Series RMV Rate-Master Dial Type Flowmeter

Brand: Dwyer Instruments, LLC

The Series RMV Rate-Master® Flowmeters measure higher water flow rates with ±2% of full scale accuracy at an affordable price.

Stocked models are fitted with 1˝ female NPT inlet and outlet; 3/4˝ and 1/2˝ sizes are also available. Install in line, supported by piping or flush panel mount with complete hardware package included.
  • Rugged forged brass housing yields great compatibility and strength, allowing the unit to withstand system pressures to 1000 psig (68.9 bar)
  • Shatter proof construction, unlike glass tube variable area flowmeters, yields long operation life



  • ± 2 % of Full Scale

Flow Rate

  • 0 to 20 gpm Water

Maximum System Pressure

  • psi: 1,000 (bar: 69, kPa: 6,895)


  • Compatible Liquids


  • NIST Traceable Calibration Certificate

NPT Connection

  • 1” NPT Female
  • 1/2” NPT Female
  • 3/4” NPT Female


  • Dial: 4” (100 mm)

Temperature Range

  • -6.7° to 93° C (20° to 200° F)

Wetted Materials

  • 302 Stainless Steel
  • Brass
  • Copper
  • Sintered barium Ferrite

  • Monitor coolant flow through ingot heaters, high-amp switchgear, resistance welders, heat exchangers, compressors, scrubbers.
  • Monitor water consumption to different processes and operations for more efficient operation.
  • Calculate required fill or drain times for tanks, water towers.
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