# What is the difference between ULTRAOX SC, ST and CO?

They share the same PSA oxygen generators and differ in how the air is compressed and where the plant is housed.

ULTRAOX SC uses oil-less ULTRACECO compressors. ULTRAOX ST uses ULTRASCREW rotary screw compressors. ULTRAOX CO is a complete plant built inside a shipping container, for sites with no technical room or no space for civil works. ULTRAOX treats the air before the PSA with a water separator with electronic drain, micro and sub-micro filters and an activated carbon filter.

## Sources

- [Ultra Controlo, Medical gas answers: ULTRAOX SC and ST datasheets; ULTRAOX datasheet 2022, p. 16 and p. 19.](https://www.ultracontrolo.com/medical-gas-answers#ultraox-sc-st-co)
- [ultracontrolo.com: ULTRAOX SC](https://www.ultracontrolo.com/products/ultraox)
- [ultracontrolo.com: ULTRAOX ST](https://www.ultracontrolo.com/products/ultraox-st)

Reviewed: 2026-10-22. Ultra Controlo engineering. https://library.ultracontrolo.com/answers/ultraox-sc-st-co/