For cooling water devices and semiconductor
chillers with excellent cost performance

W-2000 and W-2000NMINI-WHEEL FLOWMETEROUTLINE
W-2000 and W-2000N are the rotary vane type flowmeters suitable forvarious liquid flow measurement. W-2000 has a window through which
operators can watch the rotation of the wheel and the flowing statusof liquids. W-2000N covers wider range of temperature. Made by precision casting, both compact-designed and cost-effective flowmeters
are suitable for the measurement of the various cooling water devicesand semiconductor chillers.
W-2000 series

FEATURES❏ Pulse or current output❏ Visible wheel rotation❏ Covering wide temperature range from -20 to 100℃
❏ Wide variety of material groups to cover many kinds of fluids❏ Easy overhauling, cleaning and maintenance❏ Low price owing to intensive cost down
❏ Complying with RoHS
W-2000N series

STANDARD SPECIFICATION쐌 Measuring fluid쐌 Fluid pressure쐌 Fluid temperature
쐌 Ambient temperature쐌 Flow direction and posture쐌 Construction
쐌 Accuracy: Liquids including water, Fluorinert, Galden, ethylene glycol. The liquid viscosity is 2.0 mPa･s or less.
: Maximum 1.0 MPa: See MODEL CODE table: 5 to 60℃: The pipe line on which flowmeter is installed, is either in horizontal or vertical. For the installation on horizontal
pipe, the wheel shaft must be always in horizontal and flow path (center line of pipe line) must be situated in theupper side of the wheel to fill the wheel chamber fully with liquids. See "FLOW DIRECTION AND POSTURE.": See MODEL CODE table: ± 5 % of F.S. for model W-20 □ 2± 3 % of F.S. for model W-20 □ 3 to W-20 □ 9< W-2000 series >Pulse output type
쐌 Output쐌 Duty쐌 Pulse frequency

쐌 Power supply쐌 Load rating
쐌 Electric connection
쐌 Fluid temperature쐌 Construction
Current output type
쐌 Output쐌 Power supply쐌 Load rating
쐌 Electric connection
쐌 Fluid temperature쐌 Construction<W-2000N series for low and high temperature services>: Open collector pulse (Unscaled): H (Changing depending on flowrate), L (2 ms for reference value): Approximately 75 to 95 Hz (Actualmeasurement value is indicated onproduct name plate): 5 to 18 VDC 12mA
: Maximum 18 VDC 15mA.
: 3 core cable (UL2936) equivalent toAWG25: 5 to 80℃: Protected against dripping water(Equivalent to IP62): 4 to 20 mADC
: 24 VDC ± 10% 50 mA: 500 Ω or less
: 4 core cable (UL2941) equivalent toAWG26: 5 to 60℃: Protected against dripping water(Equivalent to IP62)

Pulse output type
쐌 Output쐌 Duty쐌 Pulse frequency

쐌 Power supply쐌 Load rating
쐌 Electric connection
쐌 Fluid temperature쐌 Construction쐌 Additional specification: Open collector pulse (Unscaled): H (Changing depending on flowrate), L (2 ms for reference value): Approximately 85 to 105 Hz (Actualmeasurement value is indicated onproduct name plate): 5 to 12 VDC 12mA
: Maximum 12 VDC 15mA
: 3 core cable (UL2517) equivalent toAWG24: -20 to 100℃
: Protected against water jets
(Equivalent to IP65): Degrease, Non-water and Conden
sation-free treatment

TG-F1058-0E

MAY 2011K

TG-F1058-1E

AUG 2013K

W-2000 and W-2000N Mini-wheel flowmeter

MODEL CODE
《W-2000 series》
Model code■

W-20■-■■-■■■ ■-1OutputDescription■
Pulse output: Open collector

3

Current output : 4 to 20 mA DC
20.5 to 3 L/min (Flow path nozzle φ3.0)

30.7 to 5 L/min (Flow path nozzle φ4.0)

