A level indicating device for a tank includes: a differential pressure type level gauge configured to measure a level of a fluid in a tank on the basis of a pressure according to the level of the fluid in the tank; and a level indicator configured to indicate the level of the fluid by moving in a vertical direction according to a differential pressure signal measured by the differential pressure type level gauge.

A level indicating device for a tank includes: a differential pressure type level gauge configured to measure a level of a fluid in a tank on the basis of a pressure according to the level of the fluid in the tank; and a level indicator configured to indicate the level of the fluid by moving in a vertical direction according to a differential pressure signal measured by the differential pressure type level gauge.

According to one aspect, a lubricant level sensing system for an actuator is provided. The lubricant level sensing system includes a pressure port in an outer housing of the actuator, a pressure sensor, and a pathway from the pressure port to the pressure sensor. The pathway establishes fluid communication between the pressure sensor and a free volume of an internal cavity of the outer housing relative to a lubricant level in the internal cavity such that the pressure sensor detects a pressure of the free volume used to derive the lubricant level.

The sensor device serves for detecting the absence or presence of a liquid (1) at the outlet (10a) of a feed line (10) through which there can be fed a feed substance which, when exiting from the outlet, has a pressure (p) in the feed line which has a course over time with a first characteristic in the absence of the liquid and has a course over time with a second characteristic in the presence of the liquid. The sensor device includes a sensing instrument (20-23) for sensing the pressure fluctuations in the feed line (10) and evaluator (30) which is designed to assign the sensed pressure fluctuations to the first or second characteristic and to generate a corresponding signal which indicates whether the liquid (1) is absent or present at the feed line outlet (10a).

The invention concerns a device (1) for measuring a fill level of a flexible medicine reservoir (6). The device (1) comprises a support (2) for supporting the flexible medicine reservoir (6) and a leaf spring member (3). A first section (31) of the leaf spring member (3) is mounted to a fixed bearing. A second section (32) of the leaf spring member (3) is guided by a floating bearing. The leaf spring member (3) is designed for contacting the flexible medicine reservoir (6) and for providing that changes in the fill level of the flexible medicine reservoir (6) effect changes of the form of the leaf spring member (3). A detector (5) is arranged for detecting the effected changes of the form of the leaf spring member (3) and for enabling measuring of the fill level of the flexible medicine reservoir (6).

The invention concerns a device (1) for measuring a fill level of a flexible medicine reservoir (6). The device (1) comprises a support (2) for supporting the flexible medicine reservoir (6) and a leaf spring member (3). A first section (31) of the leaf spring member (3) is mounted to a fixed bearing. A second section (32) of the leaf spring member (3) is guided by a floating bearing. The leaf spring member (3) is designed for contacting the flexible medicine reservoir (6) and for providing that changes in the fill level of the flexible medicine reservoir (6) effect changes of the form of the leaf spring member (3). A detector (5) is arranged for detecting the effected changes of the form of the leaf spring member (3) and for enabling measuring of the fill level of the flexible medicine reservoir (6).

A chromatography system comprising a mixing circuit or a mixing chamber, a bubble trap, a concentration detector and one or more pumps, characterized in that the bubble trap has a permanent opening at its highest point is described herein. Furthermore, a chromatography system is described, characterized in that it contains two concentration detectors the first of which is located in the mixing circuit or the mixing chamber and the second is located downstream of the main pump.

A pneumatic probe includes a port adaptor and a pneumatic core. The port adaptor includes an insertion head that includes a hook, and a backstop alongside the insertion head behind, and in spaced opposition with, the hook. The insertion head is reconfigurable between an expanded configuration and a contracted configuration. The backstop is movable, along the insertion head, between an extended position and a retracted position, in which the backstop is respectively advanced toward the hook and backed away from the hook. The pneumatic core includes a downtube extending through the insertion head, and a blocker on the downtube interfaced with the insertion head. The downtube is movable, through the insertion head, between a blocking position and an unblocking position with respect to the insertion head.

A pneumatic probe includes a port adaptor and a pneumatic core. The port adaptor includes an insertion head that includes a hook, and a backstop alongside the insertion head behind, and in spaced opposition with, the hook. The insertion head is reconfigurable between an expanded configuration and a contracted configuration. The backstop is movable, along the insertion head, between an extended position and a retracted position, in which the backstop is respectively advanced toward the hook and backed away from the hook. The pneumatic core includes a downtube extending through the insertion head, and a blocker on the downtube interfaced with the insertion head. The downtube is movable, through the insertion head, between a blocking position and an unblocking position with respect to the insertion head.

A chromatography system comprising a mixing circuit or a mixing chamber, a bubble trap, a concentration detector and one or more pumps, characterized in that the bubble trap has a permanent opening at its highest point is described herein. Furthermore, a chromatography system is described, characterized in that it contains two concentration detectors the first of which is located in the mixing circuit or the mixing chamber and the second is located downstream of the main pump.