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Thermal Gas Mass Flow Meter

Thermal gas mass flowmeter is designed based on the principle of thermal diffusion. This instrument uses the constant temperature difference method to accurately measure the gas.
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Description SELECTION CRITERIA INSTALLATION AND USE FIELD INSTALLATION

Thermal gas mass flow meter is designed on the basis of thermal dispersion, and adopts method of constant differential temperature to measuring gas flow. It has advantages of small size, easy installation, high reliability and high accuracy, etc.

 

Description

Specifications

Measuring Medium

Various gases (Except the acetylene)

Pipe Size

DN10~DN4000mm

Velocity

0.1~100 Nm/s

Accuracy

±1~2.5%

Working Temperature

Sensor: -40℃~+220℃

Transmitter: -20℃~+45℃

Working Pressure

Insertion Sensor: medium pressure≤ 1.6MPa

Flanged Sensor: medium pressure≤ 1.6MPa

Special pressure please contact us

Power Supply

Compact type: 24VDC or 220VAC, Power consumption ≤18W

Remote type: 220VAC, Power consumption ≤19W

Response Time

1s

Output

4-20mA (optoelectronic isolation, maximum load 500Ω), Pulse, RS485 (optoelectronic isolation) and HART

Alarm Output

1-2 line Relay, Normally Open state, 10A/220V/AC or 5A/30V/DC

Sensor Type

Standard Insertion, Hot-tapped Insertion and Flanged

Construction

Compact and Remote

Pipe Material

Carbon steel, stainless steel, plastic, etc

Display

4 lines LCD

Mass flow, Volume flow in standard condition, Flow totalizer, Date and Time, Working time, and Velocity, etc.

Protection Class

IP65

Sensor Housing Material

Stainless steel (316)

 

Dimensions of standard insertion sensor

DN

A

B

DN65-DN350

560

340

DN400 -DN500

640

425

DN600-DN1000

820

600

PN1.6Mpa Plane and surface plate flat welding steel pipe flanges (Unit: mm)

Nominal Diameter

Flange Outer diameter

Center Hole

Screw Hole

Screw Thread

Sealing Face

Flange Thickness

Pipeline Length

DN

D

k

n×L

d

f

C

L

15

95

65

4×14

M12

46

2

14

250

20

105

75

4×14

M12

56

2

16

250

25

115

85

4×14

M12

65

2

16

250

32

140

100

4×18

M16

76

2

18

250

40

150

110

4×18

M16

84

2

18

250

50

165

125

4×18

M16

99

2

20

280

65

185

145

4×18

M16

118

2

20

280

80

200

160

8×18

M16

132

2

20

280

100

220

180

8×18

M16

156

2

22

280

1. The flange adopts the national standard GB / T9119-2000 standard. And in accordance with GB / T9119-2000 standard processing and production.
2. For DN15 ~ DN80, pipe thread connection can be used, but it can be implemented only after reaching technical consultation with the instrument provider.
3. Only the highest rated pressure data of 1.6Mpa is given in the table. Those higher than the rated pressure can be customized, but it can only be implemented after reaching technical consultation with the instrument provider.
4. DN100 or larger pipe section installation dimensions can only be produced after consultation with the instrument supplier.

1. Install the instrument away from elbows, obstacles, reducers, and valves to ensure a stable flow field. One side requires a long upper straight pipe. The length of the front straight pipe is greater than 10D, and the length of the rear straight pipe is greater than 5D. The figure below shows the length of straight pipe required for several situations often encountered on site: 
                                                          The direction of the fluid in the following figure is: from right to left

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