SENSOR ARRANGEMENT FOR AN APPARATUS FOR ADDITIVE MANUFACTURING, AND APPARATUS THEREFOR, AND MEASURING METHOD ON THE BASIS THEREOF

The invention relates to a sensor arrangement (9) for an apparatus (1) for additive manufacturing of a component (2) in a manufacturing process in which, on a build zone (8) in a process area (3), construction material (13), preferably comprising a metal powder, is solidified by means of irradiation of the construction material (13) using at least one energy beam (AL), the sensor arrangement (9) comprising: - a sensor module (90), designed to detect oxygen molecules in a gas sample (P) penetrating into the sensor module (90) and to generate an electrical sensor signal (S) on the basis of the quantity of oxygen molecules, - a control module (95), designed to determine whether the sensor module (90) is measuring outside a predetermined action range on the basis of a comparison of the sensor signal (S) or of a variable derived from the sensor signal (S) with a predefined limit value (G), and if this is the case, to generate a control signal (SL) designed to initiate a predetermined countermeasure that is intended to change the conditions in the apparatus (1) so that the sensor module (90) measures in the action range (AB) again. The invention furthermore relates to a manufacturing apparatus and to a measuring method with such a sensor arrangement.