| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an air driven shutter device that requires no electric power, can be used without involving danger even in a location of a high explosion possibility, and can be made inexpensive with a simple structure. <P>SOLUTION: The air driven shutter device is used in an optical analyzer comprising a measurement field where a sample is supplied, a light emission section for outputting measurement light to the sample in the measurement field, a light receiving section to which the measurement light that has passed through the sample is input, and a purge air supply section for supplying purge air. The air driven shutter device includes a shutter provided between the measuring field and the light emission section and/or the light receiving section, and a shutter open/close mechanism that makes the shutter in an opened state by the pressure of gas supplied by the purge air supply section, and makes the shutter in an closed state in response to decrease of the pressure of the gas supplied by the purge air supply section to a prescribed value or lower. <P>COPYRIGHT: (C)2012,JPO&INPIT |
