Abstract: The present invention relates to a calibratable sensor unit for a reaction vessel, such as for example a fermenter (48), in particular a disposable fermenter, comprising at least one sensor device (14) to be calibrated and at least one compartment (26, 28, 30) containing a calibrating agent, the at least one sensor device and the at least one compartment (26, 28, 30) being accommodated movably relative to one another in a housing (12) that is connected to or can be connected to the reaction vessel (48), wherein the calibrating unit (10) is arranged to calibrate the at least one sensor device (14) by contact with the calibrating agent before chemical and/or physical parameters of a measurement substance are measured with the at least one sensor device (14). According to the invention it is proposed that the sensor device (10) is configured in such a way that the relative movement between the at least one sensor device (14) and the at least one compartment (26, 28, 30) can be carried out irreversibly.

Abstract: The present invention relates to a calibration method of a sensor unit connected to a reaction vessel, wherein the sensor unit comprises at least one sensor device configured to be calibrated, at least one compartment containing a calibrating agent, and a housing. The method comprising inserting a sensitive element of the at least one sensor device into a compartment of the sensor unit containing a calibrating agent, withdrawing the sensitive element from the compartment; inserting the sensitive element into the reaction vessel and locking the sensor device in position, wherein the steps of the method are irreversible.

Abstract: The invention relates to a reaction vessel with a sensor unit. The reaction vessel comprising a reaction space configured to be connected with the sensor unit that comprises at least one sensor device configured to be calibrated, at least one compartment containing a calibrating agent, and a housing. The sensor unit is arranged to calibrate the at least one sensor device by contact with the calibrating agent before chemical or physical parameters of a measurement substance are measured, wherein the at least one sensor device is further configured such that the relative movement between the at least one sensor device and the at least one compartment is irreversible. The at least one sensor device is movable relative to the at least one compartment from an initial position into a measurement readiness position. The reaction vessel and the sensor unit can be sterilised or are sterilised jointly.

Abstract: The present invention relates to a calibratable sensor unit for a reaction vessel, such as for example a fermenter (48), in particular a disposable fermenter, comprising at least one sensor device (14) to be calibrated and at least one compartment (26, 28, 30) containing a calibrating agent, the at least one sensor device and the at least one compartment (26, 28, 30) being accommodated movably relative to one another in a housing (12) that is connected to or can be connected to the reaction vessel (48), wherein the calibrating unit (10) is arranged to calibrate the at least one sensor device (14) by contact with the calibrating agent before chemical and/or physical parameters of a measurement substance are measured with the at least one sensor device (14).