Abstract: A vacuum filtration head (1) having a receptacle for a support (2) for a membrane filter (3) for microbiological testing of a liquid substance to be drawn from an upstream side of the membrane filter (3) to a downstream side of the membrane filter (3) through the membrane filter (3), or the support (2) for such membrane filter (1), a drain chamber (4) located downstream of the support (2) and communicating with a downstream side of the membrane filter (3) receiving the liquid substance passed through the membrane filter (3), and a drain channel (5) communicating with the drain chamber (4) at an opening (9) and communicating with a vacuum. A protective shield (6) is arranged in the filtration head (1) interfering with a fictive direct line connection while retaining a fluid path (7) to the drain channel (5) past the protective shield (6).

Abstract: A sanitation assembly (1) comprising a first chamber (2) with a first volume (2a) for receiving a first fluid, and a second chamber (3) with a second volume (3a) for receiving a second fluid, wherein the first volume (2a) communicates with an outlet (6) of the assembly (1) via a first valve mechanism (4) configured to allow discharge of the fluid from the first volume (2a) to the outlet (6) at a predefined first opening pressure, wherein the second volume (3a) communicates with the outlet (6) of the assembly (1) via a second valve mechanism (5) configured to allow discharge of the fluid from the second volume (3a) to the outlet (6) at a predefined second opening pressure, and wherein the predefined second opening pressure of the second valve mechanism (5) is higher than the predefined first opening pressure of the first valve mechanism (4).

Abstract: The present invention provides a calibration device for an optical detector comprising a light emitting diode 1, and an electronic circuit 3 for driving the light emitting diode 1, wherein the electronic circuit 3 is a constant current generator configured to supply a constant driving current to the light emitting diode 1 in the range of 0.5 to 25 ?A. Furthermore, the present invention provides a setting device for setting at least one calibration point for a calibration device as described above. The setting device comprises a light detector 51 configured to output a signal representing the light emission intensity of a calibration device under examination, a controller 53 for controlling the constant driving current of the calibration device under examination, and a calibration point setting means 55 for setting at least one calibration point for the calibration device under examination.

Abstract: A vacuum filtration head (1) having a receptacle for a support (2) for a membrane filter (3) for microbiological testing of a liquid substance to be drawn from an upstream side of the membrane filter (3) to a downstream side of the membrane filter (3) through the membrane filter (3), or the support (2) for such membrane filter (1), a drain chamber (4) located downstream of the support (2) and communicating with a downstream side of the membrane filter (3) receiving the liquid substance passed through the membrane filter (3), and a drain channel (5) communicating with the drain chamber (4) at an opening (9) and communicating with a vacuum. A protective shield (6) is arranged in the filtration head (1) interfering with a fictive direct line connection while retaining a fluid path (7) to the drain channel (5) past the protective shield (6).

Abstract: The present invention provides a calibration device for an optical detector comprising a light emitting diode 1, and an electronic circuit 3 for driving the light emitting diode 1, wherein the electronic circuit 3 is a constant current generator configured to supply a constant driving current to the light emitting diode 1 in the range of 0.5 to 25 ?A. Furthermore, the present invention provides a setting device for setting at least one calibration point for a calibration device as described above. The setting device comprises a light detector 51 configured to output a signal representing the light emission intensity of a calibration device under examination, a controller 53 for controlling the constant driving current of the calibration device under examination, and a calibration point setting means 55 for setting at least one calibration point for the calibration device under examination.

Abstract: A sample preparation device (1) comprising a first chamber (2) containing a membrane support (30) on which a membrane (9) is placed or can be placed, an inlet (20) to the first chamber (2) and an outlet (21) from the first chamber (2), at least one second chamber (3) provided with or adapted to be provided with an anaerobic generation means (23) and/or an anaerobic detection indicator, wherein the at least one second chamber (3) is connected to the first chamber (2) by a communication path (8), wherein the communication path (8) is liquid-tightly closed by a tap device (4) in a first position (A) of the tap device (4) and is adapted to be opened to allow fluid communication between the first chamber (2) and the at least one second chamber (3) in that the tap device (4) is moved to a second position (B) of the tap device (4).

Abstract: A sanitation assembly (1) comprising a first chamber (2) with a first volume (2a) for receiving a first fluid, and a second chamber (3) with a second volume (3a) for receiving a second fluid, wherein the first volume (2a) communicates with an outlet (6) of the assembly (1) via a first valve mechanism (4) configured to allow discharge of the fluid from the first volume (2a) to the outlet (6) at a predefined first opening pressure, wherein the second volume (3a) communicates with the outlet (6) of the assembly (1) via a second valve mechanism (5) configured to allow discharge of the fluid from the second volume (3a) to the outlet (6) at a predefined second opening pressure, and wherein the predefined second opening pressure of the second valve mechanism (5) is higher than the predefined first opening pressure of the first valve mechanism (4).

Abstract: A sample preparation device (1) comprising a first chamber (2) containing a membrane support (30) on which a membrane (9) is placed or can be placed, an inlet (20) to the first chamber (2) and an outlet (21) from the first chamber (2), at least one second chamber (3) provided with or adapted to be provided with an anaerobic generation means (23) and/or an anaerobic detection indicator, wherein the at least one second chamber (3) is connected to the first chamber (2) by a communication path (8), wherein the communication path (8) is liquid-tightly closed by a tap device (4) in a first position (A) of the tap device (4) and is adapted to be opened to allow fluid communication between the first chamber (2) and the at least one second chamber (3) in that the tap device (4) is moved to a second position (B) of the tap device (4).