VA Intelligent Metal Variable Area Flowmeter is produced by our company using the latest technology which is a kind of variable area flow measurement instrument applied in industrial automation process control. It has the advantage of small volume, wide detection range and convenient usage etc and used to measure flow of liquids, gases and steam, especially suitable for medium with low velocity and small flow.

For many years, Metal Tube Variable Area Flowmeter has widely be chosen in petrochemical, steel and iron, electric power, metallurgy, light industry, food, pharmaceutical, water treatment and other industries with its variety of fine performance, good reliability, and better cost performance to be used in measuring liquid, gas and steam of various industries and processing control. 

Unique Features:

  •  Adopts linearization output device patent technology of intelligent metal variable area flowmeter to realize data display linearization.
  • Sensor adopts the low cost HART communication device which based on the SCM and got the national practical new type technology certificate.

General Features:

  • Very suitable to small diameter and low velocity
  • Simple structure, reliable performance, low maintenance and long service life 
  • Low requirements for straight pipe
  • Wide turndown ratio: 10:1 
  • Non contact magnetic coupling system to ensure stable data transmission
  • LCD display for instantaneous flowrate or total flow alternately 
  • HART Communication 
  • Intrinsically safe type and flameproof type available

Features of Variable Area Flowmeter:

  • Low requirements to straight pipe part
  • Broader ratio of flow rate 10:1
  • Two-wire LCD indicator; instant/accumulated display of flow rate are available; backlight option.
  • Single axis and sensitive display
  • Rotation of non-contact magnetic coupling
  • Can be applied to hazardous occasions such as flammable and explosive ones
  • All-metal structure, fit for high temperature, high pressure and mediums with strong erosion.
  • Power supply such as two-wire system, battery, alternating current option
  • Multi-parameters calibration function
  • Function of date recovery, date copy and power-off protection

Technical data of Variable Area Flowmeter:


Measuring range

water ( 20°C) 1- 200000 I/h

Air ( 20°C, 0.1013 Mpa) 003-4000m3/h

Make reference to flow rate sheet, order for special flow rate

Ratio of spans

standard type 10 : 1

special type 20 : 1


standard type class1.5

special type class1.0

Pressure Class

DN15-DN50 4.0MpaDN80 -DN200 1.6Mpa

Special typeDN15-DN50 25MpaDN80 -DN200 16Mpa

Pressure class of clamp cover is 11.6 Mpa

Contact the plant for special type before choosing the type and ordering

Pressure loss


Medium temperature

standard type : -80°C~ + 200°C : PTFE : 0°C~ 85°C

High temperature type : at most 400°C

Medium viscosity

DN 15 : ŋ  < 5mPa.s ( F15.1-F15.3 )

       ŋ  < 30mPa.s ( F15.4-F15.8 )

DN 25 : ŋ  < 250mPa.s

DN 50-DN 150 : ŋ  < 300mPa.s

Ambient temperature

liquid crystal type -30°C~+85°C

Pointer type -40°C~ +120°C

Connection forms

DIN 2510 standard flange

Special type : flange and thread appointed by users of any standard

Cable interface

M20 × 1.5

Power Supply

standard type : 24V DC two-wire 4~20 mA ( 10.8 VDC ~ 36 VDC)

Alarm output

upper limit and lower limit instant flow rate alarm

Standard type: collect electrode open circuit output ( at most 100mA@ 30VDC inner impedance 100Ω)

Special type : relay output ( feeler capacity at most 5A @ 250 VAC )

pulse output

accumulated pulse output, least interval 50 milliseconds

Liquid crystal display

indication range of instant flow rate : 0-50000

Indication range of accumulated flow rate : 0-99999999

Protection class


Explosion-proof symbols

intrinsically safe : Exia IICT3-6

Explosion separation type : ExdIIBT4


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