TG-F1153-E00

Mar 2018

1st edition

K

Rw

Tw

Ta

Ra

L O

W

F

Fluid

Gas

(Gas containing more than 10% of hydrogen or

helium, or mixed gas of hydrogen or helium with

CnHm is unsuitable.)

Min. 0 to 2L/min (nor)

Max. 0 to 750m3/h (nor)

1 : 20 (std.)

– 0.07 to 1.0MPa (std.)

0 to 60°C

Within ±0.1% F.S./°C

Scale range

Rangeability

Gas press.

Gas temp.

Temp. change effect

Tube

: SUS316 [Excluding TF-2251T]

SUS304 or SUS316 [TF-2251T]

(SUS304 only as for the flange

connection)

Sensor : Combination of SUS316, Glass,

CTFE and PT

Seal

: FKM or CR

Housing : AC2A

1 sec. for 90%

Response

Material

Waterproof (Equiv. to IP65)

Horizontal or Vertical (

✽)

0 to 60°C

2

× G1/2 (terminal: M3 screw)

DC24V (DC22V to 27V)

Approx. 5.5W

Housing : Munsell N8.5

Stainless body not painted

Finish

Construction

Installation

Ambient temp.

Cable entry

Power supply

Consumption

Press. change effect

Within ±0.1% F.S./0.1MPa

Installation & flow directions: Horizontal and Left to Right (standard) set up

at factory.

INDICATION, TOTALIZATION, 2-POINT ALARM,

DC4 to 20mA AND PULSE OUTPUT BY ONE UNIT

TF-2000T Series

ALL-IN-ONE MINI THERMAL MASS FLOWMETER

OUTLINE

TF-2000T MINI THERMAL MASS FLOWMETER is for the measure-

ment of mass flow rate of various gases without being influenced by

changes in pressure and temperature. TF-2000T has LCD indication

of flow rate and totalization. Also, functions of scaled output pulse

and DC4 to 20 mA are provided. In addition, two point field adjustable

alarm contacts are provided. TF-2000T can be operated by DC24V

power supply. As mentioned above, one unit provides all necessary

functions for flow measurement. Full function and wide Line-up of

TF-2000T cover various applications.

FEATURES

❏ Wide range of process connection

Rc 1/4" screw to 3" flanges are available. They are useful with the

extensive use in general process, air conditioning and gas supply

line etc.

❏ Simultaneous indication of flow rate and totalization

Large size, two line LCD is provided!

❏ Output of current, Pulse and Alarm functions are provided.

Remote indication, batch processing and safety operations are

achieved by one unit.

❏ Up to six kinds of gas and scale range can be chosen

Up to 6 different gases and scale ranges can be preset using keys.

❏ Mass flow measurement

Flow measurement is not influence of the change in pressure and

temperature.

STANDARD SPECIFICATION

❏ Excellent in durability

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

❏ Low pressure drop

Low pressure drop type is about 2kPa at max. flow

❏ High speed response

90% response within a second and also corresponding to batch

processing and total flow rate control

❏ Stabilization of Flow rate display and current output

By setting up a filter coefficient, flow display and current output

can be stabilized.

❏ Loop check function

Operation of equipment can be checked in the condition without

flowing gas.

OPERATION PRINCIPLE

Temperature detection sensor Ra and velocity detection sensor Rw

are installed in the gas flow path of TF-2000T MINI THERMAL MASS

FLOWMETER. The internal electronic circuits keep the temperature

gap between Rw (Tw) and Ra (Ta=Gas temp.) constant by supplying

electric current Ι. The transferred heat from Ra to passed gas (RwΙ

2)

is proportional to the mass flow rate of the gas to be measured which

can be calculated from supplied current Ι. The detection of mass

is not influenced by the change in gas pressure and temperature

because it is compensated by the internal software, and finally the

measurement is made, completely independent of any operating

conditions.

The flow rate is calculated from the supplied current Ι and outputted

in the form of electric signal.