Adapter device for a sensor device, adapter arrangement, adapter system, measuring device having adapter device and sensor device, and method

An adapter device for attaching a sensor device having a first sensor part and a second sensor part to a pharmaceutical fluid conduit that has a direction of extension, the adapter device comprising a first adapter part and a second adapter part, the first adapter part comprising or forming a first sensor receptacle for the first sensor part and the second adapter part comprising or forming a second sensor receptacle for the second sensor part, the adapter parts being directly or indirectly interconnectable, and also a fluid conduit receptacle which is arranged between the adapter parts or is formed by the adapter parts and which is designed to receive the fluid conduit, the first sensor receptacle being arranged on a side of the first adapter part facing away from the fluid conduit receptacle and the second sensor receptacle being arranged on a side of the second adapter part facing away from the fluid conduit receptacle, a respective through-opening being formed on the first sensor receptacle and on the second sensor receptacle, and a respective contact element of the first sensor part and of the second sensor part engaging in the respective through-opening or extending therethrough for direct abutment against the fluid conduit in a planar manner.