> For the complete documentation index, see [llms.txt](https://knowledge.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.illumina.com/microarray/general/microarray-general-faq-list/000009187.md).

# Can Multiple BeadChip Types Be Scanned in the Same Carrier or iScan Run?

iScan users are not limited to placing the same type of BeadChip in a carrier for scanning. The iScan software allows mixed BeadChip types in the same run and even within the same carrier.

Each BeadChip is scanned separately. During scanning, the barcode on each BeadChip is read, allowing the scanner to identify the BeadChip type and retrieve the appropriate DMAP file from the DMAP repository. The scanner then uses the Sentrix Descriptor File (.sdf file) contained within the DMAP folder to determine the scan parameters and perform the scan.

In summary, because each BeadChip is identified independently through its barcode and scanned using its corresponding DMAP files, multiple BeadChip types can be included in the same carrier and scanned within the same iScan run.

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #9187), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000009187%20-%20Microarray%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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