Karman Vortex Type Water Flow Rate Sensor Flurex WFK2 Series
Caution
- The product images are representative only. Specifications may vary by part number, including shape and color.
Product Description
[Features]
· Compatible with flow rate 0.4 to 250 L/min
· Equipped with water temperature measurement function as standard on all models
· Flow rate control with manual valve available (option)
· Compatible with warm water up to 95°C
· The LCD display can be rotated 90° at a time without moving the main body
· Easy-to-read dual-screen color LCD display
· IO-Link model
Drawing
· WFK2-005, 020, 050
· WFK2-100, 250
Product Specification
Product Specification
| Items | WFK2-005 | WFK2-020 | WFK2-050 | WFK2-100 | WFK2-250 | ||
|---|---|---|---|---|---|---|---|
| Connection | Connection port diameter Rc, G, NPT | 3/8, 1/2, 3/4 | 1, 1 1/4, 1 1/2 | ||||
| Connection component material | Stainless steel: SUS304 | ||||||
| Usage conditions | Compatible fluid | Fresh water, industrial water | |||||
| Maximum operating pressure MPa | 1.0 | ||||||
| Pressure resistance MPa | 1.5 | ||||||
| Manual valve internal leakage mL/min | 0 | No manual valve setting | |||||
| Manual valve allowable back pressure MPa | 0.3 | No manual valve setting | |||||
| Ambient temperature°C | 0 to 50 (85% RH or less, no condensation) | ||||||
| Fluid temperature°C | 1 to 95 | ||||||
| Flow Rate | Flow rate range L/min | 0.4 to 5 | 1.6 to 20 | 4 to 50 | 8 to 100 | 20 to 250 | |
| Repeatability (*1) | Analog accuracy: ±2.5%F.S. Display accuracy: ±2.5%F.S. ±1 digit (minimum display unit) | ||||||
| Temperature Characteristics (*1) | ±5%F.S. (reference at 25°C, 10 to 50°C) | ||||||
| Low Flow Cut | 5% of F.S. | ||||||
| Accumulated Flow Rate Range | 99999 L or 99999 m3 (unit selection available) Resets when the power is turned off. | ||||||
| Accumulated Pulse Rate L/pulse | 0.1, 0.5, 1 | 0.1, 0.5, 1, 10 | 0.5, 1, 10, 50 | 1, 10, 50, 100 | 10, 50, 100 | ||
| Pressure loss MPa | 0.07 (at F.S.) | 0.05 (at F.S.) | 0.05 (at F.S.) | 0.05 (at F.S.) | 0.03 (at F.S.) | ||
| Response time (note 2) sec | 0.25, 0.5, 1, 5, 10 (initial value: 1) | ||||||
| Temperature | Measurement temperature range°C | 0 to 100 | |||||
| Accuracy | Below 50: analog accuracy ±2, display accuracy ±2±1 digit (minimum display unit 1) | ||||||
| 50 to 100: analog accuracy ±3, display accuracy ±3±1 digit (minimum display unit 1) | |||||||
| Output | Display | Dual-screen LCD display Instantaneous flow rate: 3 digits Water temperature: 2 digits Accumulated flow rate: 5 digits Rotating screen available | |||||
| Analog output (note 3) | Standard: DC0 to 5 V / 1 to 5 V Option: DC4 to 20 mA, DC0 to 10 V / 1 to 10 V | ||||||
| Switch output | NPN or PNP transistor open collector output (switchable by setting) | ||||||
| Switch output | Maximum load current | 50 mA | |||||
| Maximum applied voltage | DC30V | ||||||
| Internal voltage drop | 2.0 V or less | ||||||
| Power supply voltage | Analog output standard: DC12 to 24 V ±10% Analog output option: 24 V DC ±10% | ||||||
| Current consumption (note 4) | 50 mA or less | ||||||
| Mounting | Mounting posture | Vertical / Horizontal Mounting | |||||
| Straight pipe at inlet | Not Included | IN side: 10D OUT side: 5D | |||||
| Protective Structure | Equivalent to IP65 | ||||||
| Weight g | 3/8 (Rc, G, NPT): approx. 320 1/2 (Rc, G, NPT): approx. 320 3/4 (Rc, G, NPT): approx. 400 | 1 (Rc, G, NPT): approx. 870 1 1/4 (Rc, G, NPT): approx. 1,010 1 1/2 (Rc, G, NPT): approx. 1,100 | |||||
Note 1: The accuracy is the average value over 10 seconds (under conditions without bubbles). Also, F.S. refers to the full-scale flow rate.
