MIDDLE TO LARGE CONNECTION AND LARGEFLOW RATE MEASUREMENT VERSION

TF-1161 / 1261
MINI THERMAL MASS FLOWMETEROUTLINE
In addition to TF-1000 series Mini Thermal Flowmeter (Large diameterversion), a new flowmeter (Mid to large diameter version) for large
flow rate measurement has been announced.
The precise measurement of mass of the various gases can be madewithout being affected by the change in the operating pressure andtemperature.

FEATURES❏ Lineup of product corresponding to mid to large diameter andlarge flow rate measurement
Available in 25mm (1”) to 80mm (3”). This product can be usedin such wide fields as general process line, air and nitrogen gas
supply line etc.

FULL SCALE AND PRESSURE LOSS

❏ Measurement system
Thermal mass flow measurement can be made without being
influenced by the change in operating pressure and temperature.
❏ Simple and compact structure and easy maintenance❏ Flow conditioner built-in. No straight run is required, and the piping layout can be freely made.
❏ Whole quantity passage detection system, and pressure loss isvery small.

Connection
25mm
32mm
40mm
50mm

❑ Excellent in durability
Excellent durable sensor supported by old know-how is used.

65mm❑ High speed responseHigh speed response - 90% within 1.2 second

STANDARD SPECIFICATIONS

80mm

Full scale
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.

m3/h(nor) Pressure loss* kPa
80
32
160
150
39300
200
38
400
300
32600
500
33
1000
700
35
1500

*Pressure loss (at 1atm, 25˚C) at the time of maximum flow in the maximum range; The rough value of the pressure loss is proportional to theModel

TF-1161, TF-1261

Measuring fluid

Air, Nitrogen

Scale range

Min. 0 to 80m3/h (nor) (25mm)
Max. 0 to 1500m3/h (nor) (80mm)

Gas press.

-0.07 to 1.0MPa

AMB & Gas temp.

0 to 50˚CAccuracy±2.0% F.S. (at 25˚C)

Rangeability

1:20

Temp change effectWithin ±0.1% F.S./ ˚CPress change effectWithin ±0.1% F.S./ 0.1MPa

Response

1.2sec. for 90%

Material

Tube

SUS316 or SUS304

Sensor

SUS316, Glass, PT and CTFE

Seal
Output

FKM
DC4 to 20mA (Load resistance Max.450 ohm)

Power supply

DC24V±10%Power consumption

4WConstruction /Housing material

TF-1161 Indoor use (Non-waterproof) / SPCC
TF-1261 Waterproof (IP65 equivalent) / ADC12Electricconnection

TF-1161 Connector for solderless terminal (Pin type)

Processconnection

ThreadRc (1” to 2”)

FlangeJIS10K (25 to 80mm)

square of flow rate and is in inverse proportion to the pressure.

MODEL CODE
TF-1

——
6—
—
1Construction——2—
Output1 —Full scale ow rate (*) — A B C —Contents
Non-waterproof
Waterproof
DC 4 to 20 mA
Flow rate rating
SUS304 (Available only4for flange connection)
MaterialSUS316 (Available for all
6models)P
Rc thread
Connection rating
FFlange
25 25 mm (1”)
Connection size(*): Full scale ow rate = (AB)×10Cm3/h 32 32 mm (1 1/4”)(nor) 40 40 mm (1 1/2”)(Ex.)
80 m3/h (nor) →800
50 50 mm (2”)
400 m3/h (nor) →401
65 65 mm (2 1/2”)
1500 m3/h (nor) →152
80 80 mm (3”)

TF-1261 M3 screw terminal

TG-F2457-E00
1st edition Jan 2024 K

TF-1161 / 1261 series MINI THERMAL MASS FLOWMETERDIMENSIONSDIMENSION TABLE
TF-1161- ✽ ✽ ✽ -P ✽ ✽(15.3)

TF-1161

TF-1261HeightMass (kg)H1

Thread Flange

HeightMass (kg)

H2

Thread Flange

SizeLøD

25mm

195

5079

2.1

3.8

143

2.5

4.232mm

215

60

87

2.04.3

151

2.4

4.7

40mm

230

65

90

2.1

4.5

154

2.5

4.9

50mm

27075

96

2.8

5.6

160

3.2

65mm

290

104

8.2

168

8.6

80mm

320

111

9.2

175

9.6

MINI-THERMALMASS FLOWMETER

H1

TYPE
MFG. NO.
GASFLOW RATE
L/min(nor)FLOWTOKYO KEISO

øD

2-Rc

L

6.0(15.3)

TF-1161- ✽ ✽ ✽ -F ✽ ✽APPLICATIONMINI-THERMALMASS FLOWMETER

H1TYPE
MFG. NO.
GASFLOW RATE
L/min(nor)4C cable

FLOWTOKYO KEISO

DC24V
DC4 to 20mA

Analog output

UNIT:(nor)

L

L/hHI

m3 /h
L/min

Scaled pulse output

Lm3

LO

H/L alarm output

MODE

TF-1261- ✽ ✽ ✽ -P ✽ ✽TOKYO KEISO

54

AC

G1/2

TM31

H2

TF-1161

CAUTION FOR INSTALLATION
øD

2-RcL

❑ Required straight run at upstream is 10d and Downstream is 5d,
and make use of the piping in the same diameter as the flowmeter. (d: Diameter)

TF-1261- ✽ ✽ ✽ -F ✽ ✽❑ Rc screw connection is to be used for pipe less than Sch.80.
❑ As for the pipe in the different diameter from that of the flowmeter, make it ±1 size after installing the necessary straight run in
the same connection as the flowmeter.

H2❑ Install valves downstream if any.
❑ Before installing the flowmeter onto process piping, flush andclean the whole piping.
❑ Use the shield cable for wiring and do not locate it near to power
supply line etc. to avoid the electric noise.

LORDERING INFORMATION
Specify the following for order or inquiry; Model code, Fluid name,(Note) The external shapes for TF-1□61-□□□-P25 and TF-1□61-Max. Flow rate, Temperature and Pressure.

□□-F25 are a little different from the above-mentioned drawings.

* 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 : https://www.tokyokeiso.co.jp
2TG-F2457-E00