The electronic part controls all mechanical components and communicates with the software of the data logger. Most of the individual electronic components used for Spiritum can be purchased inexpensively.
![](https://spiritum.ait.co.at/wp-content/uploads/2021/05/20210504_090813-j-3.jpg)
The electronic mounting plate integrated
Three identical sensors (SFM3300-250-D from Sensirion Inc.) are used:
- In the blower branch (Fblower),
- in the O2 branch (FO2) and
- in the expiration branch (Fexp).
![](https://spiritum.ait.co.at/wp-content/uploads/2021/05/electronic-mounting-plate-kl.png)
Plug-in module with electronic components
Here we use type CF sensors XGZP6847 (0-40kPa) with digital interface (I²C).
A safety relief valve (APL-valve) is installed before the outlet in the inspiration branch.
The oxygen content of the ventilation air is measured after the ambient air and O2 have been combined with a combined O2-humidity sensor (NRC International GmbH oxygen sensor D01-N).
Pressure measurements are taken:
- between blower and V.insp (pblower)
- in the inspiration branch (pinsp)
- in the expiration branch before V.exp.