Dissolved oxygen is a measure of the content of dissolved oxygen Aq.solution. Polarographic measuring principle, depending on the value of dissolved Aq.solution temperature, pressure and salinity of the solution. Using liquid crystal display meter, used to measure and display DO value and the medium temperature, with analog Signal. And Digital Signal. Outputs and control functions. Dissolved oxygen (DO), the evaluation of water self-purification capacity. High dissolved oxygen content, indicating that self-purification ability of water; on the contrary represents less susceptible to oxidation decomposition of pollutants in water, then the anaerobic fungus will multiply, make the water smell. Widely used in industry, agriculture, scientific research, environmental protection and other fields. 
Features: 
Polarographic measuring principle, reflecting the sensitivity, stable and reliable measurement; 
Special coating technology, eliminate impurities interference, anti-pollution; 
It displays the amount of dissolved oxygen mg / L, ppb, ppm,% different display mode; 
Intelligent module self-diagnostic technology, error alarm display; 
Long-term use of stable and reliable, easy maintenance; 
High-precision automatic temperature compensation system; 
A variety Signal output, alarm setting, typical dosing control; 
LCD liquid crystal display, exquisite appearance; 
Installation and diverse, simple maintenance. 
Applications: 
Sewage Water treatment: oxygen activated sludge tank measurement and adjustment in order to achieve High efficient in the biodegradation process. 
Hydrological monitoring: Measuring rivers, lakes, oceans O2 amount, control of water quality. 
Aquaculture: Pool oxygen content monitored and adjusted to maintain the best ecological and growth conditions.

Test performance: 
Measuring range: 0 ~ 20mg / L 
Accuracy: ± 0.02 mg / L 
Resolution: 0.01 mg / L 
Calibration: Factory calibration, field calibration comparison 
Temperature compensation: Automatic temperature compensation 
Display: LCD display

. Signal output: 
Analog output: 4 ~ 20mA, maximum load 750Ω 
Switch output: 2 relays, capacity AC230V / 5A 
Digital interface: RS485 (ModBus protocol) 
powered by: 
Power supply: AC220V ± 10%, 50Hz

Physical properties:

Material: Transmitter to PC 
Sensor as polyesters, epoxy resins 
Connection: 3/4 NPT male thread up and down 
Installation: bracket submersible, circulation, plug-in 
Cable length: 10 meters 
Environmental Performance: 
Protection class: IP65 Transmitter 
Electrode IP68 
Working temperature: -20 ~ 55 ℃ Transmitter 
Electrode 0 ~ 60 ℃ 
Humidity: Relative humidity ≤85% 
Working pressure: ≤0.3MPa

Selection coding SOD2110

Example: SOD2110M1-DO200 Dissolved Oxygen represented Wall-host, constant oxygen electrode.

Optional accessories: