Flow Master

PRODUCT INFORMATION
Accurate, Stable, Handy Flow Generator
Customized to the specified pressure and flow.
Use as a standard for testing and comparing flowmeters.
•••

Check the sensitivity of flow testers easily and reliably.
Maintains the same flow for a long period of time.
Use as a flow master for measuring deviation flow.
(Test for ventilation and bore diameter of holes)•The value of the tester can be checked by connecting to the CAL portof the tester.
Can be used in Flow Check (C-CHK), (F-CHK) of AF series.
Joints for connecting to the piping available. Easy connection anddisconnection with a plug.
Traceability certificate available upon request.
ISO/IEC17025 calibration available.

••••Accuracy (Difference from therequired flow): Within ±10%
HIGH-side

LOW-side

Customized to the desired flow. Use it as a reference instrument.

R1/2

Ø8R2
R21
R22R3
R31
R32
R4
R41
R42

*1
*2
*3*4

Required flow / Pressure
Flow (b) *1

Test Pressure (c)*2Pressure

R1/4

R1/4
Ø8R1/2
R1/4
Ø8
R1/2
R1/4
Ø8
R1/2b,c

50 mL/min to 3 L/min
100 mL/min to 10 L/min
200 mL/min to 15 L/min
0.3 L/min to 25 L/min
0.5 L/min to 35 L/min
0.5 L/min to 45 L/min
0.5 L/min to 55 L/min
0.5 L/min to 65 L/min
0.5 L/min to 70 L/min
0.5 L/min to 80 L/min

10.1 to 21 kPa
21.1 to 51 kPa
51.1 to 100 kPa
100.1 to 151 kPa
151 to 200 kPa
201 to 250 kPa
251 to 300 kPa
301 to 350 kPa
351 to 400 kPa

Vacuum

FM-2B(a)(b,c)
Example) FM-2B(R2)(50mL/min,100kPa)
a Adapter diameter
HIGH-side
LOW-side
Specification (a)50 mL/min to 3 L/min
100 mL/min to 10 L/min
100 mL/min to 15 L/min
200 mL/min to 5 L/min-1 to -10 kPa-10.1 to -21 kPa-21 to -50 kPa-50 to -89 kPa

1 to 10 kPa

Up to 200 mL/min (in units of 1 mL/min)
Up to 2 L/min (in units of 0.01 L/min)
Beyond that, specify in units of up to 0.1 L/min.
201 to 209 mL/min is outside the standard production range.
2.01 to 2.09 L/min is outside the standard production range.
For less than 200 kPa: In units of 0.1 kPa.
For others: In units of 1 kPa.

For FM-2B, the flow is indicated by the "Conversion Flow".
Conversion Flow
The flow of Flow Master measured and converted when produced. (The flow varies depending on the condition of theenvironment (temperature, atmospheric pressure).)1

FM-2B is a standard flowmeter with a fixed pressure and flow.
Unlike float-type flowmeters, there is no need to determine the flow using a regulator valve, and no trouble such as
damage to the float due to inrush pressure.
Since standard flow rate can be set, it is ideal for accuracy check.

1) Connect to Flow Tester

Flow Tester

CAL side1) When connecting the Flow Master to Flow Tester
Connect the Flow Master to the CAL port.
(*1, *2)*1*2

For mass flow sensor: Port size R1/2
For laminar flow sensor:
10 to 200 mL/min: Port size R1/4
500 mL min or more: Port size R1/2

WORK side2) Connect to Piping

2) When connecting the Flow Master to Piping
Connect as shown.
Attach a shutoff valve in front of the Flow Master. It will always
be possible to test with the Flow Master kept connected.
(Open when in use, Close when not in use)

External Appearance

Specifications

Entire length (mm)

R2112

R21113R22114

R3114

R31115

R32116

R4113

R41114

R42115The contents of this Product Information are as of April 2023. The specifications are subject to change without prior notice.

Cosmo Instruments Co., Ltd.

2974-23 Ishikawa, Hachioji, Tokyo 192-0032 Japan
China: Cosmo (Shanghai) Trading Co., Ltd.
+86-(0)21-6575-6880
Shanghai, Tianjin, Guangzhou, Chongqing, Changchun, and Wuhan
Korea: Cosmo Korea Co., Ltd.
+82-(0)32-623-6961
Taiwan: Taiwan Cosmo Instruments Co., Ltd.
+886-(0)2-2707-3131+60-(0)3-51626677
Malaysia: COSMOWAVE SDN.BHD.
Thailand: Cosmowave Technology Co., Ltd.
+62-(0)21-89328750
Indonesia: Pt. Cosmowave+62-(0)21-42900043
Vietnam: Cosmowave Technology Co.,Ltd.
+84-(0)24-37876085

http://www.cosmo-k.co.jp/
Phone: +81-(0)42-642-1357 Fax: +81-(0)42-646-2439
India: Cosmo Instruments India Pvt. Ltd. Head Office+91-(0)124-421-0946
South Zone Regional Office, Chakan Office, Chennai Office, Gujarat Office
Germany: Cosmo EU Solutions Technology GmbH+49-(0)212-383671-71
USA: Cosmo Solutions Technology, Inc.
+1-248-488-2580
Mexico: Cosmo De Mexico+52 (472) 117-2157
Monterrey Office+52 (81) 1104-2479
Brazil: Tex Equipamentos Eletronicos Ind. Com. Ltda.
+55-(0)11-4591-2825
Australia: Industrial Research Technology Pty. Ltd.
+61-(0)412-176-674

FM-2B-985B1-D2