Manual

2540 High Performance Flow Sensor
8
9. K-Factors (Stainless Steel, Wrought Steel & Plastic Pipe)
K-factors are listed in U.S. gallons and in liters. Conversion formulas for other engineering units are
listed below.
• K = 60/A
The K-factor is the number of pulses generated by the 2540 paddlewheel per unit of liquid in a
specifi c pipe size.
To convert multiply
K from: to: K by:
U.S. gallons cubic feet 7.479
U.S. gallons cubic inches 0.00433
U.S. gallons cubic meters 263.85
U.S. gallons pounds of water 0.120
U.S. gallons acre feet 325853
U.S. gallons Imperial gallons 1.201
SCH 5S STAINLESS STEEL PIPE
PER ANSI B36.19
K-Factor K-Factor
PIPE PULSES/ PULSES/
SIZE U.S. GAL LITER
1½ in. 115.1900 30.433
2 in. 71.3960 18.863
2 ½ in. 49.263 13.015
3 in. 32.636 8.622
3 ½ in. 24.537 6.483
4 in. 19.1350 5.055
5 in. 12.4490 3.289
6 in. 8.4602 2.235
8 in. 4.9137 1.298
10 in. 3.1228 0.825
12 in. 2.1772 0.575
14 in. 1.7977 0.475
16 in. 1.3717 0.362
18 in. 1.0855 0.287
20 in. 0.8801 0.233
22 in. 0.7293 0.193
24 in. 0.6141 0.162
XS WROUGHT STEEL PIPE
PER ANSI B36.10
K-Factor K-Factor
PIPE PULSES/ PULSES/
SIZE U.S. GAL LITER
1 ½ in. 161.79 42.745
2 in. 95.713 25.287
2 ½ in. 66.686 17.618
3 in. 42.986 11.357
3 ½ in. 31.983 8.450
4 in. 24.668 6.517
5 in. 15.480 4.090
6 in. 10.691 2.825
8 in. 5.9733 1.578
10 in. 3.6489 0.964
12 in. 2.4548 0.649
14 in. 1.9931 0.527
16 in. 1.4970 0.396
18 in. 1.1727 0.310
20 in. 0.9388 0.248
22 in. 0.7685 0.203
24 in. 0.6446 0.170
SCH 10S STAINLESS STEEL PIPE
PER ANSI B36.19
K-Factor K-Factor
PIPE PULSES/ PULSES/
SIZE U.S. GAL LITER
1½ in. 127.930 33.799
2 in. 76.439 20.195
2 ½ in. 51.946 13.724
3 in. 34.174 9.029
3½ in. 25.571 6.756
4 in. 19.829 5.239
5 in. 12.730 3.363
6 in. 8.5938 2.270
8 in. 5.0062 1.323
10 in. 3.1793 0.840
12 in. 2.1914 0.579
14 in. 1.8147 0.479
16 in. 1.3798 0.365
18 in. 1.0912 0.288
20 in. 0.8855 0.234
22 in. 0.7334 0.194
24 in. 0.6175 0.163
STD WROUGHT STEEL PIPE
PER ANSI B36.10
K-Factor K-Factor
PIPE PULSES/ PULSES/
SIZE U.S. GAL LITER
1 ½ in. 140.030 36.996
2 in. 83.240 21.992
2 ½ in. 59.034 15.597
3 in. 38.674 10.218
3 ½ in. 28.752 7.596
4 in. 22.226 5.872
5 in. 14.061 3.715
6 in. 9.5160 2.514
8 in. 5.4523 1.441
10 in. 3.4507 0.912
12 in. 2.3318 0.616
14 in. 1.9186 0.507
16 in. 1.4483 0.383
18 in. 1.1390 0.301
20 in. 0.9146 0.242
22 in. 0.7506 0.198
24 in. 0.6311 0.167
SCH 40S STAINLESS STEEL PIPE
PER ANSI B36.19
K-Factor K-Factor
PIPE PULSES/ PULSES/
SIZE U.S. GAL LITER
1 ½ in. 140.030 36.996
2 in. 83.240 21.992
2 ½ in. 59.034 15.597
3 in. 38.675 10.218
3 ½ in. 28.752 7.596
4 in. 22.226 5.872
5 in. 14.061 3.715
6 in. 9.5160 2.514
8 in. 5.4523 1.441
10 in. 3.4507 0.912
12 in. 2.3318 0.616
SCH 40 STAINLESS STEEL PIPE
14 in. 1.9556 0.517
16 in. 1.4970 0.396
18 in. 1.1900 0.314
20 in. 0.9577 0.253
24 in. 0.6662 0.176
SCH 40 WROUGHT STEEL PIPE
PER ANSI B36.10
K-Factor K-Factor
PIPE PULSES/ PULSES/
SIZE U.S. GAL LITER
1 ½ in. 140.030 36.996
2 in. 83.240 21.992
2- ½ in. 59.034 15.597
3 in. 38.674 10.218
3 ½ in. 28.752 7.596
4 in. 22.226 5.872
5 in. 14.061 3.715
6 in. 9.5160 2.514
8 in. 5.4523 1.441
10 in. 3.4507 0.912
12 in. 2.3517 0.621
14 in. 1.9556 0.517
16 in. 1.4970 0.396
18 in. 1.1900 0.314
20 in. 0.9577 0.253
24 in. 0.6662 0.176