Datasheet

4
Flow-rate Characteristics (Pressure Loss)
LFE1 LFE2 LFE3
Operating Pressure Range Stability
Model
Straight piping length
LFE1
LFE2
LFE3
D
11
21
27
5D
55
105
135
[mm]
Straight Piping Length and Accuracy (Reference Value)
[Measurement conditions]
Fluid: Tap water
Pressure: 0.2 MPa
s The smaller the piping size, the more the product
is affected by the straight piping length.
The straight piping length shall be 5 times (5D) or
more of the piping size to achieve the stable
measurement.
∗ Stability indicates the fluctuation width of the display or analogue output.
012345
Straight piping length [cm]
Accuracy change [% F.S.]
Accuracy change
1.1
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 102030405060708090
Fluid temperature [°C]
Pressure [MPa]
When fluids with high temperature are used,
the operating pressure range will be reduced.
Operate within the range mentioned above. The
proof pressure is double the operating pressure
range.
±0
±0.5
±1.0
±1.5
±2.0
±2.5
±3.0
±3.5
±4.0
Response time [s]
Stability [% F.S.]
0.25 0.5 12 5
Operating range
Straight piping
length
[Port size]
LFE1: 3/8 inch
LFE2: 3/4 inch
LFE3: 1 inch
3
2
1
0
0
0.01
0.02
0.03
0.04
0 5 10 15 20
Flow value [L/min]
Pressure loss [MPa]
0
0.01
0.02
0.03
0.04
0 20406080100
Flow value [L/min]
Pressure loss [MPa]
Flow value [L/min]
Pressure loss [MPa]
0
0.005
0.01
0.015
0.02
0 50 100 150 200
3-colour display
Electromagnetic Type Digital Flow Switch Series LFE