Micro sensor applied to detection of nitrogen, phosphorus and potassium in soil
A detection sensor, nitrogen, phosphorus and potassium technology, applied in the field of detection sensors, can solve the problems of many samples to be tested, large volume, high equipment maintenance cost, and achieve the effects of improving portability, good repeatability and low production cost
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[0011] The miniaturized soil nitrogen phosphorus potassium detection sensor that the present invention proposes, its structure is as follows figure 1 As shown, it includes a photoelectric sensor 7 , a package protection layer 1 , a liquid channel layer 2 , a support layer 3 , an on-chip light source 11 and a printed circuit board layer 4 . The encapsulation protection layer 1 , the liquid channel layer 2 , the support layer 3 and the printed circuit board layer 4 are sequentially laminated together. The photoelectric sensor 7 is encapsulated in the central bottom of the encapsulation protection layer 1, and the two sides of the encapsulation protection layer 1 are respectively provided with a liquid inlet hole 5 and a liquid outlet hole 8. A fluid flow channel 9 is processed on the liquid flow channel layer 2, and both sides of the liquid flow channel 9 are respectively connected with the liquid inlet hole 5 and the liquid outlet hole 8 on the packaging protection layer. The ...
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