measuring principle:
Online dissolved oxygen detector using fluorescence method to measure dissolved oxygen, the sensor top covered a layer of fluorescent material, when the sensor blue light to the fluorescent material, fluorescent material by red light, because oxygen molecules can take away energy (quenching effect), so the excitation of red light time and intensity and oxygen concentration inversely proportional, by calculating the concentration of dissolved oxygen in the water.
functional characteristics:
The sensor adopts a new oxygen sensitive membrane, with NTC temperature repair function, the measurement results have good repeatability and stability;
No oxygen consumption occurs during measurement, no flow rate / agitation requirements;
Breakthrough fluorescence technology, no membrane and electrolyte, the basic need for maintenance;
Internal self-diagnosis function, to ensure the accuracy of the data;
Factory calibration, one year without calibration, can be on-site calibration;
Digital sensor, strong anti-interference ability, the transmission distance is long;
Standard digital signal output, which can be integrated and networked with other devices without a transmitter;
Sensor site installation is convenient and fast, to achieve plug and play;
Sensor power supply positive and negative electrode reverse connection protection;
The sensor RS485 A / B end is misconnected to the power supply protection.
Typical applications:
DO online monitoring of the regulating tank, biochemical tank and effluent process of sewage treatment plant;
DO online monitoring of water plant, surface water, various industrial production processes, aquaculture and other industries.
|
Sensing technical parameter |
| measuring range |
Dissolved Oxygen：0~20mg/L or o~200% saturation
Temperature: 0-45℃ with automatic temperature compensation |
| measurement accuracy |
Dissolved oxygen: measured value ±3% or ±0.3mg/L, whichever is larger; Temperature: ±0.5℃ |
| repeatability |
±0.3mg/L |
| resolution ratio |
0.01mg/L |
| pressure limit |
≤0.3Mpa |
| calibration |
Automatic air calibration, sample calibration |
| Sensor material |
Body: SUS316L(ordinary version), titanium alloy (seawater version)
Upper and lower cover: PPS+ glass fiber, cable: PUR |
| storage temperature |
-15° C to 60 ° C |
| working temperature |
0 to 45 ° C (no freezing) |
| size |
Diameter 28.7mm* Length 195mm |
| weight |
0.2KG |
| level of protection |
Diameter 49.5mm* Length 251.3mm |
| cable length |
Standard cable length: 10m, extendable 100m |
Controller parameters
| Model |
MDS-KP500 |
| Display |
4.3 inches, 480*800 resolution, 262K color, IPS screen, wide viewing Angle, with backlight |
| |
Capacitive touch screen with three protection processes (moisture-proof, mildew proof, salt spray proof) |
| Display size |
95.0mm*53.9mm |
| Measuring range |
-99999.0000~99999.0000 |
| Password Protection |
The default password is 0000 |
| Compatible sensor |
Digital sensor |
| Mounting method |
Disk mounting (with chassis), wall-mounted mounting |
| Alarm relay |
2 relays can set high and low alarm |
| Current output |
2 isolated 4-20mA, maximum load 750Q, can be set |
| Communication port |
RS485 Modbus RTU |
| Memory backup |
All user Settings are stored indefinitely in EERPOM |
| historical data |
The storage capacity of 8000 points is recorded at a 5-minute interval |
| Operating environment |
-10~+50℃,0~95% relative humidity, no condensation |
| Storage environment |
-20 to +70 ° C,0 to 95% relative humidity, non-condensing |
| The power supply |
12V±10% |
| Power consumption of the instrument |
less than 6W |
| Instrument size |
144X145X85(mm) |
| Protection class |
IP65 |
