| 摘要 |
PURPOSE:To obtain a device which can collect a sample of low pressure, at a low cost and with high reliability, by providing a bypass system on the inside of an automatic pressure reducing mechanism, and operating the switching of this bypass system, based on the pressure detecting mechanism of a built-in pressure transducer. CONSTITUTION:In an automatic pressure reducing mechanism 30 provided with an adjustable pressure reducing part 32, throttle valve 34, pressure transducer 36 and a control part 38, with respect to a sample collecting system 10, bypass system 46 provided with the second throttle valve 42 and an automatic opening and closing valve 44 consisting of a solenoid valve with respect to said throttle valve 34 is provided additionally. When a pressure detected value detected by the pressure transducer 36 is below a prescribed value, this automatic opening and closing valve 44 discriminates this state by the control part 38, and opens the bypass system by supplying a prescribed control signal to the automatic opening and closing valve 44. |
