MS-301 Multi parameter Water Quality Sensor
Web:www.boquinstrument.com
2.9 Blue-green Algae Sensor
Principle:
Blue-green algae, also known as cyanobacteria, is a widely distributed prokaryotic microorganism that is
closely related to the environmental quality of water bodies. When the water body grows vigorously, it
will cause discoloration and odor.
The blue-green algae sensor utilizes the characteristic that the cyanobacteria has an absorption peak and
an emission peak in the spectrum, and a monochromatic light emitting a specific wavelength is irradiated
into the water, and the cyanobacteria in the water absorbs the energy of the monochromatic light,
releasing a single wavelength single. The color of light, the light intensity emitted by blue-green algae is
proportional to the content of cyanobacteria in the water. The appearance of the blue-green algae sensor is
shown in Figure 11.
Figure 11 Blue-green algae Sensor
Blue-green algae Sensor Specification
Principle
Fluorescence method
Range
200-300000 cells/mL
Resolution
20 cells/mL
Accuracy
The signal level of 1ppb rhodamine WT dye corresponds
to ±10% of the value(At the same temperature)
2.10 Ammonia Nitrogen Sensor
The NH4 ion selective electrode is a grid film electrode
，
the material of which mainly uses a special
organic ion exchange membrane that dissolves in the organic solution and penetrates with the PVC mesh.
The fields it is widely used include: drinking water, fertilizer, and refrigerant. To use the electrode
requires the reference electrode, it has good repeatability and faster response time, but its accuracy is no
better than the colorimetric method. The outer appearance of the ammonia nitrogen sensor is shown in