Patent ID: 7869028

Claim:
An apparatus for the electromagnetic spectrum or optical analysis of a material to be analyzed that is located in a product space for the photometric, spectrophotometric or image analysis of powder, bulk material, and granules, with a measuring probe which is arranged in a housing, with at least one radiation or light measuring element, a measuring window which is arranged in a path of rays in a wall of the housing, and with at least one detection element for the analysis, the measuring probe being formed and guided displaceably in a guide in an axial direction in such a way that at least part of the housing in which the measuring window is located enters through an opening into the product space in which the material to be analyzed is located, for the analysis, wherein at least one measuring window is arranged in at least one subregion of a circumferential wall of the housing, and that the same measuring window is used in reflection for the detection element, and a sealing cap is located between a front end face of the housing and the measuring window arranged in the circumferential wall, which sealing cap is at least partially still in the region of the opening in the product space, and consequently covers the opening, in a retracted position of the measuring probe in which the measuring window is outside the product space, wherein reference and/or test elements are arranged in the guide.