Thermal Gas Mass Flow Meter
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℃ |
|
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 |
|
|
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 |
|
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:
 |
 |
 |
 |
 |
 |
