Small type
sensor
Type : FLW12
Z
method
Z
method
V
method
V
method
Large type
sensor
Type : FLW51
High temperature
sensor
FLW32
: Range noted in specifications
: Range specified with piping material
(FRP, PVC or other plastic materials)
Sensor
8.1 (3) Selection of mounting method
There are two ways for mounting the sensor, the V method and the Z method (See Fig. 8-2).
Fig. 8-2 Mounting method
The Z method should be used in the following cases.
• Where a mounting space is not available. (As shown in the figure above, the mounting dimen-
sion with the Z method is about half of that with the V method).
• When measuring fluid of high turbidity such as sewage.
• When the pipe has a mortar lining.
• When the pipe is old and has a thick accumulation of scale on its inner wall.
Selection standard
For a large size sensor with inside diameter of more than 12 in., the Z method is recom-
mended for mounting.
8.1 (4) Processing of sensor mounting surface
Using thinner and/or sandpaper, remove pitch, rust and unevenness over a width of (L) + 8 in. on
the pipe circumference where the sensor is mounted.
Note) If there is a jute winding on the pipe circumference, remove it and carry out the above
processing.
Sensor
D
Approx. D
V method
Sensor
D
Approx. D/2
Z method
Jute winding
Pipe
1"
2"
4"
8"
12"
16"
40"
120"
240"
Inside diameter (inches)
L + 8"
45