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Product Specification
1. 3-color/2-screen display.
2. Integrated display type, Separate monitor type, and PVC piping type.
3. Reduced required piping space.
4. Rotatable display: Counterclockwise 90°, Clockwise 225°. Display can be rotated in increments of 45° to suit the installation conditions.
5. Easy operation, improved visibility. New model PF3W721-14- -M. (Flow rate set from 20-350L/min).
Order Example
2 NPN switch outputs, port size Rc3/8, with temperature sensor.
Model: NPF3W704-03-AT-M
Product Description
| Model | PF3W704 | PF3W720 | PF3W740 | PF3W711 | PF2A721 | |
| Working medium | Water and ethylene glycol aqueous solution (with viscosity of 3MPa·s [3 cP] or less) | |||||
| Detection type | Karman vortex | |||||
| Rated flow range | 0.5 to 4L/min | 2 to 16L/min | 5 to 40L/min | 10 to 100L/min | 50 to 250L/min | |
| Display flow range*1) | 0.35 to 5.5L/min | 1.7 to 22L/min | 3.5 to 55L/min | 7 to 140L/min | 20 to 350L/min | |
| Set flow range | 0.35 to 5.5L/min | 1.7 to 22L/min | 3.5 to 55L/min | 7 to 140L/min | 20 to 350L/min | |
| Smallest settable increment | 0.01L/min | 0.1L/min | 1L/min | 2L/min | ||
Conversion of accumulated pulse (Pulse width: 50ms) | 0.05L/pulse | 0.1L/pulse | 0.5L/pulse | 1L/pulse | 2L/pulse | |
Fluid temperature (No freezing or condensation) | 0 to 90°C | 0 to 70°C | ||||
| Display unit | Instantaneous flow: L/min, Accumulated flow: L | |||||
| Accuracy | Display value: ±3% F.S. Analog output: ±3% F.S. | |||||
| Repeatability | ±2.0% F.S.*2) | |||||
| Temperature characteristics | ±5.0% F.S. (25℃ reference) | |||||
| Operating pressure | 0 to 1MPa | |||||
| Proof pressure | 1.5MPa | |||||
| Pressure loss | 20kPa (at maximum flow rate) | |||||
Pressure loss (Without flow adjustment valve) | 45 kPa or less at the max. flow | 60 kPa or less at the max. flow | ||||
| Accumulated flow range*3) | 0 to 9,999,999,999L | 999,999,999L | ||||
| By 0.1L | By 0.5L | By 1L | ||||
| Pressure characteristics | ±1.5% F.S. (0.1 to 1.5 MPa, 0.7 MPa reference) | |||||
| Switch output | Nil | NPN open collector output | ||||
| Max. load current | 80mA | |||||
| Max. applied voltage | DC 28V | |||||
| Internal voltage drop | NPN: 1V or less, PNP: 1.5V or less (at load current of 80 mA) | |||||
| Response time*2,4) | 0.5s/1s/2s | |||||
| Output protection | Short-circuit protection | |||||
Flow rate output mode | Select from Hysteresis, Window comparator, Accumulated output, or Accumulated pulse output modes | |||||
Temperature output mode | Select from Hysteresis mode or Window comparator mode | |||||
| Analog output | Response time*5） | 0.5s/1s/2s (linked with the switch output) | ||||
| Voltage output | Output voltage: 1 to 5V Output impedance: 1 kΩ | |||||
| Current output | Output current: 4 to 20 mA Max. load impedance: 300 Ω for DC 12V, 600 Ω for DC 24V | |||||
| Hysteresis | Variable | |||||
| External input | Voltage free input: 0.4V or less (Reed or Solid state), input for 30ms or longer | |||||
| Display method | 2-screen display (Main screen: 4-digit, 7-segment, 2-color, Red/Green Sub screen: 6-digit, 11-segment, White) | |||||
| Indicator light | Output 1, Output 2: Orange | |||||
| Power supply voltage | DC12 to 24 V ±10% | |||||
| Current consumption | 50 mA or less | |||||
| Environment | Enclosure | IP65 | ||||
| Working temperature | 0 to 50℃ (with no freezing and condensation) | |||||
| Working humidity | Operation, Storage: 35 to 85% R.H. (No condensation) | |||||
| Withstand voltage*6) | AC 1000V for 1 minute between terminals and housing | |||||
| Insulation resistance | 50 MΩ or more (DC 500V measured via megohmmeter) between terminals and housing | |||||
| Standards and regulations | CE, RoHS | |||||
| Wetted parts material | PPS, FKM, SCS13, SUS304 | |||||
| Non-grease | ||||||
| Piping port size*7） | 3/8 | 3/8, 1/2 | 1/2, 3/4 | 3/4, 1 | 1 1/4, 1 1/2 | |
*1) When the actual flow rate is less than the minimum display flow range, the display will show "0.00", "0.0" or "0 ".
*2) If 0.5s is selected for the response time of the switch output, the repeatability will be ±3% F.S.
*3) Cleared when the power supply is turned off. The hold function can be selected. (Intervals of 2 or 5 minutes can be selected.) If the 5-minute interval is selected, the life of the memory element (electronic parts) is limited to 1 million times. (If energized for 24 hours, life is calculated as 5 minutes × 1 million = 5 million minutes = about 9.5 years.) Therefore, if using the hold function, calculate the memory life for your operating conditions, and use within this life.
*4) The response time when the set value is 90% in relation to the step input (The response time is 7s when it is output by the temperature sensor.)
*5) The response time until the set value reaches 90% in relation to the step input (The response time is 7s when it is analog output by the temperature sensor.)
*6) When the temperature sensor is used, it will be AC 250V.
*7) When the piping diameter or piping passage is restricted, the specififications may not be satisfified.
*8) 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.
When only optional parts are required, order with the part numbers listed below.
| Description | Part NO. | Qty. | Note | |
| Bracket* | ZS-40-K | 1 | For PF3W704/720 | With 4 tapping screws (3×8) |
| ZS-40-L | 1 | For PF3W740 | With 4 tapping screws (3×8) | |
| ZS-40-M | 1 | For PF3W711 | With 4 tapping screws (4×10) | |
| Lead wire with M8 connector | ZS-40-A | Lead wire length: 3m | ||
* For units with flflow adjustment valve, 2 brackets are required.
(PF3W704/720/740)
| Symbol | A | B | C |
| Voltage output | 1V | 1.5V | 5V |
| Current output | 4mA | 6mA | 20mA |
(PF3W711)
| Symbol | A | B | C |
| Voltage output | 1V | 1.4V | 5V |
| Current output | 4mA | 5.6mA | 20mA |
(PF3W721)
| Symbol | A | B | C |
| Voltage output | 1V | 1.8V | 5V |
| Current output | 4mA | 7.2mA | 20mA |
| Model | Rated flow [L/min] | |
| Mini. | Max. | |
| PF3W704 | 0.5 | 4 |
| PF3W720 | 2 | 16 |
| PF3W740 | 5 | 40 |
| PF3W711 | 10 | 100 |
| PF3W721 | 30 | 250 |
Main Dimensions
Catalogue PDF
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