Xi'an Kacise Optronics Co.,Ltd. |
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KFDO900 compact dissolved oxygen meter water quality for
aquaculture PVC material sensor
Product Introduction
The fluorescence method dissolved oxygen meter KFDO900 adopts the
innovative fluorescence method to replace the traditional membrane
electrode without replacing the membrane and electrolyte, thus
reducing the maintenance workload and improving the working
reliability, especially suitable for the harsh working conditions
in the field of sewage treatment.In addition, the fluorescence
sensor does not consume oxygen, so there is no flow rate and
agitation, and it is not subject to the interference of substances
such as sulfide.
Principle Brief
Fluorescence method oxygen dissolved meter is based on the
quenching principle of specific substances to active fluorescence
in physics.Figure 1-2 is the schematic diagram of the sensor's
work. The fluorescent substance at the front of the sensor is a
special platinum porphyrin composite with polyester foil allowing
gas molecules to pass through, and the surface is coated with a
layer of black light-proof material to avoid interference from
sunlight and other fluorescent substances in the water.
The modulated blue light shines on the fluorescent material and
causes it to excite and emit red light. Since oxygen molecules can
carry away energy (quenching effect), the time and intensity of red
light excitation are inversely proportional to the concentration of
oxygen molecules.We used the red light source synchronized with
blue light as the reference, measured the phase difference between
the excited red light and the reference light, and compared it with
the internal calibration value, so as to calculate the
concentration of oxygen molecules, and output the final value
through temperature compensation.
Performance characteristics:
● Innovative fluorescence principle, no need to replace the
diaphragm and electrolyte, basic maintenance free;
● No need to replace the fluorescent cap, lower use cost;
● No oxygen consumption, no flow rate and agitation requirements;
● will not be "toxic" because of sulfide, to overcome environmental
interference;
● Free from cross interference of H2S, PH, CO2, NH3, SO4, CL-, CL2,
etc.
● Higher resolution and measurement accuracy;
● The service life of the sensor is up to 5 years;
Technical Parameters of Fluorescence Dissolved Oxygen Analyzer
Class | Performance | Parameter |
Transmitter | Size | 230×185×120mm |
Weight | 1.5kg | |
Storage Temperature | -40-60℃ | |
Temperature | -20-60℃ Avoid direct sunlight | |
Relative humidity | 5%~85% (no condensation) | |
Supply | 220VAC±10%,50Hz | |
Analog output | 4~20mA output or 0~20mA output (dissolved oxygen value or saturation), loop load maximum 750 ohms;Optional temperature 4~20mA output | |
The relay outputs | 3 relays with A capacity of 220 VAC/ 2 A. The outputs can be set for alarm or timing functions | |
Protective grade | polycarbonate enclosure, IP65 | |
Field display | LCD display with backlit | |
Digital interface | RS232 or RS485 interface, Modbus protocol can be supported. | |
Sensor | Measurement range | dissolved oxygen: 0.00~20.00mg/ L or 0.00~20.00 PPM air saturation: 0~200% |
Resolution | 0.01mg/L | |
The measurement accuracy | ±1%FS or ±0.15mg/L with the largest value | |
Repeatability | ≤0.2mg/L | |
Response time | less than 60 seconds | |
Temperature sensor | Working range: 0~60°C;Resolution: 0.01°C Accuracy: ±0.5°C;Response time: less than 10 seconds | |
Storage temperature | -20°C ~60°C | |
Ambient temperature | -20°C ~60°C | |
Medium temperature | 0℃~50℃ | |
Maximum mounting depth | 10 m | |
Chemically adaptation | methanol and ethanol are safe to avoid other organic solvents | |
Calibratation | Anoxic water and air were used for calibration respectively.It has been calibrated before leaving the factory, and generally there is no need to calibrate. | |
Anti-interferense | It is not subject to cross interference of H2S, PH, CO2, NH3, SO4, CL-, CL2, CLO2, MeOH, EtOH, and various other ions. | |
Foil | Polyester embedded with platinum porphyrin fluorescence | |
Light-proof coating | teflon | |
Foil life | up to 5 years (10 second measurement interval) | |
Sensor shell size | 45 x 100 Φ | |
Weight | 1.2 kg | |
Cable standard | 10 meters | |
Sensor shell | stainless steel |
Ordering Information selection table
Ordering Information selection table | ||||
KFDO900 | Fluorescence Dissolved Oxygen Meter | |||
Power supply | ||||
DC24V | ||||
AC220V | ||||
Cable length | ||||
10m | ||||
15m | ||||
20m | ||||
30m | ||||
Signal output | ||||
Only 4-20mA | ||||
Only 485 | ||||
Also with 4-20mA , 485 signal output
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Special custom signal | ||||
KFDO900- | AC220V | 10m | Only 485 | with AC220V adapter, cable between host and sensor,The cable length
is 10 meters, the sensor is equipped without temperature
compensation, and is equipped with only 485 communication signal
output.
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Contact us
Website: www.kacise.com
Phone: +86-17719566736
Email: sales@kacise.com
Location: Tangyan South Road, High-tech Zone, Xi'an City, Shaanxi
Province, China