation Technology Co., Ltd
Availability: InStock

Room 1606, AVIC International Building, No. 579 Qianjin East Road, Kunshan Development Zone, Jiangsu Province

Fluorescence method for dissolved oxygen

The fluorescence based dissolved oxygen analyzer is based on the quenching principle of specific substances on active fluorescence in physics. The modulated green light shines on the fluorescent substance to excite it and emit red light. Due to the quenching effect, oxygen molecules can take away energy, so the time and intensity of exciting red light are inversely proportional to the concentration of oxygen molecules. We used a red light source synchronized with green light as a reference, measured the phase difference between the excitation red light and the reference light, and compared it with the internal calibration value to calculate the concentration of oxygen molecules, and output the final value after temperature compensation. Dissolved oxygen (DO) is an indicator for evaluating the self purification capacity of water bodies. A high dissolved oxygen content indicates a strong self purification ability of the water body; On the contrary, it means that pollutants in the water are not easily oxidized and decomposed, and anaerobic bacteria will multiply in large numbers, causing the water quality to become foul smelling. Widely used in industries, agriculture, scientific research, environmental protection, and other fields.

Ø Performance characteristics

·The principle of fluorescence quenching requires minimal maintenance;

·No oxygen consumption, no requirements for flow rate and agitation;

·Not affected by chemical substances such as sulfides;

·High resolution and measurement accuracy;

·The sensor is plug and play and automatically recognizes;

·Easy button operation;

·4~20mA isolated current output;

·Upper and lower limit alarm relay output;

·Fully intelligent, multifunctional, high measurement performance, and strong environmental adaptability.

Ø Application Fields

Sewage treatment plant: regulating tank, aeration tank, aerobic/anaerobic digestion tank, and effluent testing, etc.

Industrial processes: water quality monitoring of production water, circulating water, etc.

Water environment testing for rivers, lakes, seawater, fishing grounds, and aquaculture.

Ø Test performance

Measurement range: 0-20mg/L

Air saturation ranging from 0% to 200%

Accuracy: ± 0.1mg/L

Resolution: 0.01 mg/L

Response time: 30s

Calibration: two-point calibration, can be calibrated on site

Temperature compensation: automatic temperature compensation

Display: LCD display, multi parameter display on the same screen

Ø Signal output

Analog output: 4-20mA (four wire system), high load 750W

Switch output: 2 sets of programmable relays that can be set as alarm functions

And timing function

Relay capacity: AC230V, 5A

Ø Power supply

Power supply: AC220V ± 10%, 50Hz (optional DC 24V)

Ø 物理性能

Material: Transmitter: ABS

Sensor: The casing is made of 316 and the fluorescent cap is made of polyester

Process connection: G1 pipe thread

Installation method: bracket insertion type

Cable length: 10 meters standard (extendable)

Ø Environmental performance

Protection level: transmitter IP65

Sensor IP68

Working temperature: transmitter -20~55 ℃

Sensor 0~60 ℃

Environmental humidity: Relative humidity ≤ 85%

Process pressure: ≤ 0.3MPa