For measurement of very minute flow
Alarm contact available

MA-900 Series
MICRO FLOWMETER■ OUTLINE
MA-900 MICRO FLOWMETER is a metal tube variable
area flowmeter which designed for the measurement ofminute, small flow of liquids and gases.
In addition to local indication version, alarm contact isoptionally available.

■ FEATURES● Very minute flow measurement is possible

Full scale of 0.5L/h (water) is possible. Very suitable
for small quantity injection process and other test
processes.
● Compact and light weight
Offers easy assembling onto various equipment● High accuracy
Thanks to newly designed magnet following mechanism, higher accuracy compared to existing version
has been achieved. The scale plate is also designed
for easy observation.
● Covering high temperature and pressure
Max.250°C, 20MPa can be covered.
(Except for very minute flow ranges)● Anti corrosive capability
Besides standard material of stainless steel, special
metallic materials are also available to cover very
corrosive fluids.
● Low pressure loss
Newly designed float reduces pressure loss during
operation.
● Adjustable flow alarm contact
Field adjustable, Hall element type alarm contact canbe optionally provided.

■ MODEL CODE

MA-9Function–––Description

0Local indication

5Flowdirection

1 point alarm added
1

Bottom to Top

2

Bottom to Top side

3

Bottom side to Top side

5Material

Bottom rear to Top rear
–1–5Connection

Standard material
Special material1

Rc 1/42

Rc 3/83

Rc 1/24Rc 3/4

5Rc 1

810AJIS10KFF

915AJIS10KFF

A

20AJIS10KFF

B

25AJIS10KFF

X

Other thread connection

Y

Other flange connection

ZAdditional Function

Other special connection–VU–VL

Alarm Action*Needle valve at outlet
Needle valve at inlet–L

Low alarm–HHigh alarm* : Specify only for Alarm version

TG-F281-8E
RevisedMar 2014 K
2nd edition Dec 1995

MA-900 Series MICRO FLOWMETER■ STANDARD SPECIFICATIONMEASURING OBJECT

Liquids and Gases

Viscosity limit for liquid flow measurement
Meter size

Viscosity (Max.)

3/8

1.0 mPa • s

1/2

2.0 mPa • s

3/4, 1

5.0 mPa • s(Free from solids and particles)

MEASURING RANGE
Liquid measurement(Water)		

Gas measurement(Air, 0°C,1atm)

Min.
0.1 to 0.5
L/hMax.
60 to 600
L/hMeasurement range may differ
depending on the viscosity of liquid.
Min.
Max.

3 to 15
2.2 to 22

L/h (nor)m3/h (nor)PROCESS CONNECTION
STD.											OPTION							FLOW DIRECTION								INSTALLATION		
MATERIAL			APPROX. MASS		

Rc1/4, 3/8, 1/2, 3/4 or 1,
10A, 15A, 20A or 25AJIS10KFF
flangeNPT and other threads, flange otherthan JIS10KFF
Bottom→Top, Bottom→Top side,
Bottom side→Top side,
Bottom rear→Top rearSupported by piping
Refer to MATERIAL CONSTRUCTION
1 kg (Rc1/4 thread)■ MATERIAL CONSTRUCTION

Measurement range may differ
depending on the pressure or
viscosity of liquid.
RANGEABILITY											10 : 1
10 : 2 for versions with full scale
smaller than 5L/h (Water) or
100L/h (nor) (Air).
It may differ depending on theviscosity of liquid.

FLUID TEMP.		

0 to 100°C as standard
TOKYO KEISO will comply with yourrequirement up to 250°C generally as
an option. The maximum temperatureof gas service in the case float is
made of PPS is 150°C, and themaximum temperature of MA-950 is
85°C. Consult our factory about yourrequirement.
Heat-resistant glass is used for up
to 2.9 L/h water or up to 100 L/h(nor) air. In this case, the maximum
fluid temperature is 120°C and themaximum allowable thermal shock is80°C.
Max. 2.94 MPa
High press. 19.6MPa(Subject to flange rating)±3.0%F.S.
The accuracy of glass tube inserted
type is ±5%F.S.

FLUID PRESS.							INDICATION ACCURACY

PAINTING							Munsell 7.5BG4/1.5(Indicator part only)

ALARM CONTACTAVAILABILITY		
1 point (Low or High)SETTING			
Adjustable by moving setting				pointer (within graduation range)
SETTING ACCURACY ±3.0%F.S. (Against flow calibration)DETECTION		Hall element IC
OUTPUT			
Open collector output
RATING			
18 V DC, Max. 15mA
RESET SPAN		
Less than 15%F.S. (Against flow				 calibration)
CONNECTION		
M3 screw terminal
CABLE ENTRY		
G1/2 thread
METER ENCLOSURE
Watertight (Equiv. to IP65)
2TOKYO KEISO CO., LTD.

Material

No.

