CAT.No.CBM301E-5

Mass Flowmeter for Gas Service

MFT-B Series

In-line type (standard)
Insertion typePortable typeIn-line type (with built-in flow straightener)

1. Next-generation thermal mass flowmeter:• Fully digital control which does not have a bridge circuit.

2. Sophisticated and user-friendly features:

Actual gas calibration
withhydrogen is possible!

• Simplified communication with USB interface• HART communication feature• Profibus DP communication feature• RS-485 (Modbus) communication feature• Error logging feature (records up to 200 errors of 16 different alarms)• Minimum/Maximum logging feature(records maximum and minimum values of flowrate, fluid temperature and transmitter temperature)• Trend memory feature (records up to 56 hours of flowrate/temperature trends)

3. Improved maintainability:• Retractor unit (option)• Insertion type mass flowmeter can be installed or removed while fluid is flowing• Ideal for a line whose sensor may be tainted or a line cannot stop once it operates

4. Other features:• Wide flow range and high accuracy• Normal flowrate (0°C, 1 atm) can be directly displayed and output without temperature and pressure correction.
• Excellent durability with no moving parts• Low pressure loss

LINEUP
In-line type (standard)

In-line type (with built-in flow straightener)
Ideal for relatively small
diameter and whenstraight pipe length
cannot be secured.

Ideal for when a small
diameter (100 mm or less)is required.

◎Applicable to nominal sizes of 10 mm (however 15 mm
for connection) to 100 mm◎Applicable to nominal sizes of 15 mm to 200 mm◎The required straight pipe length is short, whichsignificantly shorten the straight pipe section.

Insertion typePortable type

Ideal for installation on anexisting pipe and relatively
large diameter

Easy-to-carry andbattery-powered, making it
ideal for use in places where
there is no power source.

◎Can be installed on a large-diameter pipe with low
installation cost
◎Installation of the mounting boss only
(an existing boss can be used)◎Retractor unit (option)◎Measures flowrate by detecting the flow velocity at theinsertion point and setting the pipe cross-sectional area

■ General Specifications (For details, please refer to the General Specification sheet of each model.)DescriptionItem

In-line type (504FTB)
In-line type with built-in flow straightener (534FTB)

Portable type (244□)

Insertion type (454FTB)

Air, nitrogen, oxygen, argon, carbon dioxide, ethane, ethylene, methane, digestion gas, helium, hydrogen(For other gases, please consult OVAL sales office or nearest representative.)

Applicable fluid

Air, nitrogen

Installation

Flanged type

Screw-in type, flanged type

Screw-in type

Nominal size

10 to 100 mm (In-line type)
15 to 200 mm (In-line type with built-in flow straightener)

At least 65 mm

At least 80 mmTemperature range (※1)

−40 to +125℃−40 to +260°C(For high temperature service: −40 to +500°C)−40 to +200°C(For high temperature service: −40 to +500°C)

Maximum operatingpressure

1MPaLess than 1 MPa

Flow velocity/flowrate range

0 to 1560 [m3/h (normal)] (In-line type)
0 to 3630 [m3/h (normal)](In-line type with built-in flow straightener)

0 to 111 [m/s (normal)]

0.1 to 55 [m/s (normal)]AccuracyStandard: ±2% of FS
Calibrated by actual flow: ±2% of RD

Standard: ±2% of FSHigh temperature service: ±3% of FS
Calibrated by actual flow: ±2% of RD

Standard: ±2% of FSOutput

2 analog outputs (flowrate and temperature), pulse output, alarm output

2 analog outputs (flowrate and temperature)

Explosionproof
configuration

Basic explosionproof (Exn): CSA, ATEX, IECEx
Flameproof (Exd): TIIS, CSA, ATEX, IECEx (※2)

Non-explosionproof※1: Actual operating temperature range varies depending on the specifications such as explosionproof.
※2: For the in-line type with built-in flow straightener (534FTB series), TIIS explosionproof models are not available.

The specification as of February, 2022 is stated in this catalog. Specifications and design are subject to change without notice.

3-10-8 Kamiochiai, Shinjuku-ku, Tokyo 161-8508
Phone: +81 3-3360-5121 FAX: +81 3-3365-8605

https://www.oval.co.jp/english
0805 2202‐‐‐‐S