ACU for CLARIOstar

Full flexibility for all your cell-based assays

The Atmospheric Control Unit (ACU) for the CLARIOstar microplate reader is the ideal solution for cell-based applications, from standard cell growth to hypoxic assays or pH control. The ACU provides a complete solution to fully regulate and independently control both O2 and CO2 gas levels within the microplate reader chamber. From standard cell growth to hypoxic or cytotoxicity assays, the ACU provides the optimal environment for any live cell assay.

Unique gas ramping feature

As a unique feature within plate readers, the CLARIOstar with ACU offers the capability to run O2 and CO2 gas ramps. For instance, the ACU can deprive O2 and then rapidly re-oxygenate back to physiological conditions, keeping meanwhile steady CO2 levels. This capability enhances live cell-based assays, as disease models such as ischaemia/reperfusion can be reproduced in vitro in a microplate reader.

In combination with the temperature control, the shaking options, and bottom reading detection, the ACU provides a versatile ‘walk away’ solution for long term cell-based assays.


  • O2 control range: 0.1 - 20%
  • CO2 control range: 0.1 - 20%
  • LCD touchscreen with intuitive user interface
  • Gas concentration curve display
  • Up to 10 user-definable presets
  • Superior valve control for minimal gas consumption
  • Integrated gas pressure regulators and sensors with acoustic alarm
  • Altitude correction for accurate gas regulation