Online dissolved oxygen detector

1.Online dissolved oxygen detectorcontroller parameters

The online dissolved oxygen detector is a device used to monitor the dissolved oxygen content in water in real time. It can help us better understand the dissolved oxygen in water and provide important information for water quality monitoring and ecological protection.

Product size: Instrument appearance size: 96*96*110mm; opening size: 92*92mm.

Power consumption: DC24V≤1.6w; AC220V≤15w

Power supply voltage: DC24V/AC220V optional before leaving the factory.

Protection level: IP54

Instrument weight: controller ≤0.6kg.

Working conditions: Ambient temperature: -20~60℃ Relative humidity: <85%.

Overall appearance: 128*64 dot matrix LCD display, with operation buttons.

Display content: current date, time, measured value, current measured temperature, output current value

Function switching: turbidity measurement mode, dissolved oxygen saturation measurement mode, dissolved oxygen concentration measurement mode, ammonia nitrogen measurement mode, and COD measurement mode can be selected by pressing the button

Time display: The controller has a built-in clock chip that can display the current time.

Data storage: The built-in memory chip of the instrument can save the historical data of the past three days for easy search by the user.

Anti-interference ability: Using the latest devices, the impedance is as high as Ω; the current output adopts photoelectric coupling isolation technology, which has strong anti-interference ability and realizes remote transmission. Has good electromagnetic compatibility.

Communication interface: RS485 and 4-20ma signals are output simultaneously.

Watchdog design: industrial control watchdog: ensure that the instrument will not crash.

Relay settings: By default, it has two relay outputs, a high point and low point alarm relay and a low point alarm relay. The high and low alarm values of the device can be set, and the high and low alarm relay pull-in and cut-off values can be set respectively.

Relay load capacity: AC220V, 3A;

Range setting: You can set the zero range and full range corresponding to the device's current output.

Password protection: The device buttons are equipped with password protection function to prevent non-administrators from tampering with parameters.

Backlight design: When the lights are dim, workers can still clearly view the temperature data/time/date, etc. on the device. The backlight time can be set to stay on or how long it will take to turn off when there is no operation and enter the power-saving mode.

Buzzer setting: The buzzer alarm function can be turned on and off manually.

Button calibration: The time, real-time values of current temperature and water quality can be calibrated through the buttons.

2. Sensor parameters of online dissolved oxygen detector

project	Measuring range	Measurement error	resolution
Turbidity	Cell constant resolution: 0.1μs/cm; Cell constant resolution: 1μs/cm;	±5%FS（25℃）	The resolution of 0~200NTU and 0~1000NTU is 0.1NTU; the resolution of 0-4000NTU range equipment is 1NTU
Water quality dissolved oxygen	0~20mg/L (0~200% saturation)	±3%FS（25℃）	0.01mg/L, 0.1%
PH electrode	0~14.00pH	±0.15pH	0.01pH
Residual chlorine electrode	0-2mg/L; 0-10mg/L	±5%FS	0.01mg/L
temperature	-20~60℃	±0.5℃	0.1℃
Conductivity EC Electrode	Electrode constant K=1: 1~2000μs/cm; Electrode constant K=10: 10~20000μs/cm	±1%FS	Cell constant resolution: 0.1μs/cm; Cell constant resolution: 1μs/cm
Conductivity EC Electrode Salinity	0~11476ppm
Conductivity EC Electrode TDS	0~13400ppm
ORP electrode	-1999~1999mV	±1mV	1mV
Ammonia nitrogen electrode	0-100mg/l; 0-10mg/l optional	±3%FS	0.01mg/l
ammonium ion	0-100mg/L	5%FS	0.01mg/L or 0.1MG/L
nitrite
Nitrate
potassium ions
Magnesium ions	0-100mg/L, 0-1000mg/l
sodium ions
Calcium ions
Chloride	0-3500mg/L
COD	0~500mg/L equiv.KHP	±5%FS equiv.KHP（25℃）	0.1mg/L