- Overview
- Product Description
- Products Specifications
- How To Order
- Main Diensions
- Product Category
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- About Us
- FAQ
Basic Info.
Packaging & Delivery
Product Description
1. PF3W is a digital flow sensor that constantly monitors water or coolant flow.
3. Two outputs are available, including two switch signals, or a switch and analog signal.
4. Options include a mounting bracket, flow adjustment valve, and temperature sensor to monitor flow and temperature simultaneously.
5. PF3W is grease-free, IP65 rated, and C-UL-US, CE and RoHS compliant.
Product Feature
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).
| 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. (25ºC 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 50ºC (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.
Flow Rate/Analog output
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.
Flow Rate/Analog Output
(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 |
Ordering Code PF3W Series 3-Color Display Digital Flow Switch for Water
PF3W7 04 - Nil1 03 - AT Nil2 - M Nil3
| 7→ Type | 7: Integrated display | ||||||
| 04→ Flow rate range | Symbol | 4 | 20 | 40 | 11 | 21 | |
| Rated flow rate | 0.5 to 4L/min | 2 to 16L/min | 5 to 40L/min | 10 to 100L/min | 50 to 250L/min(With metal piping) | 50 to 250L/min(With PVC piping) | |
| Nil1→ Thread type | Nil: Rc | N: NPT | F: G | ||||
| 03→ Port size | Symbol | Port size | Rated flow rate | ||||
| 4 | 20 | 40 | 11 | 21 | |||
| 03 | 3/8 | √ | √ | - | - | - | |
| 04 | 1/2 | - | √ | √ | - | - | |
| 05 | 3/4 | - | - | √ | √ | - | |
| 10 | 1/1 | - | - | - | √ | - | |
| 12 | 1 1/4 | - | - | - | - | √ | |
| 14 | 1 1/2 | - | - | - | - | √ | |
| 25 | 25A | - | - | - | √ | - | |
| 30 | 30A | - | - | - | - | √ | |
| AT→ Output specifications/Temperature sensor | Symbol | OUT1 | OUT2 | Temperature sensor | |||
| Flow rate | Flow rate | Temperature | |||||
| A | NPN | NPN | - | None | |||
| B | PNP | PNP | - | ||||
| C | NPN | Analog 1 to 5V | - | ||||
| D | NPN | Analog 4 to 20mA | - | ||||
| E | PNP | Analog 1 to 5V | - | ||||
| F | PNP | Analog 4 to 20mA | - | ||||
| AT | NPN | (NPN)⇄NPN | With temperature sensor | ||||
| CT | NPN | (Analog 1 to 5V)⇄Analog 1 to 5V | |||||
| DT | NPN | (Analog 4 to 20mA)⇄Analog 4 to 20mA | |||||
| Nil2→ Lead wire (Option) | Nil: With lead wire with M8 connector (3 m) | ||||||
| N: Without lead wire with M8 connector | |||||||
| M→ Unit | Symbol | Instantaneous flow | Accumulated flow | Temperature | |||
| M | L/min | L | ºC | ||||
| Nil3→ Bracket | Symbol | Bracket type | Rated flow rate | ||||
| 4 | 20 | 40 | 11 | 21 | |||
| Nil | None | √ | √ | √ | √ | √ | |
| R | With bracket | √ | √ | √ | √ | - | |
Order Example:
2 NPN switch outputs, port size Rc3/8, with temperature sensor.
Model: NPF3W704-03-AT-M
Packaging type:
| VPC Box | White Box | Color Box | VPC Carton | Pallet |
Delivery time:
| conventional products | customized products | specially customized products |
| on the day of payment | 10 workdays | 25 workdays. |
Payment term:
| Paypal | TT | Western Union | DP | LC | Money Gram | Online Bank | Alibaba credit order | Pay later | DA |
| YES | YES | YES | NO | NO | YES | YES | YES | YES | YES |
Transportation:
Express (DHL, UPS, TNT, JCEX, FEDEX) is available.
Sea and Air transports are available.
The most suitable transport way will be chosen for you.
