Medium-to-large ﬂow rate measurement
Excellent cost performance
Suitable for various plant and water treatment facilities

W-500
MAG-WHEEL FLOWMETEROUTLINE
The W-500 series is a flowmeter with a wheel for liquids. A magnet
is built into the wheel, and the ﬂow rate is measured by detecting thenumber of rotations of the wheel, which is proportional to the ﬂow rate.
With various materials and functions, the W-500 series can be used
for a wide variety of applications including plant and water treatment
facilities.

FEATURES❑ Either a resin or metal ﬂow tube can be selected.
❑ Local or separate ﬂow indication without power supply, 4 to 20 mA
DC output (2-wire), and pulse output can be selected.
❑ Flow rate range is from 0.7 to 3.5 m3/h (min.) to 50 to 400 m3/h (max.).
❑ Easy reassembling/assembling, cleaning, and maintenance❑ Excellent cost performance

MODEL CODE
W-5Function□
2
55
5Range of ﬂow rate＊
Connection size

Material of ﬂow tube

Connection

Flow direction□1123Model code
□

□□

-□ABC
12345678946V
9FR9RLUDDescription
4 to 20 mA DC output (2-wire)
Local ﬂow indication without power supply
Separate ﬂow indication without power supply
Open collector pulse output
0.7 to 3.5 m3/h
15A（Rc1/2）
1.2 to 6 m3/h
20A（Rc3/4）
1.6 to 8 m3/h
25A（Rc1）
2.5 to 18 m3/h
40A
4 to 25 m3/h
50A
6 to 45 m3/h
65A
10 to 60 m3/h
80A
15 to 100 m3/h
100A
20 to 150 m3/h
125A
30 to 200 m3/h
150A
50 to 400 m3/h
200A
SpecialSUS304 (40 to 200 A type only)
SUS316PVCSpecialFlange connection (Standard: JIS 10K FF)
Rc screw connection (15 to 25 A type only)
SpecialLeft to right (Standard)
Right to left
Bottom to top
Top to bottom

Note : Contact TOKYO KEISO Co., Ltd. for special requirements.
＊ The maximum ﬂow rates listed above can be changed within the range of 60 to 100%. Specify the value when ordering.
Note that the product accuracy (%F.S.) is based on the maximum stream ﬂow shown in the table.
Example : For a product with the code of W-5□□-A□□-□ (ﬂow rate: 0.7 to 3.5 m3/h), its range of ﬂow rate may be changed to 0.7 to
2.1 m3/h. However, its accuracy (%F.S.) is based on the original value of 3.5 m3/h.

TG-ES691-9E
RevisedJun 2016 K
5th edition Aug 2004

W-500 MAG-WHEEL FLOWMETER

STANDARD SPECIFICATIONS･ Measuring liquid: Liquids without solids(Viscosity: Less than 2 mPa･s)･ Fluid pressure: Max. 0.7 MPa (Test pressure: 1.0 MPa)･ Fluid temperature: 0 to 80 ｡C (PVC ﬂow tube: 0 to 60 ｡C)･ Ambient temperature : 5 to 60 ｡C･ Installation: Horizontal or vertical (The process linemust be full and the shaft of the wheel
must be horizontal.)･ Construction: Waterproof (Equivalent to IP65)

Pressure loss
Model codeW-5□□-A□□-□
W-5□□-B□□-□
W-5□□-C□□-□
W-5□□-1□□-□
W-5□□-2□□-□W-5□□-3□□-□W-5□□-4□□-□W-5□□-5□□-□W-5□□-6□□-□W-5□□-7□□-□W-5□□-8□□-□

W-521 (4 to 20 mA DC output, 2-wire)･ Output･ Power supply･ Load resistance･ Accuracy: 4 to 20 mA DC output (2-wire): 24 V DC ±10 %: Max. 500 Ω: ±3 % F.S. (15 to 25 A type)±2 % F.S. (40 to 200 A type)･ Electric connection : G1/2 (M3.5 screw connection)･ Cable: CVV(S) 2c (recommended)(customer's scope)

Max. pressure loss (kPa)
44443434.5
333

W-552 (Separate ﬂow indication without power supply)･ Accuracy: ±4 % F.S.
･ Electric connection : G1/2 (M3.5 screw connection)･ Cable: Max. 10 m from detector to indicator
CVVS 2c 1.25 mm2 (recommended)(customer's scope)

W-553 (Open collector pulse output)

W-551 (Local ﬂow indication without power supply)･ Accuracy: ±4 % F.S.
Note : When installing the product in the locations subject tovibration, use model W-552 preferably whose indicator
is installed separately.

