Thermal Mass Flow Meter

Multi-flow unit:Volume flow,Mass flow
Dual power supply:DC 24V,AC220 V
Probe material:SUS304
Min.flow velocity:0.1Nm/s
Flow range ratio:1:1000
Accuracy:±1.0%

Category:

Description

Product description

Thermal gas mass flow meter is divided into Pipe-line and Insertion,according to installation instructure.And be used for measuring gas such as Air,Oxygen,Methane,Natural gas and other mixture gas, except acetylene and humid gas.

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Working principle

Thermal gas mass flow meter is designed based on thermal diffusion and adopt principle of constant temperature difference to meaure gas.

Application industry

Blast furnace gas,Coke oven gas measurement.

Flue gas measurement.

Aeration and chlorine from biogas and water treatment.

Compressed air measurement.

Natural gas, LPG gas, flare gas.

Primary and secondary air flow measurement of power plant blast furnace.

Flow measurement of mine ventilation or exhaust system.

Smoke from the chimney.

Application field:

Oil and gas industry

Power industry,

Chemical industry,

Metallurgy industry,

Pulp and paper industry,

Food and pharmaceutical industry,

Environmental protection.

Product feature:

Widly flow range ratio:1:1000

Easy to install and maintain

Digital display

With RS485 or HART communication

Better seismic performance,long service life

Multi-point flow measurement

Leak detection

Measuring flow directly and don’t need temperature and pressure compensation

Flow and temperature are detected at the same time, switch display

Technical parameter

Media:All gas except acetylene and humid gas

Measure range:1:1000

Sesnsor working temperature:-20~220℃

Transmitter working temperature:-20~45℃

Output:4-20mA

Accuracy:±1.0%~±2.5%

Probe material:SS316L

Power supply:24VDC ,220VAC

Response time:1S

Display:4 line digital

Technical Parameters

Thermal Gas Flowmeter Product 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
Common use gas maximum range
aliber

( mm )

Air Nitrogen ( N2 ) Oxygen ( O) 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
Thermal gas flowmeter selection table
Model QTMF X X X X X X X
Caliber DN15-DN4000
Structure Compact C
Remote R
Senor type Insertion I
Flange F
Clamp C
Screw S
Material SS304 304
SS316 316
Pressure 1.6Mpa 1.6
2.5Mpa 2.5
4.0Mpa 4.0
Teperature -40-200℃ T1
-40-450℃ T2
Power Supply AC85~250V AC
DC24~36V DC
Signal Output 4-20mA+Pulse+RS485 RS
4-20mA+Pulse+HART HT

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