Assertion: elevator shaft | /r/HasProperty | an air quality sensor
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Source sentences:
text: For example, For example, if a closure element is provided for closing the ventilation opening in the area of which the fan is arranged which supplies air to the elevator shaft, an air quality sensor analyzing the supply air flowing through this ventilation opening into the elevator shaft can be provided, e.g. Upon detection of toxic components or too low an oxygen content, a message to the controller outputs, which then in turn causes the closure element spent in a ventilation opening closing position and the fan is stopped.