Abstract
In this research is designing and manufacture Phytoplankton concentration measurements in liquid medium based on arduino microcontroller. The design works with by exploiting fluorescence phenomenon, by using Purple Light Emitting Diode (λ = 405 nm, P = 10 mW, frequency modulation 625 Hz) as a light source absorbed by phytoplankton, mesuring vessel, optical filters, and photodiodes. Data obtained of the photodiode sensor is then conducted data acquisition by arduino, the quantitiy of phytoplankton concentration will be displayed on the lcd. From testing to Phytopathton for the concentration range it was found that for the concentration range 102 - 106 cells / ml obtained a consistent relationship the intensity of fluorescence with the increase in cell concentration. Gradients obtained for high range concentration with R2 = 0.9632 lower than the low range concentration with R2 = 0.9642.
Highlights
Indonesia is an archipelago country where the geographical area of 75% is the ocean, one of nature potential with various marine fauna such as fish, terumbu karang, zooplankton, phytoplankton and others
We need an observation to know the amount of phytoplankton concentration in a water area
In this study the method used to detect the presence of phytoplankton using optical methods as light media
Summary
Indonesia is an archipelago country where the geographical area of 75% is the ocean, one of nature potential with various marine fauna such as fish, terumbu karang, zooplankton, phytoplankton and others. In this study the method used to detect the presence of phytoplankton using optical methods as light media. To identify the presence of phytoplankton requires a high-resolution microscope and a UV-Vis current spectrophotometer This tool can only be operated in laboratory labs and can not operate in real time, this tool has an economical value is expensive. The basis of the optical measurement method utilizes the effects of light absorption on a particular region by phytoplankton. The optical measurement method is a method of measurement whose resolution is within the wavelength dimension of the micrometer-nanometer scale so that expected by the optical method used in this study can yield accurate measurement data in identifying the presence / types and quantities of phytoplankton species. − Designing microcontroller based phytoplankton measuring instrument as a data processing center
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