Dwyer Series RM Rate-Master® Flowmeter

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 use to measure flow of air & water as well as other compatible gases& fluids. We can provide a suitable pressure regulator for these Dwyer flowmeters.

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

Series RMA - 2" Scale EXAMPLE RMA 1 APF Series RMA-1-APF Rate-Master® Flowmeter, 2" Scale, range .05-.5 SCFH air, with adjustable pointer flag. SERIES RMA     Rate-Master® Flowmeter, 2" Scale RANGE   1 2 3 4 5 6 7 8 9 10 151 150 11 12 13 14 15 16 26 21 22 23 24 25 32 33 34 42 43 44 45   .05-.5 SCFH Air .1-1 SCFH Air .2-2 SCFH Air .5-5 SCFH Air 1-10 SCFH Air 2-20 SCFH Air 5-50 SCFH Air 10-100 SCFH Air 15-150 SCFH Air 20-200 SCFH Air 5-50 cc/min Air 10-100 cc/min Air 30-240 cc/min Air 50-500 cc/min Air 100-1000 cc/min Air 200-2500 cc/min Air 400-5000 cc/min Air 1000-10000 cc/min Air .5-5 LPM Air 1-10 LPM Air 2- 25 LPM Air 5-50 LPM Air 5-70 LPM Air 10-100 LPM Air 5-50 cc/min Water 10-110 cc/min Water 20-300 cc/min Water 1-11 GPH Water 2-24 GPH Water 4-34 GPH Water 5-50 GPH Water OPTIONS     APF ARB AT BO BOV BV NIST PTFE SPCL SSV TMV VIT WL Adjustable Pointer Flag Arbitrary Scale (no units) Aluminum Tag Body Only Body Only Valve Unit Brass Valve NIST Traceable Calibration Certificate PTFE Valve Seat Special Cleaning Stainless Steel Valve Top Mounted Valve Fluoroelastomer O-rings Without Logo Series RMB - 5" Scale EXAMPLE RMB 49 BPF Series RMB-49-BPF Rate-Master® Flowmeter, 5" Scale, range .5-5 SCFH air, with adjustable pointer flag. SERIES RMB     Rate-Master® Flowmeter, 5 " Scale RANGE   49 50 51 52 53 54 55 56 57 82 83 84 85 50D 51D 52D 53D 54D 82D 83D 85D   .5-5 SCFH Air 1-10 SCFH Air 2-20 SCFH Air 5-50 SCFH Air 10-100 SCFH Air 20-200 SCFH Air 40-400 SCFH Air 50-500 SCFH Air 60-600 SCFH Air 1-12 GPH Water 1-20 GPH Water 4-40 GPH Water 10-100 GPH Water 1.2-10 SCFH & 0.6-5 LPM Air 3-20 SCFH & 1.5-9.5 LPM Air 4-50 SCFH & 2-23 LPM Air 10-100 SCFH & 5-50 LPM Air 20-200 SCFH & 10-95 LPM Air 1-12 GPH & 0.06-0.76 LPM Water 1-20 GPH & 0.065-1.25 LPM Water 10-100 GPH & 0.5-6.2 LPM Water OPTIONS     ARB AT BO BOV BPF BV NIST PTFE SPCL SSV VIT WL Arbitrary Scale (no units) Aluminum Tag Body Only Body Only Valve Unit Adjustable Pointer Flag Brass Valve NIST Traceable Calibration Certificate PTFE Valve Seat Special Cleaning Stainless Steel Valve Fluoroelastomer O-rings Without Logo Series RMC - 10" Scale EXAMPLE RMC 101 CPF Series RMC-101-CPF Rate-Master® Flowmeter, 10" scale, range 5-50 SCFH air, with adjustable pointer flag. SERIES RMC     Rate-Master® Flowmeter, 10" Scale RANGE   101 102 103 104 105 106 107 108 121 122 123 134 135 141 142 143 144 145   5-50 SCFH Air 10-100 SCFH Air 20-200 SCFH Air 40-400 SCFH Air 60-600 SCFH Air 100-1000 SCFH Air 120-1200 SCFH Air 180-1800 SCFH Air 1-10 SCFM Air 2-20 SCFM Air 3-30 SCFM Air 2-20 GPH Water 8-90 GPH Water .1-1 GPM Water .2-2.2 GPM Water .4-4 GPM Water .8-7 GPM Water 1.2-10 GPM Water OPTIONS     ARB AT BO BOV BV NIST CPF SPCL SSV VIT WL Arbitrary Scale (no units) Aluminum Tag Body Only Body Only Valve Unit Brass Valve NIST Traceable Calibration Certificate Adjustable Pointer Flag Special Cleaning Stainless Steel Valve Fluoroelastomer O-rings Without Logo