Abstract: A modular flow measuring device comprises a controller, a third module with an optical sensor connected to the controller, and a fourth module with an amperometric sensor connected to the controller.

Abstract: A fitting for accommodating a sensor includes: an outer housing extending along a first axis including a primary inlet and a primary outlet for medium to flow through the outer housing, a cleaning inflow, and a cleaning outflow; an inner housing extending along the first axis and moveable about the first axis between a measurement position and a service position, the inner housing including a sensor chamber with a secondary inlet and a secondary outlet, wherein the secondary inlet is fluidically connected to the primary inlet, and the secondary outlet is fluidly connected to the primary outlet when the inner housing is in the measurement position, and wherein the cleaning inflow is fluidically connected to the secondary inlet and the cleaning outflow is fluidically connected to the secondary outlet when the inner housing is in the service position; and a sealing unit between the outer housing and the inner housing.

Abstract: A method for calibrating an amperometric sensor at a stationary measuring point, comprises the following steps: providing a mobile calibration device comprising a stabilized calibration fluid at the stationary measuring point; activating the stabilized calibration fluid and providing an activated calibration fluid; calibrating the amperometric sensor by means of the activated calibration fluid; and a mobile calibration device.

Abstract: An assembly for receiving a sensor to measure at least one measurand of a medium in a container includes: a housing having an immersion portion including a first opening and a second opening opposite the first opening; a rotatable valve body which includes a first valve body opening and a second valve body opening opposite the first valve body opening and forms a channel, wherein a service chamber is formed between the first and second valve body openings, wherein, in a first position of the valve body, the first opening, the second opening, the first valve body opening and the second valve body opening collectively form an opening to enable a flow through the service chamber and, when the valve body is in a second position, to block the flow through the service chamber; and a head plate including a first flushing connection and a second flushing connection.

Abstract: A fluid guiding module includes a housing having a sensor chamber having first and second chamber ends. The fluid guiding module includes a first connection region for connecting to a second fluid guiding module. The first connection is located on a first outer side of the housing and has a first redirection channel having first and second redirection channel ends. A chamber inlet channel fluidly couples the first redirection channel end to the first chamber end of the sensor chamber. The first redirection channel is adapted to be fluidly coupled to a chamber outlet channel of the second fluid guiding module.

Abstract: A flow-through measuring station includes at least one flow cell having a fluid channel. The fluid channel has a fluid inlet and a fluid outlet and is configured to conduct a liquid medium. One or more flow cells each include at least one sensor configured to be contacted with the medium and to determine at least one respective media property. At least one illumination unit is configured to indicate a respective state of at least one sensor. The measuring station also includes a transmitter/measuring transducer which is configured to operate the at least one sensor and the at least one illumination unit, and to determine in each case a state of at least one sensor.

Abstract: A fluid guiding module includes a housing having a sensor chamber having first and second chamber ends. The fluid guiding module includes a first connection region for connecting to a second fluid guiding module. The first connection is located on a first outer side of the housing and has a first redirection channel having first and second redirection channel ends. A chamber inlet channel fluidly couples the first redirection channel end to the first chamber end of the sensor chamber. The first redirection channel is adapted to be fluidly coupled to a chamber outlet channel of the second fluid guiding module.

Abstract: A flow-through measuring station includes at least one flow cell having a fluid channel. The fluid channel has a fluid inlet and a fluid outlet and is configured to conduct a liquid medium. One or more flow cells each include at least one sensor configured to be contacted with the medium and to determine at least one respective media property. At least one illumination unit is configured to indicate a respective state of at least one sensor. The measuring station also includes a transmitter/measuring transducer which is configured to operate the at least one sensor and the at least one illumination unit, and to determine in each case a state of at least one sensor.