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Specifications
Model
Applicable fluid *
Fluid
Fluid temperature
Detection method
Rated flow range
Set point range *
Flow
Smallest settable
increment
Accumulated volume per pulse
(Pulse width = 50 ms)
Accumulated value hold function *
Rated pressure range
Proof pressure
Pressure
Pressure loss
Pressure characteristics *
Power supply voltage
Electrical
Current consumption
Protection
Display accuracy *
Analog output accuracy *
Accuracy
Repeatability
Temperature characteristics
Effects of connecting modular products *
Output type
Output mode
Switch operation
Max. load current
Switch output
Max. applied voltage (NPN only)
Internal voltage drop (Residual voltage) NPN output type: 1 V or less (at load current of 80 mA), PNP output type: 2 V or less (at load current of 80 mA)
Response time *
Hysteresis *
8
Protection
Output type
Analog output *
9
Impedance
Response time *
Input type
External input *
12
Input mode
Input time
Reference condition *
Unit *
14
Display range *
Display
Minimum
display unit
Display
Indicator LED
Enclosure
Withstand voltage
Environmental
Insulation resistance
resistance
Operating temperature range
Operating humidity range
Standards
Piping
Piping specification
Main materials of parts in contact with fluid
Length of lead wire with connector
Body
Weight
Lead wire with connector
*1 Air quality grade is JIS B 8392-1:2012 [4:6:-] and ISO 8573-1:2010 [4:6:-].
*2 Set point range will change according to the setting of the zero cut-off function.
*3 When using the accumulated value hold function, use the operating conditions to calculate
the product life, and do not exceed it. The maximum update limit of the memory device is 1.5
million times. If the product is operated 24 hours per day, the product life will be as follows:
· 5 min interval: life is calculated as 5 min x 1.5 million = 7.5 million min = 14.3 years
· 2 min interval: life is calculated as 2 min x 1.5 million = 3 million min = 5.7 years
If the accumulated value external reset is repeatedly used, the product life
will be shorter than the calculated life.
*4 Do not release the OUT side piping port of the product to the atmosphere
without connecting piping. If the product is used with the piping port re-
leased to atmosphere, accuracy may vary.
*5 The value when connecting a product with a port size of 3/8 (PF3A701H) or 1/2 (PF3A702H)
*6 The value when the port size of the modular product is 3/8 (PF3A701H) or
1/2 (PF3A702H) and the product is operated at a supply pressure of 0.5 MPa
*7 The time from when the flow is changed by a step input (when the flow rate
changes from 0 to the maximum value of the rated flow range instantaneously)
until the switch output turns ON (or OFF) when set to be 90% of the rated flow rate
3-Color Display
1
Instantaneous flow
2
Accumulated flow
Instantaneous flow
Accumulated flow
3
4
5
5
6
7
Voltage output
Current output
11
13
Instantaneous flow
Accumulated flow
Instantaneous flow
15
(Flow under 10 L/min is displayed as "0")
Accumulated flow *
16
Instantaneous flow
Accumulated flow
Modular Type
Digital Flow Switch
For flow switch precautions and specific product precautions,
refer to the "Operation Manual" on the SMC website.
PF3A701H
Air, Nitrogen
Thermal type (Bypass flow type)
10 to 1000 L/min
10 to 1050 L/min
0 to 999,999,999,990 L
1 L/min
Select from 10 L/pulse or 100 L/pulse.
Intervals of 2 or 5 minutes can be selected.
0 to 1.0 MPa
Refer to the "Pressure Loss" graph on page 24.
±5.0% F.S. (0 to 1.0 MPa, 0.5 MPa standard)
24 VDC ±10%
150 mA or less
Polarity protection
±3.0% F.S.
±3.0% F.S.
±1.0% F.S.
±5.0% F.S. (Ambient temperature of 0 to 50°C, 25°C standard)
±5.0% F.S.
NPN open collector, PNP open collector
Select from Instantaneous output (Hysteresis mode or Window comparator mode),
Accumulated output, or Accumulated pulse output.
Select from Normal or Reversed output.
Select from 1 s, 2 s, or 5 s.
Variable from 0
Over current protection
Voltage output: 1 to 5 V (0 to 10 V can be selected *
Output impedance: Approx. 1 kΩ
Maximum load impedance: 600 Ω, Minimum load impedance: 50 Ω
Linked to the response time of the switch output
No-voltage input: 0.4 V or less
Select from Accumulated value external reset or Peak/Bottom value reset.
30 ms or longer
Select from Standard conditions or Normal conditions.
L/min, CFM (ft
0 to 1050 L/min
0 to 999,999,999,990 L
1 L/min
LCD, 2-screen display (Main screen/Sub screen)
Main screen: Red/Green, Sub screen: Orange
Main screen: 4 digits, 7 segment, Sub screen: 6 digits, 7 segment
OUT indicator: Red LED is ON when output is ON
1000 VAC for 1 minute between terminals and housing
50 MΩ (500 VDC measured via megohmmeter) between terminals and housing
Operating: 0 to 50°C, Stored: −10 to 60°C (No freezing or condensation)
Operating/Stored: 35 to 85% RH (No condensation)
CE/UKCA marking
Modular (Body size: 30)
Stainless steel 304, Aluminum alloy, PPS, HNBR
[Sensor: Pt, Au, Ni, Fe, Lead glass (exempted from the RoHS application), Al
350 g
*8 If the flow fluctuates around the set value, the width for setting more than
the fluctuating width needs to be set. Otherwise, chattering will occur.
*9 Analog output or external input can be selected by pressing the buttons.
Refer to the graph for analog output.
*10 When selecting 0 to 10 V, refer to the analog output graph for the allowable
load current.
*11 The time from when the flow is changed by a step input (when the flow rate
changes from 0 to the maximum value of the rated flow range instantane-
ously) until the analog output reaches 90% of the rated flow rate
*12 Analog output or external input can be selected by pressing the buttons.
*13 The flow rate given in the specifications is the value under standard
conditions.
*14 Setting is only possible for models with the units selection function.
*15 Display range will change according to the setting of the zero cut-off function.
*16 The accumulated flow display is the upper 6-digit and lower 6-digit (total of
12 digits) display. When the upper digits are displayed, x 10
* Products with tiny scratches, marks, or display color or brightness variations which
do not affect the performance of the product are verified as conforming products.
PF3A7 mH
PF3A702H
0 to 50°C
20 to 2000 L/min
20 to 2100 L/min
2 L/min
10 L
1.5 MPa
80 mA
28 VDC
10
), Current output: 4 to 20 mA
3
/min)
L, ft
3
0 to 2100 L/min
(Flow under 20 L/min is displayed as "0")
2 L/min
10 L
IP65
Modular (Body size: 40)
3 m
400 g
+90 g
Series
O
]
2
3
6
lights up.
18
A
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