MEJ-DO700 Optical dissolved oxygen meter is an instrument used to measure the concentration of dissolved oxygen (DO) in water bodies, widely used in environmental monitoring, water quality analysis, aquaculture, sewage treatment, and scientific research.
The core principle is based on fluorescence quenching method: by emitting light of a specific wavelength to irradiate the fluorescent substance on the surface of the sensor, the substance will undergo fluorescence quenching phenomenon in the presence of oxygen (fluorescence intensity will decrease or lifetime will be shortened), and the instrument will deduce the dissolved oxygen concentration by detecting the change in fluorescence signal.
Characteristics:
Range: 0-20mg/L,0-200%,0-400hPa
Resolution: 0.01mg/L,0.1%,1hPa
Output signal: 4~20mA; Relay; RS485
Power supply: AC220V±10%; 50Hz/60Hz
Intro to MEJ-DO700 Optical dissolved oxygen meter
Optical dissolved oxygen analyzer is an instrument used to measure the concentration of dissolved oxygen (DO) in water bodies, widely used in environmental monitoring, water quality analysis, aquaculture, sewage treatment, and scientific research.
The core principle is based on fluorescence quenching method: by emitting light of a specific wavelength to irradiate the fluorescent substance on the surface of the sensor, the substance will undergo fluorescence quenching phenomenon in the presence of oxygen (fluorescence intensity will decrease or lifetime will be shortened), and the instrument will deduce the dissolved oxygen concentration by detecting the change in fluorescence signal.
Main features:
Membrane free design:
The breathable membrane without traditional electrode method avoids problems such as membrane fouling and electrolyte consumption, making maintenance more convenient.
Quick response:
Real time monitoring, stable data can be output within seconds, suitable for dynamic environment monitoring.
High precision and anti-interference:
Not affected by chemical substances (such as sulfides and heavy metals) in the water, the measurement results are more reliable.
Low power consumption and portability:
Some models support portable operation and are suitable for rapid field or on-site testing.
Application scenarios:
Environmental monitoring:
Assessment of water quality in rivers, lakes, and oceans, monitoring of eutrophication in water bodies, and other related issues.
Aquaculture:
Real time monitoring of dissolved oxygen in aquaculture ponds, optimizing oxygen supply systems, and ensuring the health of aquatic organisms.
Industrial production:
Process control of sewage treatment plants, monitoring of dissolved oxygen in boiler water, etc.
Optical dissolved oxygen analyzer, with its high efficiency and accuracy, is gradually replacing traditional electrochemical methods (such as polarography) and becoming one of the mainstream tools for modern water quality monitoring.
| Product | Dissolved oxygen meter |
| Model | MEJ-DO700 |
| Measure range | 0-20mg/L, 0-20ppm, 0-45deg C |
| Accuracy | Resolution:±3%, Temperature: ±0.5℃ |
| Pressure range | ≤0.3Mpa |
| Calibration | Automatic air calibration,Sample calibration |
| Sensor material | SUS316L+PVC (Ordinary Version), |
| Titanium Alloy (Seawater Version) | |
| O-ring: Fluoro-rubber; Cable: PVC | |
| Cable length | Standard 10-Meter Cable, Max : 100m |
| Display | 128 * 64 dot matrix LCD with LED backlight |
| Output | 4-20mA(Max three-way); |
| RS485 MODBUS; | |
| Rlay output(Max three-way); | |
| Power supply | AC220V, 50Hz,(optional 24V） |
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Component workshop
Calibration workshop
Product verification
