Xi'an Desun Uniwill Electronic Technology Co., Ltd.
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Chlorophyll sensors typically utilize fluorescence or absorption techniques to quantify the chlorophyll content. Here are some key features of chlorophyll sensors:
Fluorometers:
Fluorometers are commonly used in chlorophyll sensors. They emit light at a specific wavelength and measure the fluorescence emitted by chlorophyll molecules when excited. The intensity of fluorescence is directly proportional to the concentration of chlorophyll in the sample.
Absorption Spectroscopy:
Chlorophyll sensors may also employ absorption spectroscopy to measure the concentration of chlorophyll. Absorption spectroscopy involves shining light of specific wavelengths onto the sample and measuring the amount of light absorbed by the chlorophyll molecules. The extent of absorption correlates with the chlorophyll concentration.
Multiple Wavelengths:
To accurately measure chlorophyll concentration, some sensors utilize multiple wavelengths. Different types of chlorophyll (such as chlorophyll a and chlorophyll b) absorb light at different wavelengths. By measuring absorption or fluorescence at multiple wavelengths, the sensor can differentiate between various chlorophyll pigments and provide more detailed information about their concentrations.
Calibration:
Chlorophyll sensors require calibration to convert the measured fluorescence or absorption values into actual chlorophyll concentrations. Calibration involves using a known standard of chlorophyll and establishing a relationship between the sensor output and the chlorophyll concentration.
Water Correction:
In aquatic environments, the presence of water can interfere with the accuracy of chlorophyll measurements. As water absorbs and scatters light, it can affect the chlorophyll signal. Therefore, chlorophyll sensors often include algorithms or correction methods to account for the water's influence and provide accurate chlorophyll measurements.
Portable and Field-Friendly Design:
Chlorophyll sensors are often designed to be portable and suitable for field measurements. They may be handheld or mounted on autonomous platforms and equipped with built-in or external data storage capabilities for on-site measurements.
Integration with Water Quality Monitoring Systems:
Chlorophyll sensors can be integrated into larger water quality monitoring systems or networks. This allows for continuous, long-term monitoring of chlorophyll levels in different aquatic environments, providing valuable information for research, ecological assessments, and water management.
The fiber-optic chlorophyll sensor adopts the principle of the fluorescence method. According to the spectral absorption characteristics of chlorophyll a, the water body is irradiated by a high-energy LED light source, and the chlorophyll a in the water body is excited to generate fluorescence of a specific wavelength, and the concentration of chlorophyll a in the water is measured. The sensor's fiber-optic structure provides excellent repeatability and stability and is less susceptible to ambient light. With automatic cleaning, the brush eliminates air bubbles, reduces the impact of contamination on the measurement, makes the maintenance cycle longer, and maintains excellent stability for long-term online use.
