The QVM62.1 records the air velocity as a measured value and converts it to an active DC 0...10 V output signal. Three measuring ranges are available: 0...5 m/s, 0...10 m/s, and 0...15 m/s. The sensor measures a point, i.e., it measures the values at a specific location in the flow profile. For recording the mean air velocity in the duct, the sensor’s immersion depth is the key measure. The immersion depth depends on the flow profile.