SR50A Sonic Ranging Sensor
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further the sensor is from the target the more the absolute error
increases. If your application is measuring snow depth in an
area that will likely not exceed 1.25 meters of snow then a
good height to mount the sensor would be 1.75 to 2.0 meters.
Mounting the sensor 4 meters above the ground will result in
the potential for larger snow depth errors.
4.2.1 Reference point
The front grill on the ultrasonic transducer is used for the
reference for the distance values. Because it is difficult to
measure from the grill one can use the outer edge of the plastic
transducer housing see Figure 4. If this edge is used, simply
add 8mm to the measured distance.
Figure 4 Distance from edge of transducer housing to grill
4.3 Mounting Options
There are two standard mounting options supplied for the
SR50A sensor.
The first is the SR50A Mount. This bracket is designed to
mount the SR50A parallel or perpendicular to a pipe. Figure 5
demonstrates the parallel mounting method uses 2 band clamps
to secure the bracket to the pipe. The minimum pipe diameter
is 1.0” (25.4mm) and the maximum diameter is 2.25” (57mm).
Larger band clamps can be used to accommodate larger
diameter pipes.
The perpendicular mounting shown in Figure 6 uses a U-bolt to
clamp to the pipe. The U-bolt is suitable for pipes ranging
from 1” OD to 1
-
7/8” OD.
