公开(公告)号：US3788145A

公开(公告)日：1974-01-29

申请号：US3788145D

申请日：1973-03-14

Applicant: PRO TECH INC

Inventor： IRWIN M

IPC: G01N1/14

CPC classification number: G01N1/14

Abstract: Equipment for sampling liquid at intervals controllable by adjusting the rate of accumulation of sample-propulsion fluid is provided with means for extending the intervals at which samples are taken and the duration of the taking of such samples. A pressure-responsive switching valve effective to interconnect accumulated propellant to a sampling locus in the liquid at a given accumulated pressure is partially shielded from sensing the pressure drop resulting from such interconnection, thus extending the period required for the pressure to reaccumulate to the switching level. The range from shortest to longest sampling interval is adjustable by varying the degree of such shielding.

Abstract translation: 提供了通过调节样品推进液积累速率可控的间隔采样液体的设备，其具有用于延长采样时间间隔和采样时间的手段。 有效地将累积的推进剂与给定累积压力下的液体中的取样轨迹相互连接的压力响应切换阀被部分地屏蔽，以防止由这种互连造成的压降，从而延长压力所需的时间以重新累积到开关水平 。 从最短到最长采样间隔的范围可以通过改变这种屏蔽的程度来调节。