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Air mass flow meters insert thermal gas flow meter

Thermal gas flowmeter is mainly used for measuring gas with low flow and the range could reach 1:100,which is btter than gas flowmeter on market and low flow could be measured,the min.flow velocity can reach 0.1Nm/s and Max. velocity reach 100Nm/s
Volume flow /Mass flow

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Introduction

Flange thermal gas mass flow meter is one of kind mass flow meter which is popular in industrial applications is the way they are designed and built. The feature is no moving parts, nearly unobstructed straight through flow path, require no temperature or pressure corrections and retain accuracy over a wide range of flow rates. Straight pipe runs can be reduced by using dual-plate flow conditioning elements and installation is very simple with minimal pipe intrusions.
Flange thermal gas mass flow meter size from DN10~DN2000mm

https://www.qtmeters.com/products/thermal-mass-flow-meter/

Advantages

Flange thermal gas mass flow meter advantanges :
(1)Wide range ratio 1000:1;
(2)Large diameter, low flow rate, negligible pressure loss;
(3)Direct mass flow measurement without temperature and pressure compensation;
(4)Very sensitive for low flow rate measurement;
(5)Easy to design and select, easy to install and use;
(6)Suitable for all kinds of single or mixed gas flow measurement Could measure gas with flow velocity from 100Nm/s to 0.1Nm/s, which can be used for gas leak detection;
(7) The sensor has no moving parts and pressure sensing parts, and is not affected by vibration on the measurement accuracy. It has good seismic performance and high measurement reliability;
(8) No pressure loss or very small pressure loss.
(9) When measuring the gas flow, it is often expressed in the volume flow unit under the standard state, and the medium temperature/pressure change hardly affects the measured value. If the density is constant in the standard state (that is, the composition is unchanged), it is similar to a mass flow meter;
(10) Support multiple communication methods, such as RS485 communication, MODBUS protocol, etc., which can realize factory automation and integration

 

Technical Data

Table 1: Flange Thermal Gas Mass Flow Meter Parameter

Measuring Medium  Various of Gas (Except acetylene)
Pipe Size  (Insert connection) DN50-DN2000mm ,In-line connection(DN10-DN2000mm)
Velocity  0.1-100Nm/s
Accuracy  +/-1~2.5%
Working Temperature  Sensor:-40~+220 degC  Transmitter:-20~+45 degC
Working Pressure  Insertion Sensor:medium pressure ≤1.6Mpa

Flanged Sensor:medium pressure ≤4.0Mpa

Special pressure please double check

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  IP65

Table 2: Flange Thermal Gas Mass Flow Meter Sizing

Nominal Diameter Flange outer diameter Center hole Bolt hole Screw Threads Sealing face Flange thickness Installation length
DN D k n x L d f C L
15 95 65 4×14 M12 46 2 14 280
20 105 75 4×14 M12 56 2 16 280
25 115 85 4×14 M12 65 2 16 280
32 140 100 4×18 M16 76 2 18 350
40 150 110 4×18 M16 84 2 18 350
50 165 125 4×18 M16 99 2 20 350
65 185 145 4×18 M16 118 2 20 400
80 200 160 8×18 M16 132 2 20 400
100 220 180 8×18 M16 156 2 22 500

Table 3: Common Use Gas Maximum Range

Caliber

( mm )

Air Nitrogen ( N2 ) Oxygen ( O2 ) Hydrogen ( H2 )
15 65 65 32 10
25 175 175 89 28
32 290 290 144 45
40 450 450 226 70
50 700 700 352 110
65 1200 1200 600 185
80 1800 1800 900 280
100 2800 2800 1420 470
125 4400 4400 2210 700
150 6300 6300 3200 940
200 10000 10000 5650 1880
250 17000 17000 8830 2820
300 25000 25000 12720 4060
350 45000 45000 22608 5600
400 70000 70000 35325 7200
450 100000 100000 50638 9200
500 135000 135000 69240 11280
600 180000 180000 90432 16300
700 220000 220000 114500 22100
800 280000 280000 141300 29000
900 400000 400000 203480 36500
1000 600000 600000 318000 45000
2000 700000 700000 565200 18500

 

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