DFA400 Rev150730
13
Figure 4.  Saddle Clamp Installation
Note: Allow a minimum of 
2 inches clearance above the 
sensor for connector removal/
installation.
Note: When the retainer cap is 
tightened make sure the ow 
sensor engages the alignment 
tab and does not rotate.
Note: Dimensions are typical and are an aid to 
determine ow sensor mounting locations.
Pipe Size  Dimensions
(Sch 40)   A  B  C
  2    5.5  3.9  2.9
  2.5    5.5  3.9  2.8
  3    5.9  3.9  2.8
  3.5    6.8  4.3  2.8
  4    6.8  4.3  2.8
  5    8  4.3  2.8
Measurements are in inches.
A
C
B
Retainer 
Cap
O-Ring
Paddlewheel 
Flow Sensor
Sensor 
Housing
Saddle 
Clamp
Alignment 
Tab