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The VA40 is a glass tube variable area (VA) flowmeter designed for measuring flow of liquids and gases. This all-purpose flowmeter is suitable for basic applications up to +100°C / +212°F and max. 10 bar / 145 psi. Typical applications include flow measurement of flushing, purging, or inert gases, as well as heating and cooling circuits.


  • Simple, low-cost measuring principle without auxiliary power.

  • Direct reading of the flow and observation of the medium.

  • Optional MIN/MAX flow switches (SIL 2 conform acc. to IEC 61508-2) or 4…20mA output for recording and control.

  • Full scale value for liquids: 0.4…10,000 l/h / 0.1…2,650 GPH.

  • Full scale value for gases: 7…310,000 l/h / 0.25…11,000 SCFH.

  • Maximum measuring error: ±1% (acc. to VDI/VDE 3513-2) or ±1% of full scale.

  • Turndown ratio 10:1.

  • Suitable for use in hazardous areas.

  • Suitable for use in Safety Instrumented Systems (SIS) with SIL 2; in redundant design (1oo2), also suitable for SIL 3 applications (type A device).

  • Available as food and pharmaceutical variant with FDA compliant materials.

VA40

Variable Area Flowmeter for Basic Applications

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