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Series RM Rate-Master® Flowmeter

Polycarbonate, Gas Flow from .1-1800 SCFH, Water Flows to 10 GPM
 

The Dwyer Rate-Master® line of direct reading precision flowmeters incorporates many unique user features at moderate cost. These low cost flowmeters are ideal for general use.

Easy to read design - The direct reading scales eliminate troublesome conversions. The scales are brushed aluminum, coated with epoxy and the graduations are on both sides of the indicating tube. Special integral flow guides stabilize the float throughout the range to keep it from hunting or wandering in the bore. The float is highly visible against a white background.

Construction assures accuracy - All Rate-Master® flowmeter bodies are injection molded of tough, clear, shatter-proof polycarbonate plastic around a precision tapered pin. The result is accurate and repeatable readings. The single piece plastic body is mounted to a stainless steel back bone into which pipe thread inserts are welded to absorb piping torque. Precision metering valves of brass or stainless steel (specify BV or SSV on order) are available as an optional extra and permit precise flow adjustments. For vacuum applications, Model RMA units are available with top mounted valves (specify TMV). The small Series RMA models are accurate within ±4% of full scale reading; Series RMB within ±3%; large Series RMC within ±2%.

Installation is simple - The Rate-Master® can be neatly through - panel mounted to keep flow tube centers in the same plane as the panel surface or surface mounted on the panel by means of tapped holes in the backbone. When through-panel mounted, the bezel automatically positions the instrument at the correct depth in the panel cutout. Surface mounted units can also be held in place by the piping. All mounting hardware plus installation and operating instructions are included.

Easy-to-Interchange bodies - Within a given Series Rate-Master® flowmeter bodies can be instantly interchanged. Simply "unplug" the body from backbone and replace it with another. "O" rings provide a tight seal on inlet and outlet. Piping remains undisturbed. Interchangeability is useful where different scale ranges are sometimes required at the same location in the laboratory or plant.

Cleaning is easy - To release the plastic flowmeter body from the stainless steel backbone, just remove four screws. Pipe thread flow connections remain undisturbed. Remove the slide cover and the plug ball stop, clean the flow tube with soap and water and reassemble. It’s that simple.

 
Model RMA-SSV 2" scale, 4-13/16 high Model RMB-SSV 5" scale, 8-3/4" high Model RMC-SSV 10" scale, 15-3/8" high
 
SPECIFICATIONS

Service: Compatible gases and liquids.
Wetted Materials: Body: Polycarbonate; O-ring: Neoprene & Buna-N; Metal Parts: Stainless steel (except for optional brass valve); Float: Stainless steel, black glass, aluminum, 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 full scale.
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).

 
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.
 
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.
 
FEATURES:

Specials - Special ranges, scales, mounting arrangements, etc. are available on special order, or in OEM quantities.

 
AVAILABLE MODELS:
Series RMA Rate-Master® Flowmeter (2" scale)
Series RMA Rate-Master® Flowmeter (2" scale) - Brass Valve
Series RMA Rate-Master® Flowmeter (2" scale) - Stainless Steel Valve
Series RMA Rate-Master® Flowmeter (2" scale) - Top Mounted Valve
Series RMB Rate-Master® Flowmeter (5" scale)
Series RMB Rate-Master® Flowmeter (5" scale) - Brass Valve
Series RMB Rate-Master® Flowmeter (5" scale) - Stainless Steel Valve
Series RMC Rate-Master® Flowmeter (10" scale)
Series RMC Rate-Master® Flowmeter (10" scale) - Brass Valve
Series RMC Rate-Master® Flowmeter (10" scale)
 