4

1 to 10 L/min (Flow path nozzle φ6.4)

flow rate5

2 to 20 L/min (Flow path nozzle φ10)

Connection

6

3 to 30 L/min (Flow path nozzle φ12)

size

7

4 to 40 L/min (Flow path nozzle φ14)8

5 to 50 L/min (Flow path nozzle φ16)

Range ofRc 3/8Rc 1/2

6 to 60 L/min (Flow path nozzle φ16)

9RInflow direction

L

Left to Right or Bottom to Top (Wheel on right side against flow path)1

Cable length

Rc 3/4Right to Left or Bottom to Top (Wheel on left side against flow path) (Standard)
1 m (Standard)

22m
N

Material of O-ring

NBR (Nitrile rubber)F

FKM (Fluorocarbon rubber)

E

EPDM (Ethylene propylene rubber)

S

FVMQ (Fluorosilicone rubber)
C

Material of monitoring window *1

Polycarbonate (Standard)

S

Material of wheel, bearing, shaft, and bush
(Indicated as group) *2

SCS14 Blind type (No monitoring)
1Group 1 (Standard)

2Group 2

3Group 30Accessories

NoneA

R3/8 X Rc1/4 Adapter (Overall length 18mm)

Additional specification (Add applicable code numbers
when multiple requirements are involved)

A

Degrease treatment (Standard)

B

Non-water treatment《W-2000N series》
Model code
W-20

1Output

1

□ N-□

2-S

S

5

Description

0
Pulse output: Open collector

2N

0.5 to 3 L/min（Flow path nozzle φ4.0）

3N

0.7 to 5 L/min（Flow path nozzle φ5.7）

Range of4N

1.5 to 15 L/min（Flow path nozzle φ10）

flow rate5N2 to 20 L/min（Flow path nozzle φ11.5）

Connection

6N

3 to 30 L/min（Flow path nozzle φ14）

size

7

N

4 to 40 L/min（Flow path nozzle φ16）

8N

5 to 50 L/min（Flow path nozzle φ18）

9N

6 to 60 L/min（Flow path nozzle φ18）

Inflow direction

RRc3/4

Left to Right or Bottom to Top (Wheel on right side against flow path)2

Material of O-ring

2mS

Material of monitoring window
Material of wheel, bearing, shaft, and bush
(Indicated as group)
Accessories

FVMQ (Fluorosilicone rubber)
SSCS145Group 50None

*1

1
0.8
0.6

Monitoring window madeof polycarbonate

0.4

Monitoring window
made of SCS14(No direct monitoring allowed)

0.2
0TOKYO KEISO CO., LTD.

Allowable range of temperature and pressure

1.2
Fluid pressure（MPa）

Materials for monitoring window are determined by temperature andpressure. See allowable range of them in right hand table for which
polycarbonate and stainless steel SCS14 are applicable. You can watch
liquids flowing through the window made of polycarbonate, not through
SCS14.
*2 Select a material group suitable for your service out of the material groupsof the material table in the outline drawings.
Note : Do not hesitate to contact TOKYO KEISO Co., Ltd. for your specificrequirements.

2Rc1/2Right to Left or Bottom to Top (Wheel on left side against flow path) (Standard)

L
Cable length

Rc3/80102030 40 50 60 70 80
Fluid temperature（℃）

90100

TG-F1058-1E

W-2000 and W-2000N Mini-wheel flowmeter

DIMENSION, CONSTRUCTION AND MATERIAL
Model
Material group 1NameNo.
for cooling water
1 WheelPPS (Magnet mold)
Carbon containing PTFE
2 Bearing
Quartz glass
3 Shaft
PTFE
4 BushSCS14
5 Flow path body
6 Monitoring window See MODEL CODE
See MODEL CODE
7 O-ring
SUS316
8 Cover plate
Polycarbonate
9 Cover (Holder)
PVC sheath
10 Cable《W-2000 series》