･ Output: Open collector pulse output(Unscaled pulse)･ Power supply: 10 to 26 V DC, 23 mA･ Rated load
: Max. 26 V DC, 12 mA･ Accuracy: ±3 % F.S. (15 to 25 A type)±2 % F.S. (40 to 200 A type)･ Electric connection : G1/2 (M3.5 screw connection)･ Cable: CVV(S) 3c (recommended)(customer's scope)

CONSTRUCTION AND DIMENSIONS
Terminal housing

Terminal housing
Detecting partNut

Detecting part

FlangeWheel (with magnet)
Wheel holder

Wheel (with magnet)
O-ringWheel holder

Shaft

O-ringO-ringFlow tube

Shaft

Knock pin
FlangeBolt

Bolt
Flow tube

15A to 25A type

40A to 200A type

Materials
Name
Flow tube, ﬂange
Wheel
Bearing (built-in)
Shaft

Material
See MODEL CODE
PPS (Magnet molded)
Glass-containing PTFE
Quartz glass

Name
Wheel holder
O-ringTerminal housing
Bolt, nut

Material
PPS
NBR
AC2A
SS400

Contact TOKYO KEISO Co., Ltd. for special requirements.
2TOKYO KEISO CO., LTD.

TG-ES691-9E

W-500 MAG-WHEEL FLOWMETER

60
53.5

W-521 / W-552 Detector / W-553
60(H)

G1/2(H)

G1/2(218)

23

53.5

60
53.5

66

G1/2A2-Rc

□60

140

LRc screw connection (15 to 25 A)

LFlange connection (15 to 25 A)

Flange connection (40 to 200 A)

W-552 Indicator
(90)
(57)

78
38

FLOW RATEMAG WHEEL FLOWMETER

The terminal block of W-521, W-552, the detector andindicator, and W-553 are in the front side of the terminal
housing.
Remove the cover of the terminal housing for wiring.

107135120

Terminal
housing
TOKYO KEISO CO.,LTD.
JAPAN

G1/295
110

54-φ5.5（Mounting holefor the panel）

W-551
(66)

(66)
FLOW RATE(66)

MAG WHEEL FLOWMETERTOKYO KEISO CO.,LTD.
JAPAN40

FLOW RATE

(H)

73(H)

MAG WHEEL FLOWMETERFLOW RATE(218)

MAG WHEEL FLOWMETERTOKYO KEISO CO.,LTD.
JAPANTOKYO KEISO CO.,LTD.
JAPANA

2-Rc□60

Rc screw connection (15 to 25 A)

Rc screw connection
Connection size
1/2"
3/4"
1"

TG-ES691-9E

LL

Flange connection (15 to 25 A)

Flange connection (40 to 200 A)

140A
(mm)
323030Mass (kg)(approx.)1.5
1.5
1.5Flange connection (Flow tube: SUS)
Connection size
15A
20A
25A
40A
50A
65A
80A
100A
125A
150A
200A

L(mm)

250

H(mm)
186
188
188
235
237
245
247
265
284
295
320

Mass (kg)(approx.)
5.5
67811
15
17
20
23
2739

Flange connection (Flow path body: PVC)
Connection size
15A
20A
25A
40A
50A
65A
80A
100A
125A
150A
200A

L(mm)
180
190
200
295
330
340
355
445
590
710
500

H(mm)
186
188
188301
305
313
319
353
341
355
350

Mass (kg)(approx.)
1.5
1.5
2
3
3.5
4568
911TOKYO KEISO CO., LTD.

3W-500 MAG-WHEEL FLOWMETER

WIRING≪W-521≫≪W-552≫

Terminal block

Power supply

M3.5（24 V DC）

Terminal block of
the detector M3.5

≪W-553≫
Terminal block of
the indicator M3.5

Terminal block M3.5

（＋）

11

OUT

Notused

22

Vcc

3

3

COM

（−）

（＋）Receiving（−）

meter（4 to 20 mA DC）

（＋）
（＋）
（−）

Pulse
Power supply output（10 to 26 V DC）

Terminal 2 is not used.

FLOW DIRECTION AND ARRANGEMENT
W-551

W-521 / W-552 Detector / W-553

For the vertical installation of the W-551, thedisplay panel can be arranged on the rightside. Specify when ordering.

G1/2
FLOW RATEMAG WHEEL FLOWMETERTOKYO KEISO CO.,LTD.
JAPANFLOW RATEMAG WHEEL FLOWMETERTOKYO KEISO CO.,LTD.
JAPANG1/2

Horizontal(left to right, right to left)

Vertical(bottom to top, top to bottom)

Horizontal(left to right, right to left)

Vertical(bottom to top, top to bottom)

NOTES❑ Do not place a signal cable along with other power lines.
❑ The detector must be full with the measuring liquid. Keep out air from around the wheel during measurement.
❑ Straight runs of 20 D on the upstream side and 5 D on the downstream side are recommended for accurate measurements. If they are
not available, install a ﬂow strainer upstream of the detector.
(D: inner diameter of pipe)❑ Mag-wheel ﬂowmeters are not suitable for high-viscosity liquids and/or liquids containing solids or ﬁbers.
❑ The W-551 and W-552 (local ﬂow indication without power supply) should be installed in a place without vibration. If necessary, add
rubber cushions against vibration.

* Specification is subject to change without notice.

Head Office : Shiba Toho Building, 1 – 7 – 24 Shibakoen, Minato-ku, Tokyo 105 – 8558
Tel : +81-3 – 3431 – 1625 (KEY) ; Fax : +81-3 – 3433 – 4922
e-mail : overseas.sales@tokyokeiso.co.jp ; URL : http://www.tokyokeiso.co.jp
4TG-ES691-9E