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Karman Vortex Type Water Flow Rate Sensor Flurex WFK2 Series (Part Numbers)

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Volume Discount

[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

(i)Caution

The product images are representative only. Specifications may vary by part number, including shape and color.

Part Number

Configured Part Number is shown.

Product Specifications
Part Numbers
Catalog

Drawing

· WFK2-005, 020, 050

Karman vortex type water flow rate sensor Fulex WFK2 series external dimensions figure 1

· WFK2-100, 250

Karman vortex type water flow rate sensor Flurex WFK2 series External Shape Figure 2

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	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)
	Accuracy		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

Karman vortex type water flow rate sensor Flurex WFK2 series Pressure Loss 2

WFK2-020

Karman vortex type water flow rate sensor Flurex WFK2 series Pressure loss 3

WFK2-050

Karman vortex type water flow rate sensor Flurex WFK2 series Pressure loss 4

WFK2-100

Karman vortex type water flow rate sensor Flurex WFK2 series Pressure loss 5

WFK2-250

Internal structure drawing and list

· WFK2-005, 020, 050

Karman vortex type water flow rate sensor Flurex WFK2 series internal structure drawing 1

· WFK2-100, 250

Karman vortex type water flow rate sensor Flurex WFK2 series internal structure drawing 2

Cannot be disassembled

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)

*The wetted parts are (2), (3), (4), (5), (6), and (10).

· WFK2-005,020,050****A

Karman vortex type water flow rate sensor Flurex WFK2 series internal structure drawing 3

Cannot be disassembled

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
8	Cock	FKM	Fluoroelastomer	1
9	Attachment	SUS304		2
10	Exterior case	PBT resin GF30%		1

*The wetted parts are (2), (3), (4), (5), (6), (7), (8), (9), and (10).

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.)

: 30; 60; 90

Part Number
WFK2-005AAEAN
WFK2-020BABAN-A
WFK2-050CABAN-A

Standard Unit Price	Minimum order quantity	Volume Discount	Days to Ship	Flow Rate Range (Max. Value) (L/min)	Output Method	Plumbing Thread Nominal	Number of Output Points	Cable	IO-Link / analog output	Flow Rate Range Details (L/min)
MYR 1,728.80	1 Piece(s)		59 Day(s) or more	[< 10] Less than 10	-	3/8	-	Not Included	E: IO-Link Compatible, DC4 to 20 mA	0.4 to 5
MYR 1,655.75	1 Piece(s)	Available	43 Day(s) or more	[10 < 50] 10 to Less than 50	NPN Open Collector / PNP Open Collector / Analog	1/2	2	Standard cable (M12, 4-core, 3 m) included	B: Switch/analog output type, DC4 to 20 mA	1.6 to 20
MYR 1,655.75	1 Piece(s)	Available	14 Day(s) or more	50 to Less than 100	NPN Open Collector / PNP Open Collector / Analog	3/4	2	Standard cable (M12, 4-core, 3 m) included	B: Switch/analog output type, DC4 to 20 mA	4.0 to 50

Product TOP

Basic Information

Type	Flow rate sensor	Fluid Type	Water	Sensor, Monitor Structure	Integrated shape
Pipe Port Type	Female Thread	Plumbing Thread Type	Rc(R)	Pressure Resistant(MPa)	1.5
Flow Direction	One-way	Body Material	Resin	Bracket	Not Included
Unit specifications	L/min, L, m³, °C	Manual Valve	Sensor only

Configure

3 Part Numbers

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Configure Remaining Specifications

Completed

Specification/Dimensions

type
- WFK2-005
- WFK2-020
- WFK2-050
Clear
Flow Rate Range (Max. Value)(L/min)
- < 10
  - Less than 10
- 10 < 50
  - 10 to Less than 50
- 50 to Less than 100
Clear
Output Method
- NPN Open Collector
- PNP Open Collector
- Analog
Clear
Plumbing Thread Nominal
- 3/8
- 1/2
- 3/4
Clear
Number of Output Points
- 2
Clear
Cable
- Standard cable (M12, 4-core, 3 m) included
- Not Included
Clear
IO-Link / analog output
- B: Switch/analog output type, DC4 to 20 mA
- E: IO-Link Compatible, DC4 to 20 mA
Clear
Flow Rate Range Details(L/min)
- 0.4 to 5
- 1.6 to 20
- 4.0 to 50
Clear

Days to Ship

All

14 Day(s) or Less

43 Day(s) or Less

59 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

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Karman Vortex Type Water Flow Rate Sensor Flurex WFK2 Series (Part Numbers)

(i)Caution

Drawing

Product Specification

Product Specification

Pressure Loss

Internal structure drawing and list

Specifications Table

Basic Information

Configure

Specification/Dimensions

type

Flow Rate Range (Max. Value)(L/min)

Output Method

Plumbing Thread Nominal

Number of Output Points

Cable

IO-Link / analog output

Flow Rate Range Details(L/min)

Days to Ship

Specify Alterations

Additional Products in this Category

Tech Support

Payment Method

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