Hach US9003 Manual Del Usuario página 8

Figure 4 US9001 sensor installation
1 Maximum distance
Figure 5 US9003 sensor installation
1 Minimum distance to reflecting obstruction
Installation setup
From the bottom of the sensor, the ultrasonic signal expands as it moves away from the sensor.
Install the sensor so that the ultrasonic signal does not hit the walls of the pipe or the top of the
channel.
8 English
2 Minimum distance
2 Distance from sensor, 0 to 382.91 cm (0.00 to
150.75 in.) maximum