| 摘要 |
PROBLEM TO BE SOLVED: To provide a water-level controlling apparatus provided with a water level sensor in a culture bed, facilitating the adjustment of a culture liquid level suitable for the culturing object, enabling easy adjustment of the amount of water for culture and giving excellent diffusibility and uniformity of culture liquid. SOLUTION: At least two sensors 13, 14 respectively detecting the high level and the low level of water are placed in a culture bed 10. Preferably, the sensor is placed in a bottom-opened transparent pipe in the culture bed 10. |
