> For the complete documentation index, see [llms.txt](https://docs.quant-aq.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.quant-aq.com/hardware/modulair.md).
# MODULAIR
In April 2025, QuantAQ began shipping new MODULAIR systems that are slightly different than previous versions. Newer MODULAIR systems have serial numbers that begin with **"MOD-X"** and start at serial number MOD-X-00890. If your serial number is lower than 890 a*nd* the serial number starts with **"MOD-",** please use the product manual for the original MODULAIR.
MODULAIR
Original QuantAQ MODULAIR systems with serial numbers below 890.
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