Series RMA Rate-Master® Flowmeter (2" scale)
Model Number Range
 RMA-1 .05-.5 scfh Air
 RMA-2 .1-1 scfh Air
 RMA-3 .2-2 scfh Air
 RMA-4 .5-5 scfh Air
 RMA-5 1-10 scfh Air
 RMA-6 2-20 scfh Air
 RMA-7 5-50 scfh Air
 RMA-8 10-100 scfh Air
 RMA-9 15-150 scfh Air
 RMA-10 20-200 scfh Air
 RMA-151 5-50 cc/min Air
 RMA-150 10-100 cc/min Air
 RMA-11 30-240 cc/min Air
 RMA-12 50-500 cc/min Air
 RMA-13 100-1000 cc/min Air
Model Number Range
 RMA-14 200-2500 cc/min Air
 RMA-26 .5-5 l/min Air
 RMA-21 1-10 l/min Air
 RMA-22 2-25 l/min Air
 RMA-23 5-50 l/min Air
 RMA-24 5-70 l/min Air
 RMA-25 10-100 l/min Air
 RMA-32 5-50 cc/min Water
 RMA-33 10-110 cc/min Water
 RMA-34 20-300 cc/min Water
 RMA-42 1-11 GPH Water
 RMA-43 2-24 GPH Water
 RMA-44 4-34 GPH Water
 RMA-45 5-50 GPH Water
Return to Model Selection Menu
Series RMA Rate-Master® Flowmeter (2" scale) - Brass Valve
Model Number Range
 RMA-1-BV .05-.5 scfh Air
 RMA-2-BV .1-1 scfh Air
 RMA-3-BV .2-2 scfh Air
 RMA-4-BV .5-5 scfh Air
 RMA-5-BV 1-10 scfh Air
 RMA-6-BV 2-20 scfh Air
 RMA-7-BV 5-50 scfh Air
 RMA-8-BV 10-100 scfh Air
 RMA-9-BV 15-150 scfh Air
 RMA-10-BV 20-200 scfh Air
 RMA-151-BV 5-50 cc/min Air
 RMA-150-BV 10-100 cc/min Air
 RMA-11-BV 30-240 cc/min Air
 RMA-12-BV 50-500 cc/min Air
 RMA-13-BV 100-1000 cc/min Air
Model Number Range
 RMA-14-BV 200-2500 cc/min Air
 RMA-26-BV .5-5 l/min Air
 RMA-21-BV 1-10 l/min Air
 RMA-22-BV 2-25 l/min Air
 RMA-23-BV 5-50 l/min Air
 RMA-24-BV 5-70 l/min Air
 RMA-25-BV 10-100 l/min Air
 RMA-32-BV 5-50 cc/min Water
 RMA-33-BV 10-110 cc/min Water
 RMA-34-BV 20-300 cc/min Water
 RMA-42-BV 1-11 GPH Water
 RMA-43-BV 2-24 GPH Water
 RMA-44-BV 4-34 GPH Water
 RMA-45-BV 5-50 GPH Water
Return to Model Selection Menu
Series RMA Rate-Master® Flowmeter (2" scale) - Stainless Steel Valve
Model Number Range
 RMA-1-SSV .05-.5 scfh Air
 RMA-2-SSV .1-1 scfh Air
 RMA-3-SSV .2-2 scfh Air
 RMA-4-SSV .5-5 scfh Air
 RMA-5-SSV 1-10 scfh Air
 RMA-6-SSV 2-20 scfh Air
 RMA-7-SSV 5-50 scfh Air
 RMA-8-SSV 10-100 scfh Air
 RMA-9-SSV 15-150 scfh Air
 RMA-10-SSV 20-200 scfh Air
 RMA-151-SSV 5-50 cc/min Air
 RMA-150-SSV 10-100 cc/min Air
 RMA-11-SSV 30-240 cc/min Air
 RMA-12-SSV 50-500 cc/min Air
 RMA-13-SSV 100-1000 cc/min Air
Model Number Range
 RMA-14-SSV 200-2500 cc/min Air
 RMA-26-SSV .5-5 l/min Air
 RMA-21-SSV 1-10 l/min Air
 RMA-22-SSV 2-25 l/min Air
 RMA-23-SSV 5-50 l/min Air
 RMA-24-SSV 5-70 l/min Air
 RMA-25-SSV 10-100 l/min Air
 RMA-32-SSV 5-50 cc/min Water
 RMA-33-SSV 10-110 cc/min Water
 RMA-34-SSV 20-300 cc/min Water
 RMA-42-SSV 1-11 GPH Water
 RMA-43-SSV 2-24 GPH Water
 RMA-44-SSV 4-34 GPH Water
 RMA-45-SSV 5-50 GPH Water
Return to Model Selection Menu
Series RMA Rate-Master® Flowmeter (2" scale) - Top Mounted Valve
Model Number Range
 RMA-1-TMV .05-.5 scfh Air
