| 摘要 |
Disclosed is a membrane filtration device capable of more suitably disposing a radio antenna so as to successfully perform radio communication. An internal member (100), at least part of the outer wall of which is close to the inner wall of a pressure-resistant container (40) is provided to a position different from that between a filtration membrane within the pressure-resistant container (40) and the inner wall of the pressure-resistant container (40), and a radio antenna (103A) is provided to the internal member (100). The at least part of the outer wall of the internal member (100) is close to the inner wall of the pressure-resistant container (40), so that the thickness of a stock solution present between the outer wall and the inner wall of the pressure-resistant container (40) is small, and attenuation of radio waves due to the stock solution can be minimized, thereby making it possible to successfully perform the radio communication. Furthermore, restrictions on the position at which the radio antenna (103A) is disposed can be relaxed to more suitably dispose the radio antenna (103A) as compared with the case in which the radio antenna (103A) is provided between the filtration membrane within the pressure-resistant container (40) and the inner wall of the pressure-resistant container (40). |
