Plant husbandry – Water culture – apparatus or method – Nutrient recirculation system
Patent
1994-09-06
1997-02-04
Raduazo, Henry E.
Plant husbandry
Water culture, apparatus or method
Nutrient recirculation system
A01G 3100
Patent
active
055986633
ABSTRACT:
A hydroponic nutrient solution control system capable of performing the nutrient solution control automatically, accurately, effectively, and efficiently. In the system, the supplies of the acid nutrient ion ingredient solutions and the alkali nutrient ion ingredient solutions from the acid solution tanks and the alkali solution tanks to the nutrient solution tank are controlled according to the pH measured by the pH meter and the ion concentrations measured by the ion analyzer. The system may also controls the supplies of the high concentration nutrient solutions and the water from the high concentration nutrient solution tanks and the water supply according to the electrolytic conductivity measured by the electrolytic conductivity meter.
REFERENCES:
patent: 4149970 (1979-04-01), Atkins
patent: 4152215 (1979-05-01), Yoshino
patent: 4294037 (1981-10-01), Mosse
patent: 4320594 (1982-03-01), Raymond
patent: 4926585 (1990-05-01), Dreschel
patent: 4992942 (1991-02-01), Bauerle
patent: 5184420 (1993-02-01), Papadopoulos
Oakton WD-00661-10 "Dissolved Solid Tester" Considered by the examiner to be an ion analyzer means as claimed by the applicant, Devices of this sort have been in use in the hydroponics industry for many years.
The ABC of NFT by Dr. Allen Coope pp. 47-89.
Kabushiki Kaisha Toshiba
Raduazo Henry E.
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