 RMA-2-TMV .1-1 scfh Air
 RMA-3-TMV .2-2 scfh Air
 RMA-4-TMV .5-5 scfh Air
 RMA-5-TMV 1-10 scfh Air
 RMA-6-TMV 2-20 scfh Air
 RMA-7-TMV 5-50 scfh Air
 RMA-8-TMV 10-100 scfh Air
 RMA-9-TMV 15-150 scfh Air
 RMA-10-TMV 20-200 scfh Air
 RMA-151-TMV 5-50 cc/min Air
 RMA-150-TMV 10-100 cc/min Air
 RMA-11-TMV 30-240 cc/min Air
 RMA-12-TMV 50-500 cc/min Air
 RMA-13-TMV 100-1000 cc/min Air
Model Number Range
 RMA-14-TMV 200-2500 cc/min Air
 RMA-26-TMV .5-5 l/min Air
 RMA-21-TMV 1-10 l/min Air
 RMA-22-TMV 2-25 l/min Air
 RMA-23-TMV 5-50 l/min Air
 RMA-24-TMV 5-70 l/min Air
 RMA-25-TMV 10-100 l/min Air
 RMA-32-TMV 5-50 cc/min Water
 RMA-33-TMV 10-110 cc/min Water
 RMA-34-TMV 20-300 cc/min Water
 RMA-42-TMV 1-11 GPH Water
 RMA-43-TMV 2-24 GPH Water
 RMA-44-TMV 4-34 GPH Water
 RMA-45-TMV 5-50 GPH Water
Return to Model Selection Menu
Series RMB Rate-Master® Flowmeter (5" scale)
Model Number Range
 RMB-49 .5-5 scfh Air
 RMB-50 1-10 scfh Air
 RMB-51 2-20 scfh Air
 RMB-52 5-50 scfh Air
 RMB-53 10-100 scfh Air
 RMB-54 20-200 scfh Air
 RMB-55 40-400 scfh Air
 RMB-56 50-500 scfh Air
 RMB-57 60-600 scfh Air
 RMB-82 1-12 GPH Water
 RMB-83 1-20 GPH Water
Model Number Range
 RMB-84 4-40 GPH Water
 RMB-85 10-100 GPH Water
 RMB-50D 1.2-10 scfh/0.6-5 l/min Air
 RMB-51D 3-20 scfh/1.5-9.5 l/min Air
 RMB-52D 4-50 scfh/2-23 l/min Air
 RMB-53D 60-100 scfh/5-50 l/min Air
 RMB-54D 20-200 scfh/5-95 l/min Air
 RMB-82D 1-12 GPH/0.06-0.76 l/min Water
 RMB-83D 1-20 GPH/0.065-1.25 l/min Water
 RMB-85D 10-100 GPH/0.8-6.2 l/min Water
Return to Model Selection Menu
Series RMB Rate-Master® Flowmeter (5" scale) - Brass Valve
Model Number Range
 RMB-49-BV .5-5 scfh Air
 RMB-50-BV 1-10 scfh Air
 RMB-51-BV 2-20 scfh Air
 RMB-52-BV 5-50 scfh Air
 RMB-53-BV 10-100 scfh Air
 RMB-54-BV 20-200 scfh Air
 RMB-55-BV 40-400 scfh Air
 RMB-56-BV 50-500 scfh Air
 RMB-57-BV 60-600 scfh Air
 RMB-82-BV 1-12 GPH Water
 RMB-83-BV 1-20 GPH Water
Model Number Range
 RMB-84-BV 4-40 GPH Water
 RMB-85-BV 10-100 GPH Water
 RMB-50D-BV 1.2-10 scfh/0.6-5 l/min Air
 RMB-51D-BV 3-20 scfh/1.5-9.5 l/min Air
 RMB-52D-BV 4-50 scfh/2-23 l/min Air
 RMB-53D-BV 60-100 scfh/5-50 l/min Air
 RMB-54D-BV 20-200 scfh/5-95 l/min Air
 RMB-82D-BV 1-12 GPH/0.06-0.76 l/min Water
 RMB-83D-BV 1-20 GPH/0.065-1.25 l/min Water
 RMB-85D-BV 10-100 GPH/0.8-6.2 l/min Water
Return to Model Selection Menu
Series RMB Rate-Master® Flowmeter (5" scale) - Stainless Steel Valve
Model Number Range
 RMB-49-SSV .5-5 scfh Air
 RMB-50-SSV 1-10 scfh Air
 RMB-51-SSV 2-20 scfh Air
 RMB-52-SSV 5-50 scfh Air
 RMB-53-SSV 10-100 scfh Air
 RMB-54-SSV 20-200 scfh Air
 RMB-55-SSV 40-400 scfh Air
 RMB-56-SSV 50-500 scfh Air
 RMB-57-SSV 60-600 scfh Air
 RMB-82-SSV 1-12 GPH Water
 RMB-83-SSV 1-20 GPH Water
Model Number Range
 RMB-84-SSV 4-40 GPH Water
