| 摘要 |
PURPOSE:To provide the titled system capable of analyzing culture liquids of a number of hydroponic beds with single analytic apparatus, by analyzing culture liquids collected from plural hydroponic beds, sterilizing the culture liquids and returning to the hydroponic bed or discarding the culture liquids. CONSTITUTION:The objective system contains a suction pump 7 to suck culture liquids of hydroponic beds 1A, 1B, 1C... through solenoid valves 4A, 4B, 4C..., an analytic cell 2, a heater 3 for thermal sterilization and a return pipe 6. A solenoid valve corresponding to the hydroponic bed to be analyzed is opened to introduce the culture liquid into the analytic cell 2 and the pH and electrical conductivity of the culture liquid are determined by a pH sensor 8 and an EC sensor 9, respectively. The culture liquid discharged from the cell 2 is heated with a heater 3 and returned to the original hydroponic bed or discarded. |
