Datasheet
Specifications (Remote Sensor Unit)
Note 1) Refer to “Measurable Range for Ethylene Glycol Aqueous Solution” on page 6. Measurement can be performed with a fluid that does not corrode
wetted parts and has viscosity of 3 mPa·s [3 cP] or less. Refer to the list of applicable fluids on page 24.
Note 2) Operating pressure range and proof pressure change according to the fluid temperature. Refer to the graphs below.
Note 3) The response time until the set value reaches 90% in relation to the step input.
Note 4) Refer to “Wetted Parts Construction” on page 14 for details.
Model
PF3W511
Applicable fluid
Detection method
Rated flow range
Fluid temperature
Accuracy
Repeatability
Temperature characteristics
Operating pressure range
Note 2)
Proof pressure
Note 2)
Pressure loss
Analog output
Indicator light
Power supply voltage
Current consumption
Environment
Standards and regulations
Wetted parts material
Note 4)
Piping port size
Weight
Response time
Note 3)
Voltage output
Current output
Enclosure
Operating temperature range
Operating humidity range
Withstand voltage
Insulation resistance
Without lead wire with connector
With lead wire with connector
Water and ethylene glycol aqueous solution (with viscosity of 3 mPa·s [3 cP] or less)
Note 1)
Karman vortex
0 to 70C (with no freezing and condensation)
3% F.S.
2% F.S.
5% F.S. (25C reference)
0 to 1 MPa
Note 2)
1 MPa
45 kPa or less at the maximum flow
1 s
Voltage output: 1 to 5 V Output impedance: 1 k
Output current: 4 to 20 mA Max. load impedance: 300 for 12 VDC, 600 for 24 VDC
For power supply status, flow rate indicator (Blinking speed changes in response to flow rate), and other error indicator
12 to 24 VDC 10%
30 mA or less
IP65
0 to 50C (with no freezing and condensation)
Operation, Storage: 35 to 85% R.H. (with no condensation)
1000 VAC for 1 minute between terminals and housing
50 M or more (500 VDC measured via megohmmeter) between terminals and housing
CE marking, UL (CSA), RoHS
PPS, FKM, CPVC
Non-grease
Flow-rate Characteristics (Pressure Loss)
Straight piping
length
• Fluid pressure has almost no effect.
• To maintain 3% F.S. in the specificatioins,
use a straight pipe that is 11 cm or longer in
length.
Straight Piping Length and Accuracy (Reference Value)
0 20 40 60 80 100
0.04
0.03
0.02
0.01
0
Pressure loss [MPa]
Flow rate [L/min]
PF3W711/511
0 50 100 150 200 250
0.04
0.03
0.02
0.01
0
Pressure loss [MPa]
Flow rate [L/min]
PF3W721/521
PF3W711/721/511/521
Accuracy [% F.S.]
10
8
6
4
2
0
Straight piping length [cm]
0
2
4 6 8
10
PF3W721/521-U32
(at 100 L/min)
(at 250 L/min)
PF3W711/511-U25
For measurable range for ethylene glycol aqueous solution
(reference values), refer to page 6.
Refer to page 19 for monitor unit specifications.
PF3W521
30 to 250 L/min
30A
325 g
410 g
10 to 100 L/min
25A
270 g
355 g
Refer to “Handling Precautions for SMC Products” for Flow Switch Precautions and
the Operation Manual in our website for Specific Product Precautions.
Pressure: 0.3 MPa
Piping diameter: 25A, 30A
13
Series PF3W