A method of testing the rotor engagement of a peristaltic pump rotor. The method comprising steps of providing a pump system comprising a peristaltic pump rotor; a tube; a valve; a pressure sensor; a comparator; and a processor. The pressure sensor is configured to monitor the pressure in a fluid in the tube downstream of the peristaltic pump rotor and upstream of the valve. The comparator is configured to continuously monitor the pressure sensor and compare the measured fluid pressure data with a predetermined parameter. The processor is configured to receive a signal from the comparator and generate an alert signal when the measured pressure data falls outside the predetermined parameters.

A method of testing the rotor engagement of a peristaltic pump rotor. The method comprising steps of providing a pump system comprising a peristaltic pump rotor; a tube; a valve; a pressure sensor; a comparator; and a processor. The pressure sensor is configured to monitor the pressure in a fluid in the tube downstream of the peristaltic pump rotor and upstream of the valve. The comparator is configured to continuously monitor the pressure sensor and compare the measured fluid pressure data with a predetermined parameter. The processor is configured to receive a signal from the comparator and generate an alert signal when the measured pressure data falls outside the predetermined parameters.

The invention relates to a medical treatment apparatus comprising a tube set 20, a peristaltic pump 6 for conveying fluid, and a monitoring apparatus 15 for monitoring the occlusion of the positive displacement elements 13A, 13B of the peristaltic pump. In addition, the invention relates to a tube set 20 for a medical treatment apparatus, and to a method for monitoring the occlusion of the occlusion elements of a peristaltic pump for conveying a fluid for a medical treatment apparatus. The invention is based on the fact that the occlusion of the positive displacement elements 13A, 13B of the peristaltic pump 6 is monitored in order to monitor the fluid flow in the hose line 5. For this purpose, the electrical resistance or a variable which correlates with the electrical resistance is measured between a first and a second electrode 16A, 16B, the first electrode 16A being arranged on the hose line 5 upstream of the occlusion elements 12 of the peristaltic pump 6 and the second electrode 16b being arranged on the hose line downstream of the occlusion elements such that an electrical contact is produced between the first and second electrode 16A, 16B and the fluid flowing in the hose line 5. The electrodes 16A, 16B are preferably integral component parts of a connecting piece 10, by means of which the hose segment 5A to be inserted into the peristaltic pump 6 is fixed in the form of a loop.

The disclosure relates to a position detection device for determining the position of the diaphragm or the drive piston of an electric-motor-driven diaphragm pump, in particular detecting the upper and lower reversal point (Po, Pu) in the movement curve of the diaphragm of a diaphragm pump operated in an electric-motor-driven manner via eccentric means, wherein a diaphragm actuated by a drive connecting rod closes a conveying chamber with valve means provided on an inlet and outlet side such that the volume can be changed between a minimum and maximum volume, whereby a reciprocating movement of an electric motor having a rotor attached to a shaft is converted into an actuation movement of the drive connecting rod via the effect of the eccentric means, wherein the position detection device has detecting means for detecting the average value position of the rotor shaft, as well as an evaluation device in order to determine at least the position of the upper reversal point of the diaphragm from the average value position.

The present disclosure provides a control method of a fluid device. The control method includes the steps of (a) providing the fluid device, which includes a plurality of flow guiding units manufactured by a micro-electro-mechanical-system process; (b) dividing the flow guiding units into a plurality of groups, which are electrically connected to and controlled by a control module; and (c) generating a driving signal by the control module for a corresponding one of the groups, wherein the control module generates a high level signal to a specific one of the groups, so that the flow guiding units of the specific one of the groups are driven to transport fluid, and thereby controlling the fluid device to discharge a specific amount of fluid.

Embodiments of the disclosure include a miniature optical PM sensor module. A miniature optical particulate matter sensor module may comprise a housing; a micro airflow generator positioned within the housing; an actuator positioned adjacent to the micro airflow generator and configured to drive the micro airflow generator; a miniature particulate matter sensor board assembly in fluid communication with the micro airflow generator; and a flex cable assembly configured to attach to at least one of the housing and the miniature particulate matter sensor board assembly.

Embodiments of the disclosure include a miniature optical PM sensor module. A miniature optical particulate matter sensor module may comprise a housing; a micro airflow generator positioned within the housing; an actuator positioned adjacent to the micro airflow generator and configured to drive the micro airflow generator; a miniature particulate matter sensor board assembly in fluid communication with the micro airflow generator; and a flex cable assembly configured to attach to at least one of the housing and the miniature particulate matter sensor board assembly.

A disposable medical flow-regulating assembly includes flow-directing units, with multiple fluid-flow lines entering each of the flow-directing units. The flow-directing units are interconnected by a fluid-flow line that extends between them. Each of the flow-directing units includes a rotational insert member that regulates which of multiple flow passages through the flow-directing unit is open and which are closed, based on the angular position of the insert member.

Present examples provide a fluid ejection apparatus which may comprise a pump having a pump body and a plurality of diaphragms disposed in the pump body. A plurality of fluid chambers are each associated with the plurality of diaphragms. A timing mechanism may open a leading fluid chamber of the plurality of fluid chambers and close a trailing fluid chamber of the plurality of chambers simultaneously with movement of corresponding pairs of the diaphragms. A third fluid chamber may be in a dwell mode. The movement of the timing mechanism causes discreet packet transfer of fluid between the leading and trailing fluid chambers or between a fluid chamber and a coupling.

An extra-capillary fluid cycling unit for maintaining and cycling fluid volumes in a cell culture chamber includes a housing and a first flexible reservoir extra-capillary fluid reservoir disposed in the housing. The extra-capillary fluid reservoir is in fluid communication with a cell culture chamber. A second flexible reservoir is also located in the housing, the second flexible reservoir being in fluid communication with a pressure source. A sensor plate is movably disposed in the housing between the extra-capillary reservoir and the second reservoir, wherein the second reservoir is pressurized to move the sensor plate in relation to the extra-capillary reservoir to cause fluid cycling and maintain fluid volumes in the cell growth chamber.