KDG / KDF-9 - Micro Flow Meter and Switch

Brand: KOBOLD Instruments, Inc

KOBOLD KDG/KDF-9 compact micro flow meters with switches operate on the variable-area, or rotameter, float principle and are designed for the measurement of very low gas and liquid flows. 

Flow can be set exactly within the measuring range using the integral precision metering valve. 

All ranges on this rotameter can be optionally fitted with 1 adjustable inductive proximity switch which may be configured to identify certain flow conditions. 

Two flow switch types are available: 1.) Monostable: Switch activates momentarily as the stainless steel float passes by upon rising or falling flow or 2.) Bistable: Switch activates as the stainless steel float rises and remains active until the float falls past the switch on decreasing flow. 

All micro flow meters with a flow switch require the addition of a suitable external, NAMUR relay for operation.
  • Integral Flow Control Valve
  • Easy to Read Scale
  • Compact Design
  • Direct Reading Scales for Water and Air
  • Switching for Low Flows of Liquids and Gases
  • Certificates/Approvals: ATEX


Available Measuring Ranges

  • 0.02-0.25 L/hr to 10-100 L/h
  • 2-20 Nl/h to 300-3000 Nl/h


  • 1/4” NPT Thread
  • Hose Connection


  • Glass
  • FPM Seals
  • FFKM Seals
  • Stainless Steel

Maximum Pressure

  • 230 psig

Maximum Media Temperature

  • 212° F
  • 158° F with Switch

Media Categories

  • Liquid
  • Gas


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