Judd Communications Depth Sensor, Analog Version
INSTALLATION
When mounting the sensor pay careful attention to the cone of the ultrasonic beam. The beam width is 22
degrees which means that the diameter of the beam will be 39% of the distance to the target, as shown in
Figure 1. This means that after traveling 10 meters the beam diameter will be 3.9 meters. In this example
the sensor would need to be mounted at least half the distance of the beam diameter, or 1.95 meters, away
from the mast. Be careful to avoid obstructed beam paths.
To determine the minimum distance the sensor must be mounted away from the mast use this formula:
Crossarm length = .194 x Height
Depth Sensor Beam Width Examples
Perpendicular to Surface
The JC Depth Sensor must
be mounted perpendicular
to the target surface.
Mounting the sensor at an
angle will result in erratic
and unreliable
measurements.
22 Deg.
Incorrect, obstruction in beam
22 Deg.
Incorrect, mast in beam
Diameter
22 Deg.
Height
Correct, unobstructed path
Right
Wrong!