W-2000 series
W-2000N series
Material group 2Material group 3
Material group 5for non-carbon service for Fluorinert and Galden for Cooling water, Fluorionert and Galden
PPS + Fe (Plastic magnet)
PPS (Magnet mold)
PPS (Magnet mold)
Glass containing PTFE Carbon containing PTFE Carbon containing PTFE
HC-276
Quartz glass
Quartz glassPTFE
Carbon containing PTFE PPS
SCS14
SCS14
See MODEL CODE
SUS316PBT
PVC sheath

（W1）
W2

L

H2510MODELFLOW RATEFREQUENCY
SUPPLY VOLT.
MFG.No.
TOKYO KEISO CO.,LTD.

H14921367

FLOW

8《W-2000N series》
（W1）
W2

L

H2510921367

H3

S/R No.
MODELFLOW RATEFLOWFREQUENCY
SUPPLY VOLT.
TOKYO KEISO CO.,LTD.

H148

W-2000 series
Model
W2
W1
H2
H1
L
Connection size
1951
124155
Rc3/8
2255
14.5
4370
Rc1/2
2257
1749.580
Rc3/4＊：With the window made of polycarbonate

Mass＊
240 g
290 g
380 g

H142.54551.5

H2
1214.5
17W-2000N series
W1H3
4423.34723.34927.3

W2
19.3
22.3
24.3

Mass
330 g
400 g
490 g

PRESSURE LOSS
Pressure loss of W-2000

40

Pressure loss of W-2000N
30・40L/m

153L/min30

5L/min20

10L/min

20L/min
30L/min

40・50L/m
60L/min100

Pressure loss（KPa）

Pressure loss（KPa）

3L/min1015L/min

5L/min
20L/min
50・60L/m

500.1

110
Flow rate（L/min）

TG-F1058-1E

1000.1110100Flow rate（L/min）TOKYO KEISO CO., LTD.

3

W-2000 and W-2000N Mini-wheel flowmeter

WIRINGFollowing schematics show the interconnection for flowmeters. Variety of flow indicators are available in TOKYO KESO Co., Ltd for your applications.

《W-2000N series》《W-2000 series》【Pulse output type】【Pulse output type】

［Red］

［Red］
［White and black］+–

Pulse output+
Power supply– 5 to 18 VDC［White］++–

Power supply
Pulse output– 5 to 12 VDC［Black］［Black］

ShieldShield（Thermal contraction［Blue］）【Current output type】
［Red］

+

［White］ +4 to 20 mADC
output–Power supply
24 VDC［Black］ –［Green］

ShieldNote: In the current output type the minus terminals of power supply
and output are commonly connected. Therefore, use red, whiteand black wires when you connect 3 wire cables for the loopwiring.

FLOW DIRECTION AND POSTURE
Following drawings show how to install flowmeters considering easy gas venting and full liquid flowing inside fowmeters.
○: Recommended△ : Conditionally accepted× : Not accepted○ Horizontal pipe with the shaftof wheel installed horizontallyand liquid flowing lower sidein wheel chamber.

× Horizontal pipe with the shaft ofwheel installed vertically.

× Horizontal pipe with theshaft of wheel installedhorizontally and liquid
flowing upper side in wheel
chamber.

○ Vertical pipe with the shaft of wheel
installed horizontally and liquid
flowing upward (from bottom totop).
△ Vertical pipe with the shaft of wheel
installed horizontally and liquid
flowing downward (from top tobottom).

NOTES❏ Do not put a signal cable along with other power lines.
❏ Inside diameter of process piping and fitting is to be more than that of flow path nozzle.
❏ Installation is to be made at the place free from the influence of external magnetic field which affects the characteristics.
❏ Use this flowmeter where there is no stagnation of air around the wheel and also in the state of water filled up.
❏ Avoid the air blow. Otherwise, the wheel and shaft might be damaged.
❏ The upstream straight runs of more than 10 D (D:inside diameter of pipe) is recommended when uneven or whirling flow is expected.
* 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-F1058-1E