Note 2: The time required to reach 70% of the original output when the flow rate is instantly reduced to zero from the steady (operating) flow rate.
Note 3: For allowable load, please refer to the wiring method page.
Note 4: This is the current when connected to 24 V DC with no load connected. Please note that the current consumption varies depending on the load connection status.
Pressure Loss
WFK2-005
WFK2-020
WFK2-050
WFK2-100
WFK2-250
Internal structure drawing and list
| Product number | Part name | Material | Quantity | |
|---|---|---|---|---|
| 1 | Seal | FKM | Fluoroelastomer | 1 or 2 |
| 2 | O-ring | FKM | Fluoroelastomer | 2 |
| 3 | Temperature sensor | SUS316L | Thermistor | 1 |
| 4 | Karman vortex detection sensor | PPS resin | Piezoelectric element | 1 |
| 5 | Attachment | SUS304 | 2 | |
| 6 | Sensor body | PPS resin GF40% | 1 | |
| Product number | Part name | Material | Quantity | |
|---|---|---|---|---|
| 7 | LCD | - | 1 | |
| 8 | CPU board | - | 1 | |
| 9 | Sensor board | - | 1 | |
| 10 | O-ring | FKM | Fluoroelastomer | 2 |
| 11 | Bracket (option) | SUS304 or SPCC | (1) | |
· WFK2-005,020,050****A
| Product number | Part name | Material | Quantity | |
|---|---|---|---|---|
| 1 | Handle | POM resin | 1 | |
| 2 | O-ring | FKM | Fluoroelastomer | 1 |
| 3 | Stuffing | PPS resin GF40% | 1 | |
| 4 | Spacer | SUS304 | 1 | |
| 5 | O-ring | FKM | Fluoroelastomer | 1 |
| 6 | Cock body | PPS resin GF40% | 1 | |
| Product number | Part name | Material | Quantity | |
|---|---|---|---|---|
| 7 | O-ring | FKM | Fluoroelastomer | 2 |
| 8 | Cock | PPS resin GF40% | 1 | |
| FKM | Fluoroelastomer | |||
| 9 | Attachment | SUS304 | 2 | |
| 10 | Exterior case | PBT resin GF30% | 1 | |
Specifications Table
| Part number | A | B | C | Width across flats D |
|---|---|---|---|---|
| WFK2- [*1] A [*3] **N | 90 | 15 | Rc3/8 | 24 |
| WFK2- [*1] B [*3] **N | 90 | 15 | Rc1/2 | 27 |
| WFK2- [*1] C [*3] **N | 106 | 23 | Rc3/4 | 32 |
| WFK2- [*2] D [*3] **N | 106 | 20 | Rc1 | 46 |
| WFK2- [*2] E [*3] **N | 125 | 29.5 | Rc1 1/4 | 50 |
| WFK2- [*2] F [*3] **N | 132 | 33 | Rc1 1/2 | 55 |
| WFK2- [*1] A [*3] **A | 151 | 15 | Rc3/8 | 24 |
| WFK2- [*1] B [*3] **A | 151 | 15 | Rc1/2 | 27 |
| WFK2- [*1] C [*3] **A | 167 | 23 | Rc3/4 | 32 |
[*1] Select from 005, 020, or 050
[*2] Select from 100 or 250
[*3] Select from A, G, or N (The external dimensions are the same for G thread and NPT thread.)