Abstract: A laboratory analyzer for manually handling a plurality of reagents is disclosed. The laboratory analyzer comprises a computing device comprising a display for displaying a workflow of a pipetting process comprising a plurality of method steps to an operator, a pipette for pipetting reagents connected to the computing device, a plurality of compartments for receiving a plurality of reagents vessels including reagents to be pipetted by the pipette, and a camera connected to the computing device. The camera is adapted to acquire data from a vision analysis of at least the plurality of compartments during manually carrying out a pipetting process by the operator according to the workflow. The computing device is adapted to compare the data to target data correlated to the plurality of method steps of the workflow. Further, a method for operating a laboratory analyzer for manually handling a plurality of reagents is disclosed.

Abstract: A sample preparation dosing unit for liquid dosing is provided comprising an inlet port and an outlet port fluidically coupling the sample preparation dosing unit to a supply and target, respectively; a pump, fluidically arranged between the inlet port and the outlet port; an outlet flow restrictor with an outlet flow resistance, fluidically arranged between a pump outlet and outlet port; and a control arrangement with a branch, a control valve, and a control flow restrictor with a control flow resistance. The branch divides the flow at the pump outlet into an outlet flow through the outlet flow restrictor and into a control flow through the control flow restrictor. The control flow downstream of the control flow restrictor is fed, depending on the state of the control valve, either into the outlet port thereby merging with the outlet flow downstream of the outlet flow restrictor, or into a bypass conduit.

Abstract: A sample preparation dosing unit for liquid dosing is provided comprising an inlet port and an outlet port fluidically coupling the sample preparation dosing unit to a supply and target, respectively; a pump, fluidically arranged between the inlet port and the outlet port; an outlet flow restrictor with an outlet flow resistance, fluidically arranged between a pump outlet and outlet port; and a control arrangement with a branch, a control valve, and a control flow restrictor with a control flow resistance. The branch divides the flow at the pump outlet into an outlet flow through the outlet flow restrictor and into a control flow through the control flow restrictor. The control flow downstream of the control flow restrictor is fed, depending on the state of the control valve, either into the outlet port thereby merging with the outlet flow downstream of the outlet flow restrictor, or into a bypass conduit.

Abstract: The invention relates to a probe for measuring the partial pressure of a gas in a fluid according to the permeation carrier gas method, in particular of oxygen or hydrogen, in a fluid at high temperatures and/or high pressures. The probe comprises a probe body having a wall which comprises a dense plastic layer which is permeable to the gas to be measured, wherein the outside of said plastic layer is in contact with the fluid. The wall of the probe additionally comprises a porous carrier material which is arranged on the inside of the dense, permeable plastic layer and is connected at least at portions to said plastic layer in order to support the plastic layer. Furthermore, the present invention relates to measuring apparatus comprising such a probe, as well as to a measuring method with such a probe.