Part Name

①Body

②

Tapered tube

SUS316 *2③Float

SUS316 *3④Packing

PTFE *4⑤Indicator

ADC12⑥Fittings

SUS304 (STD.) or SUS316 *5

SCS14 or SUS316 *1*1: SUS 316 for 3/8” meter size in case of versions with full scale
smaller than 2.9L/h (Water) or 100L/h (nor) (Air).
*2: Glass tapered tube will be inserted for 3/8” meter size in caseof versions with full scale smaller than 2.9L/h (Water) or 100L/h(nor) (Air) . Allowable thermal shock will be 80°C
*3: PPS resin / Titanium will be used for 1/2" meter size, and PPS
resin / SUS316 will be used for 3/4 and 1" meter sizes in gas
measurement applications.
*4: Packing is not an external pressure part.
*5: Connection fitting material can be selected for flange or elbow.
Specify requirement when ordering.
TG-F281-8E

MA-900 Series MICRO FLOWMETER■ DIMENSIONS● Flow direction : BOTTOM TO TOP, Screw connection● Flow direction : BOTTOM SIDE (or REAR) TO			TOP SIDE (or REAR), Screw connection

L (mm)L (mm)
Full scale
Metersize Water Air
L/h L/h(nor)Full scale

Connection screw size (D)
1/4

3/8

1/2

3/4

1Connection screw size (D)Metersize Water Air
L/h L/h(nor)

L

1/4

A

L

3/8

A

L

1/2

A

L

3/4A

L

1A

3/8

2.9

100

180

160

210

230

230

3/8

2.9100225

19215

232702730032310

38

1/2

29.9

630

180

180160

230

230

1/2

29.9630

225

19235

23220

27300

32

310

38

3/4

300

4900

180

180180160

230

3/4

300

4900 225

19235

23240

27230

32

310

38

1600

22000

200

1801801801601600

22000 245

19235

23

240

27250

32240

38

The male and female socket are attached except the types of L160mm.

A will be 100mm for flange connection version.

● Flow direction : BOTTOM TO TOP, Flange connection● Flow direction : BOTTOM TO TOP, Screw connection,				
Needle valve provided at outlet

L (mm)
Full scaleMetersize Water Air
L/h L/h(nor)
3/8

2.9

100

1/2

29.9630

L (mm)

260
3/4
1300
600

4900
22000

Full scale
Metersize Water Air
L/h L/h(nor)

1/4

3/8

1/2

3/4

1Connection screw size (D)

3/8

2.9

100

240

220

275

290

290

1/2

29.9

630

245

225

250

295

295

3/4

300

4900

245

225

250

260

295

22000

265
280
290

225
260
270

250
240
270

260
275
250

260
275
285

1600

*1
*2
*3

*1: Up to Air 8300L/h (nor)*2: Up to Water 400L/h, Air 11000L/h (nor)*3: Up to Water 600L/h, Air 22000L/h (nor)L (mm) may change. According to the pressure difference before andbehind the valve.

TG-F281-8E

TOKYO KEISO CO., LTD.

3

MA-900 Series MICRO FLOWMETER■ WIRING FOR MA-95■■ ORDERING FORM
Specify the following for order / inquiry ;

Vcc
OUT
PUT

CircutGND
Rating voltage
Open voltage
Output inflow current
AMB. Temp.

Vcc
Vo (off)
Isink
Ta

18V
18V
15mA
–30 to +85°C■ OPTIONSMODEL CODE

MA-9 ■ ■ - ■ ■ - ■ - ■FLUID NAME___________________________DENSITY___________________________VISCOSITY_____ ■

mPa•s ■ _____PRESS.

_____ ■

MPa ■ _____

TEMP.

_____ ■°C

MEASURING RANGE_____ ■ L/h■ L/h (nor) ■ _____

CONNECTION SIZE_____ ■ mm

■ _____■ _____● Needle valve

MAX. (64)Specification
Size

Maximum fluidpressure(MPa)

Fluidtemperature
(˚C)

3/8

3

-15 to +150

CONNECTIONSTANDARD■ Rc■ JIS10KFF ■ _____

MATERIAL■ Standard■ Special (Specify)

FOR ALARM VERSION
Contacrt
Setting point46■ High_____ ■ L/h■ Low■ L/h (nor)■ _____

SPECIAL INSTRUCTION IF ANY; __________________________● Magnet Strainer(75)100

The strainer installed at upOUT
stream eliminates particles inthe fluid.
Select a proper mesh of thefilter adequate for the size ofparticles.
A magnet is molded in the float
and in case ferrous powder areinvolved in the fluid, smoothINmovement of float will not beobtained.
It is recommended to install a Magnet Strainer in upstreamof the line to eliminate the ferrous contents.
SNNSFluid pressure: Max. 1.5 MPa
Fluid temperature: Max. 200˚C
Nominal size
: Rc1/4", 3/8", 1/2"
Filter: 100 mesh/inch		 (Option : Up to 200 mesh/inch)
Material: Body : SCS14
Filter: SUS 304, SUS316* 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-F281-8E