Air Unit
The Arkeo Air Unit provides precise control of the gas environment used during measurements. It enables real-time adjustment of:
- Gas composition (e.g. O₂ / N₂ ratio)
- Humidity
- Temperature
All parameters are regulated by an embedded real-time controller, ensuring stable and reproducible conditions.
Operating Principle¶
The air unit operates in three main stages:
1. Gas Mixing¶
The system accepts two input gases (e.g. ambient air and pure N₂).
Each inlet is controlled by a regulated valve, allowing the system to mix the gases dynamically. By adjusting the flow ratio, the desired oxygen concentration is achieved.
2. Humidity Control¶
The gas mixture is then directed into a bubbler, where it becomes fully humidified.
To achieve the target humidity level, a portion of the gas is humidified through the bubbler. A second portion bypasses the bubbler (dry gas). The two streams are mixed to reach the desired relative humidity
3. Temperature Control (Optional)¶
An optional heating module can be installed downstream of the gas mixing stage.
This allows the gas temperature to be increased to a defined setpoint before reaching the measurement chamber.
Control System¶
All parameters (gas composition, humidity, temperature) are continuously monitored and adjusted by the internal controller, enabling:
- Fast response to setpoint changes
- Stable long-term operation
- Real-time configuration via software