1、 Product Overview

Dissolved oxygen is the measurement of the amount of oxygen dissolved in an aqueous solution. Using the spectral measurement principle, the solubility value depends on the temperature, pressure, and salinity of the aqueous solution. The instrument adopts LCD display for measuring and displaying DO value and medium temperature value, with analog signal and digital signal output as well as control function. Dissolved oxygen (DO) is an indicator for evaluating the self purification capacity of water bodies. A high dissolved oxygen content indicates a strong self purification ability of the water body; On the contrary, it means that pollutants in the water are not easily oxidized and decomposed, and anaerobic bacteria will multiply in large numbers, causing the water quality to become foul smelling. Widely used in industries, agriculture, scientific research, environmental protection, and other fields.

Scope of Application

Wastewater treatment: Measurement and regulation of oxygen in activated sludge tanks to achieve high efficiency in biodegradation processes.

Hydrological monitoring: measuring the amount of O2 in rivers, lakes, and oceans to control water quality.

Aquaculture: Monitoring and regulating oxygen content in water tanks to maintain ecological and growth conditions.

3、 Performance characteristics

1. Spectral measurement principle, sensitive reflection, stable and reliable measurement;

2. Special film coating technology to eliminate impurities and interference, and resist pollution;

3. Can display dissolved oxygen content in mg/L ppb、ppm、% Different display modes;

4. Intelligent module self diagnostic technology, error alarm display;

5. Long term stable and reliable use, easy maintenance;

6. High precision automatic temperature compensation system;

7. Multiple signal outputs and alarm settings, typical dosing control;

8. LCD display, with a beautiful and exquisite appearance;

9. Diverse installation methods and easy maintenance

4、 Technical parameters

Test performance

1. Measurement range: 0-20mg/L

2. Accuracy:  0.1 mg/L

3. Resolution: 0.01 mg/L

4. Calibration: Factory calibration, can be compared and verified on site

5. Temperature compensation: automatic temperature compensation

6. Display: LCD liquid crystal display

signal output

1. Switching quantity: 2 sets of relays, with a capacity of AC230V/5A. Digital quantity: RS485 module (ModBus protocol)

2. Analog output: 4-20mA (four wire system), * large load 750 μ m

3. Switch output: 2 sets of relays, capacity AC230V/5A

4. Digital interface: RS485 (ModBus protocol)

power supply

Power supply: AC220V ± 10%, 50Hz (optional DC 24V)

physical property

1. Material: The transmitter is made of ABS

2. The sensor is made of polyester and epoxy resin

3. Connection method: Upper and lower 3/4 NPT external thread

4. Installation methods: bracket insertion, circulation, insertion

5. Cable length: 10 meters (can be extended up to 20 meters)

ENVIRONMENTAL

1. Protection, etc. *: transmitter IP65

2. Electricity * IP68

3. Working temperature: transmitter -20~55 ℃

4. Electricity * 0~60 ℃

5. Environmental humidity: Relative humidity ≤ 85%

6. Work pressure: ≤ 0.3MPa