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Dwyer Rate-Master VA Flowmeter

Dwyer Rate-Master® Flowmeters are low cost, simple variable area flowmeter.  Utilising traditional technology, Dwyer Rate-Master flowmeters are suitable for both gas and liquid applications. Measurement is via a simple direct reading scale.  This Series consists of 2″ (51 mm), 5″ (127 mm) and 10″ (254 mm) scales that can be panel or surface mounted with optional precision metering valves. These variable area flowmeters are intended for vertical installation with upwards flow.  Within a given Series, the Rate-Master® flowmeter bodies can be instantly interchanged, allowing the piping to remain undisturbed, interchangeability of the ranges, and easy cleaning.


Dwyer Rate-Master VA Flowmeters benefits

  • Direct reading scales eliminate the need for troublesome conversions
  • Stainless steel backbone absorbs piping torque reducing installation damage and cost
  • Shatter-proof polycarbonate allows for long operation life
  • Precision injection moulding around a precision tapered pin enables high repeatability
  • Increased reading accuracy with special integral flow guides that stabilize float movement
  • Scale graduations on both side of the indicating tube allow for instantaneous flow reading saving time


Dwyer Rate-Master VA Flowmeter Specifications

  • Service: Compatible gases and liquids.
  • Wetted Materials: Body: Polycarbonate; O-ring: Neoprene and Buna-N; Metal parts: SS (except for optional brass valve);
    Float: SS, black glass, aluminium, K monel, tungsten carbide depending on range.
  • Temperature Limit: 130°F (54°C).
  • Pressure Limit:100 psi (6.9 bar).
  • Accuracy: RMA: 4%; RMB: 3%; RMC: 2% of FS.
  • Process Connection: RMA: 1/8″; RMB: 1/4″; RMC: 1/2″ female NPT.
  • Weight: RMA: 4 oz (113.4 g); RMB: 13 oz (368.5 g); RMC: 39 oz (1105.6 g).
  • Agency Approvals: Meets the technical requirements of EU Directive 2011/65/EU (RoHS II).
  • CAUTION: Dwyer® Rate-Master® flowmeters are designed to provide satisfactory long term service when used with air, water, or other compatible media. Refer to factory for information on questionable gases or liquids. Caustic solutions, anti-freeze (ethylene glycol) and aromatic solvents should definitely not be used.


Dwyer Rate-Master VA Flowmeter Options

  • Top Mounted Metering Valves – Same precision construction for vacuum applications (RMA models only).
  • Adjustable Pointer Flags – Red lined pointer flags provide quick visual reference to a required flow level. Of clear plastic, they snap into place inside bezel and slide to desired level.
  • Specials – Special ranges, scales, mounting arrangements, etc., are available on special order, or in OEM quantities.


Video: Dwyer Rate-Master Flowmeters


Fluidic are a recognised partner of Dwyer Instruments for Scotland and the North of England.  Our instrumentation engineers are product trained and are able to help with instrument selection.  Please call either office for more information or to discuss your requirements. (Glasgow 0141 641 5920,  Warrington 01925 572401).


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