VKM - All-Metal Viscosity Compensating Flow Meter and Switch

Brand: KOBOLD Instruments, Inc

The KOBOLD VKM flow meters and switches fill an important gap in the high viscosity media measurement arena.

Using KOBOLD’s patented viscosity compensation system, these metal rotameters are essentially insensitive to viscosity and density changes during operation.

This development in flow and measurement control technology has resulted in an extremely versatile device suitable for many applications where standard technologies have been inconsistent or otherwise have failed.
  • Viscosity Compensation to 540 cSt (No Scale Recalibration Necessary)
  • Density Compensation to 30 lb/ft3 (0.48 SG)
  • Direct Reading Scales
  • Installation In Any Position
  • Inline Connections
  • Certifications/Approvals: cCSAus
  • Made in the USA
  • Top Seller
  • Quick Delivery


Measuring/Switching Range

  • 0.03-0.12 to 2-20 GPM


  • 1/4” to 1” NPT Threads


  • Ni-Plated Brass
  • Stainless Steel

Maximum Pressure

  • Brass: 3600 psig
  • Stainless Steel: 5000 psig

Maximum Temperature

  • 212° F
  • 176° F


  • ± 4 % Full Scale

Media Category

  • Liquid


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