Hach 911 User Manual page 47

Distance from Target (in.)
11 (27.9 cm)
12 (30.5 cm)
13 (33.0 cm)
14 (35.6 cm)
15 (38.1 cm)
16 (40.6 cm)
17 (43.2 cm)
18 (45.7 cm)
19 (48.3 cm)
20 (50.8 cm)
21 (53.3 cm)
22 (55.9 cm)
23 (58.4 cm)
24 (61.0 cm)
36 (91.4 cm)
48 (1.2 m)
60 (1.5 m)
72 (1.8 m)
84 (2.1 m)
96 (2.4 m)
108 (2.7 m)
6.1.1.1 Mounting the Ultrasonic Sensor
Table 8 Beam Angle Spread by Distance
Note: To prevent mechanical vibration ensure that the supplied isolation washers are installed as
shown in Figure 24 on page
Several brackets are available for mounting the sensor to a fixed location such as a wall or
floor. See Figure 24 on page 46
Section 8 on page 67. Each bracket utilizes the 1.9 cm (¾ in.) NPT connector on the
sensor to secure the sensor to the bracket. Always level the sensor using a level. The
maximum water level must be below the deadband to ensure accurate readings.
75 KHz Beam Width (in.) w/ Horn
46.
and Figure 25 on page
Sensor Installation
0.96 (2.4 cm)
1.05 (2.67 cm)
1.14 (2.9 cm)
1.2 (3.1 cm)
1.31 (3.3 cm)
1.4 (3.6 cm)
1.5 (3.8 cm)
1.6 (4.0 cm)
1.7 (4.2 cm)
1.75 (4.5 cm)
1.83 (4.6 cm)
1.9 (4.9 cm)
2.0 (5.1 cm)
2.1 (5.3 cm)
3.1 (8.0 cm)
4.2 (10.6 cm)
5.2 (13.3 cm)
6.3 (16.0 cm)
7.3 (18.6 cm)
8.4 (21.3 cm)
9.4 (24.0 cm)
47. For mounting options see
45