 RMB-85-SSV 10-100 GPH Water
 RMB-50D-SSV 1.2-10 scfh/0.6-5 l/min Air
 RMB-51D-SSV 3-20 scfh/1.5-9.5 l/min Air
 RMB-52D-SSV 4-50 scfh/2-23 l/min Air
 RMB-53D-SSV 60-100 scfh/5-50 l/min Air
 RMB-54D-SSV 20-200 scfh/5-95 l/min Air
 RMB-82D-SSV 1-12 GPH/0.06-0.76 l/min Water
 RMB-83D-SSV 1-20 GPH/0.065-1.25 l/min Water
 RMB-85D-SSV 10-100 GPH/0.8-6.2 l/min Water
Return to Model Selection Menu
Series RMC Rate-Master® Flowmeter (10" scale)
Model Number Range
 RMC-101 5-50 scfh Air
 RMC-102 10-100 scfh Air
 RMC-103 20-200 scfh Air
 RMC-104 40-400 scfh Air
 RMC-105 60-600 scfh Air
 RMC-106 100-1000 scfh Air
 RMC-107 120-1200 scfh Air
 RMC-108 180-1800 scfh Air
 RMC-121 1-10 scfm Air
Model Number Range
 RMC-122 2-20 scfm Air
 RMC-123 3-30 scfm Air
 RMC-134 2-20 GPH Water
 RMC-135 8-90 GPH Water
 RMC-141 .1-1 GPM Water
 RMC-142 .2-2.2 GPM Water
 RMC-143 .4-4 GPM Water
 RMC-144 .8-7 GPM Water
 RMC-145 1.2-10 GPM Water
Return to Model Selection Menu
Series RMC Rate-Master® Flowmeter (10" scale) - Brass Valve
Model Number Range
 RMC-101-BV 5-50 scfh Air
 RMC-102-BV 10-100 scfh Air
 RMC-103-BV 20-200 scfh Air
 RMC-104-BV 40-400 scfh Air
 RMC-105-BV 60-600 scfh Air
 RMC-106-BV 100-1000 scfh Air
 RMC-107-BV 120-1200 scfh Air
 RMC-108-BV 180-1800 scfh Air
 RMC-121-BV 1-10 scfm Air
Model Number Range
 RMC-122-BV 2-20 scfm Air
 RMC-123-BV 3-30 scfm Air
 RMC-134-BV 2-20 GPH Water
 RMC-135-BV 8-90 GPH Water
 RMC-141-BV .1-1 GPM Water
 RMC-142-BV .2-2.2 GPM Water
 RMC-143-BV .4-4 GPM Water
 RMC-144-BV .8-7 GPM Water
 RMC-145-BV 1.2-10 GPM Water
Return to Model Selection Menu
Series RMC Rate-Master® Flowmeter (10" scale)
Model Number Range
 RMC-101-SSV 5-50 scfh Air
 RMC-102-SSV 10-100 scfh Air
 RMC-103-SSV 20-200 scfh Air
 RMC-104-SSV 40-400 scfh Air
 RMC-105-SSV 60-600 scfh Air
 RMC-106-SSV 100-1000 scfh Air
 RMC-107-SSV 120-1200 scfh Air
 RMC-108-SSV 180-1800 scfh Air
 RMC-121-SSV 1-10 scfm Air
 RMC-122-SSV 2-20 scfm Air
 RMC-123-SSV 3-30 scfm Air
 RMC-134-SSV 2-20 GPH Water
 RMC-135-SSV 8-90 GPH Water
 RMC-141-SSV .1-1 GPM Water
 RMC-142-SSV .2-2.2 GPM Water
 RMC-143-SSV .4-4 GPM Water
 RMC-144-SSV .8-7 GPM Water
 RMC-145-SSV 1.2-10 GPM Water
Model Number Range
 RMC-101-SSV 5-50 scfh Air
 RMC-102-SSV 10-100 scfh Air
 RMC-103-SSV 20-200 scfh Air
 RMC-104-SSV 40-400 scfh Air
 RMC-105-SSV 60-600 scfh Air
 RMC-106-SSV 100-1000 scfh Air
 RMC-107-SSV 120-1200 scfh Air
 RMC-108-SSV 180-1800 scfh Air
 RMC-121-SSV 1-10 scfm Air
 RMC-122-SSV 2-20 scfm Air
 RMC-123-SSV 3-30 scfm Air
 RMC-134-SSV 2-20 GPH Water
 RMC-135-SSV 8-90 GPH Water
 RMC-141-SSV .1-1 GPM Water
 RMC-142-SSV .2-2.2 GPM Water
 RMC-143-SSV .4-4 GPM Water
 RMC-144-SSV .8-7 GPM Water
 RMC-145-SSV 1.2-10 GPM Water
 
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