Variable area flowmeter for low liquid and gas flows

  • Compact mechanical indicator, optional MIN/MAX switches and needle valve
  • Sturdy metal design: stainless steel or alloy
  • Thread: G14, 14 NPT, etc.
  • -40…+200°C / +392°F, max. 220 barg / 3190 psig

DK32 – Mechanical indicator with horizontal connections

DK32 Variable area flowmeter – Mechanical indicator with horizontal connections

The DK32/34 is a variable area (VA) flowmeter for measuring low flow rates of liquids and gases. The tried and tested meter is particularly suitable for flow monitoring and dosing in gas analyser systems or on purge panels. Due to its robust all-metal design it can also be used in difficult process conditions with temperatures up to +200°C / +392°F or pressures up to 400 barg / 5800 psig. It is available with a metering valve as standard to accurately set the flow value.

The DK32/34 operates without auxiliary power supply. The device just features a local indication with two optional MIN/MAX limit switches (NAMUR) or a reed contact. To provide constant flow rates in case of variable inlet or outlet pressures, the VA meter is also available with flow regulators. It comes with horizontal or vertical process connections for NPT or G thread, flange adapters and many other connection options. The VA meter has various approvals for hazardous areas and is suitable for use in Safety Instrumented Systems (SIS).

Product highlights

  • Simple, low-cost installation: Able to measure and display without auxiliary power supply
  • Purgemeter with 2 optional limit switches for flow monitoring
  • Various stainless steel and alloy sensor materials
  • Optional surface passivation with SilcoNert®2000 for trace-level analysis
  • Ingress protection IP65/66
  • Full scale value for liquids: 1.6...150 l/h / 0.4...40 GPH
  • Full scale value for gases: 16...4,800 l/h / 0.6...170 SCFH
  • Turndown ratio 10:1
  • Accuracy: ±4% (acc. to VDI/VDE 3513, sheet 2)
  • SIL2 compliant for use in Safety Instrumented Systems (SIS)
  • Approved for hazardous areas

Typical applications

Chemical and other process industries

  • Additives (e.g. catalysts, tensides, foam inhibitors, emulsifiers)
  • Acids, bases, phosgene and other chloridic substances, sulphuric substances
  • Condensate and cooling water
  • Nitrogen inertisation of vessels and tanks
  • Sample flow monitoring in gas analysers
  • Gas sparging in liquids

Oil and gas industry

  • Injection skids for corrosion-, scale- and hydrate-inhibitors
  • Nitrogen, flue gases etc.
  • Sample flow monitoring in analyser systems

Machinery and apparatus (OEM industry)

  • Gas seal monitoring for compressors
  • Coolants and cooling water, lubricants, air supply
  • Dry-run prevention of pumps
  • Dosing of chemicals and gases in laboratories and test facilities

Product variants

DK32 Variable area flowmeter – Mechanical indicator with horizontal connections


Variable area flowmeter with horizontal connections

  • No power supply needed
  • Integrated bottom or top needle valve
  • Thread: G14, 14 NPT; flange adapters and other connections
DK34 Variable area flowmeter – Mechanical indicator with vertical connections


Variable area flowmeter with vertical connections

  • No power supply needed
  • Thread: G14, 14 NPT; many other connections

DK32/34 K

Variable area flowmeter with NAMUR limit switches

  • 1 or 2 limit switches (NAMUR)
  • Provides MIN/MAX flow monitoring (SIL2 compliant)
  • Globally approved for use in hazardous areas
  • Up to +150°C / +302°F; Ingress protection: IP65

Download Center

  • Technical datasheets and handbooks
  • Flyers and brochures
  • Certificates and approvals
  • Software and driver
View DK32/DK34 related downloads