Dwyer IEFS User Manual
Page 4
Depth Setting.
It is important for accuracy that the sensor
be inserted to the correct depth into the pipe.
1. In Table 1, find Dimension C for your sensor model
and pipe size. Subtract wall thickness of your pipe
(Table 2) to find Dimension D.
2. Measuring from the outside of the pipe to the joint in
the housing, as shown in the diagram, adjust the
sensor to Dimension D and hand-tighten compression
nut.
3. Align the conduit housing with the centerline of the
pipe, as shown. Be sure the arrow on the housing
points in the direction of flow.
4. Check Dimension D one more time.
5. Tighten the compression nut fully.
Page 5
TAbLE 2: PIPE WALL ThICkNESS
TAbLE 1: DIMENSION “C”
NOMINAL PIPE SIzE
3”
4”
6”
8”
10”
12”
14”
16”
18”
20”
24”
30”
36”
10.04
9.93
9.69
9.46
9.22
8.99 8.75
8.52
8.28
8.05
7.58
6.87
6.17
15.04
14.93 14.69 14.46 14.22 13.99 13.75 13.52 13.28 13.05 12.58 11.87 11.17
17.04
16.93 16.69 16.46 16.22 15.99 15.75 15.52 15.28 15.05 14.58 13.87 13.17
21.04
20.93 20.69 20.46 20.22 19.99 19.75 19.52 19.28 19.05 18.58 17.87 17.17
IEFS-0SX
IEFS-0LX
IEFS-1SX
IEFS-1LX
INSTALLATION
Page 4
INSTALLATION
Caution!
Never attempt to remove a flow
sensor when there is pressure in the pipe
unless it is specifically designed for hot
tap installation and removal. Loosen the
compression nut slowly to release any trapped pres-
sure. If fluid sprays out when removing the sensor,
stop turning and depressurize the pipe. Failure to
do so could result in the sensor being thrown from
the pipe, resulting in damage or serious injury.
PROPER DEPTh SETTING
PVC/Steel
Sch. 40
PVC/Steel
Sch. 80
Stainless
Steel (10S)
Stainless
Steel (40S)
Copper Tubing
(Type L)
Copper Tubing
(Type k)
brass Pipe
Duct. Iron
(Class 52)
NOMINAL PIPE SIzE
3”
4”
6”
8”
10”
12”
14”
16”
18”
20”
24”
30”
36”
0.216 0.237 0.280 0.322 0.365 0.406 0.438 0.500 0.562 0.593 0.687
0.300 0.337 0.432 0.500 0.593 0.687 0.750 0.843 0.937 1.031 1.218
0.120 0.120 0.134 0.148 0.165 0.180 0.188 0.188 0.188 0.218 0.250 0.312 0.312
0.216 0.237 0.280 0.322 0.365 0.375 0.375 0.375 0.375 0.375 0.375 0.375 0.375
0.090 0.110 0.140 0.200 0.250 0.280
0.109 0.134 0.192 0.271 0.338 0.405
0.219 0.250 0.250 0.312 0.365 0.375
0.280 0.290 0.310 0.330 0.350 0.370 0.390 0.400 0.410 0.420 0.440 0.470 0.530
strain
relief
FLOW