产品介绍
The fluorescence dissolved oxygen instrument is based on the quenching principle of specific substances in the physics of active fluorescence.The modulated green light shines on the fluorescent material is actviated and then emit red light,the oxygen molecule can take away the energy (quenching effect),so that the time and intensity of the red light is inversely proportional.We used red light and green light synchronization as a reference, the difference between tested activation red light and the reference light ,and compared with the internal calibration value to calculate the concentration of molecular oxygen, and the final output value is compensated by temperature.Dissolved oxygen (DO) is an indicator of water purification capacity. The dissolved oxygen content is higher which indicates strong ability for water self purification.Conversely, pollutants in water bodies are not easily oxidized and decomposed,anaerobic bacteria will reproduce in large quantities and smelly water .It’s widely used in industry, agriculture, scientific research, environmental protection and other fields.
二、Characteristics
Small amount of maintenance in fluorescence quenching principle.
No oxygen consumption, no velocity and agitation required.
Free from chemicals such as sulfides.
High resolution and measurement accuracy.
Sensor automatic identification.
Keypad operation is simple.
4~20mA Isolated current output
Higher and lower limitation for alarm relay output.
With full intelligence, multi-function, high performance and environmental adaptability.
三、Technical Specification
Ø Test performance
Range：0~20mg/L
air saturation0~200%
Accuracy：±0.1mg/L
Resolution：0.01 mg/L
Response Time：30s
Calibration:Two-point calibration,field calibration available
Temperature compensation: automatic temperature compensation
Display:LCD screen dispaly ,multi parameter same screen display.
Ø Signal output
Analog output:4 ~ 20mA (four wire system), maximum load 750W
Switch output:2 programmable relays can be set alarm and timer function.
：AC230V，5A
Relay capacity:AC230V，5A
Ø Power Supply
AC220V±10%，50Hz（DC 24V）
Power supply:AC220V±10%，50Hz（DC 24V optional）
Ø Physical performance
：ABS
Material:Transmitter: ABS
Sensor: 316 cover / fluorescent polyester cap
Process connection:G1 pipe thread
Assembling method:Bracket type
Cable length:10M(length extending allowable)
Ø Surrounding Performance
Protection level:transmitter IP65
Sensor IP68
Working temperature:
transmitter -20~55℃
Sensor 0~60℃
Humidity:Relative humidity ≤85%
Process pressure:≤0.3MPa
四、Application
Sewage plant: water testing for regulating reservoir, aeration tank, aerobic / anaerobic digestion tank and factory water etc.Industrial process: monitoring of water quality such as production water and circulating water.Environment testing for rivers, lakes, sea water, fishing grounds, aquaculture and other water environment.
