7
Specifications
Model PF2M710 PF2M725 PF2M750 PF2M711
Fluid Applicable fluid∗1Dry air, N2, Ar, CO2(JIS B 8392−1 1.1.2 to 1.6.2, ISO 8573−1 1.1.2 to 1.6.2)
Fluid temperature range 0 to 50°C
Flow
Detection method Thermal type (Bypass flow type)
Rated flow
range
Dry air, N2, Ar 0.1 to 10 L/min0.3 to 25 L/min0.5 to 50 L/min1to 100 L/min
CO20.1 to 5 L/min0.3 to 12.5 L/min0.5 to 25 L/min1to 50 L/min
Set point
range
Instantaneous flow −5 to 105% (For the maximum rated flow rate)
Accumulated flow 0.0 to 99999999.9 L0to 999999999 L
Smallest settable
increment
Instantaneous flow 0.01 L/min0.1 L/min
Accumulated flow 0.1 L1L
Accumulated volume per pulse 0.1 L/pulse 1 L/pulse
Accumulated value hold function∗2Intervals of 2 or 5 minutes can be selected.
Pressure
Rated pressure range∗3−0.07 to 0.75 MPa
Proof pressure 1.0 MPa
Pressure loss Refer to the “Pressure Loss” graph.
Pressure characteristics ±5% F. S. ±1 digit (0.35 MPa standard)
Electrical
Power supply voltage∗412 to 24 VDC ±10%
Current consumption 35 mA or less
Protection Polarity protection
Accuracy
∗5
Display accuracy ±3% F. S. ±1 digit
Analog output accuracy ±3% F. S.
Repeatability ±1% F. S. ±1 digit (±2% F. S. ±1 digit when the digital filter is set to 0.05 s)
Temperature characteristics ±3% F. S. ±1 digit (15 to 35°C: 25°C standard)
±5% F. S. ±1 digit (0 to 50°C: 25°C standard)
Switch
output
Output type NPN/PNP open collector
Output mode Select from Hysteresis, Window comparator, Accumulated output, Accumulated pulse output,
Error output, or Switch output OFF modes.
Switch operation Select from Normal or Reversed output.
Maximum load current 80 mA
Maximum applied voltage28 VDC (NPN only)
Internal voltage drop NPN: 1 V or less (Load current: 80 mA) PNP: 1.5 V or less (Load current: 80 mA)
Response time∗650 ms or less
Delay time∗7Select from 0 to 0.10 s (increment of 0.01 s), 0.1 to 1.0 s (increment of 0.1 s),
1 to 10 s (increment of 1 s), 20 s, 30 s, 40 s, 50 s, or 60 s.
Hysteresis∗8Variable from 0
Protection Short circuit protection
Analog
output∗9
Output type Voltage output: 1 to 5 V (0 to 10 V can be selected)∗10, Current output: 4 to 20 mA
Impedance Voltage output Output impedance: Approx. 1 kΩ
Current output Maximum load impedance: 600 Ωat power supply voltage of 24 V, 300 Ωat power supply voltage of 12 V
Response time∗650 ms ±40%
Display
Reference condition∗11 Select from Standard condition (STD) or Normal condition (NOR).
Display mode Select from Instantaneous flow or Accumulated flow.
Unit∗12
Instantaneous flow
L/min, cfm
Accumulated flow
L, ft3
Display range
Instantaneous flow
−0.5 to 10.5 L/min −1.3 to 26.3 L/min −2.5 to 52.5 L/min −5 to 105 L/min
Zero cut-off range
0 to ±10% F. S. (Select per 1% F. S. for the maximum rated flow rate.)
Accumulated flow
∗13 0.0 to 99999999.9 L0to 999999999 L
Display LCD, Color: Red/Green, 4 digits, 7 segments
Indicator LED LED ON when switch output is ON (OUT1/2: Orange)
Digital filter∗14 Select from 0.05 s, 0.1 s, 0.5 s, 1 s, 2 s, or 5 s.
Environmental
resistance
Enclosure IP40
Withstand voltage1000 VAC for 1 minute between terminals and housing
Insulation resistance 50 MΩor more (500 VDC measured via megohmmeter) between terminals and housing
Operating temperature range Operating: 0 to 50°C, Stored: −10 to 60°C (No condensation or freezing)
Operating humidity range Operating/Stored: 35 to 85% RH (No condensation or freezing)
StandardsCE marking (EMC Directive, RoHS Directive)
Piping∗15 Piping specification C6 (ø6) C8 (ø8)
Piping entry directionStraight
Main materials of parts in contact with fluid PPS, PBT, FKM, Stainless steel 304, Brass (Electroless nickel plating), Si, Au, GE4F
Weight
Body 40 g 48 g
Flow adjustment valve +34 g
Lead wire +35 g
Bracket +20 g
Panel mount adapter +15 g
DIN rail mounting bracket +65 g
∗1 Refer to the “Recommended pneumatic circuit examples” on page 2.
∗2
When using the accumulated value hold function, use the operating conditions to calculate
the product life, and do not exceed it. The maximum access limit of the memory device is 3.7
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 3.7 million = 18.5 million min = 35 years
• 2 min interval: life is calculated as 2 min x 3.7 million = 7.4 million min = 14 years
∗3 Negative pressure indicates the pressure value on the IN side (inlet side).
∗4
When multiple products are installed closely, the upper limit of the power supply voltage is 24 VDC.
∗5 The accuracy value is based on dry air as a fluid. For other fluids, it is a
reference value.
∗6 Value when the digital filter is set at 0.05 s.
∗7 The time from when the instantaneous flow reaches the set value to when the
switch output operates can be set.
∗8 If the flow fluctuates around the set value, the hysteresis must be set to a
value more than the fluctuating width. Otherwise, chattering will occur.
∗9 When using a product with an analog output
∗10
When selecting 0 to 10 V, refer to the analog output graph for the allowable load current.
∗11
Standard condition (STD): 20 [°C], 101.3 [kPa] (Absolute pressure), 65 [% RH]
(The flow rate given in the specifications is the value under standard conditions.)
Normal condition (NOR): 0 [°C], 101.3 [kPa] (Absolute pressure), 0 [% RH]
∗12 Setting is only possible for models with the unit selection function.
∗13 Power value is displayed for accumulated flow. The first 4 digits of the
measurement value are always displayed.
∗14 The time for the digital filter can be set to the sensor input. The response time
indicates when the set value is 90% in relation to the step input.
∗15
Check the precautions for One-touch fitting before use. When the piping condition is
changed, for example due to piping on the back of the product, use a general purpose fitting
(KQL series). Some piping conditions may have negative effects on the flow accuracy.
∗
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.
For flow switch precautions and specific product precautions,
refer to the Operation Manual on the SMC website.
PF2M7 Series
