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RMA 2” Scale
RMB 5” Scale
RMC 10” Scale
RMA, RMB and RMC with optional integral flow control needle valve.
Molded of Tough Polycarbonate Plastic Indicate and Manually Control Air Flows from 0.1 to 1800 SCFH Indicate and Manually Control Water Flows up to 10 USGPM   Easy to read design- The direct reading scales eliminate troublesome conversions. The scales are brushed aluminium, coasted 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-Critical internal diameter of the variable orifice tube is held within +/-0.0004". The result is accurate and reatable readings. The series RMA models are accurate within +/-4%; Series RMB with +/-3% and the Series RMC within +/- 2%. Choose from a variety of sizes- The compact RMA series offers a 2" long scale and 1/8"NPT connections. The mid-size RMB offers a 5" scale and 1/4"NPT connections. The large RMC series has a 10" scale and 1/2"NPT connections. All units come standard with chrome plated brass connections, with stainless steel being an option. All units may be ordered with no valve or a choice of an integral brass or stainless steel needle valve.
Specifications Meter Body, Bezel and Tube: Polycarbonate Wetted Metal Parts: Stainless Steel (except for optional brass valves) Floats: Stainless Steel; Black Glass; Aluminum; K Monel; Tungsten Carbide (dependant upon range) Float Stops: Polycarbonate Pipe Connections: RMA: 1/8" FNPT RMB: 1/4" FNPT RMC: 1/2" FNPT "O" Rings: Neoprene and Buna N Fittings: Stainless steel brazed to stainless steel back bone plate Rivets: Stainless steel, set into slots Scale: Brushed aluminum; clear epoxy coated Adjustment Knob: ABS Plastic Pressure Rating: 100 PSI Temperature Rating: 130°F (54°C) Maximum Accuracy: RMA: ±4% (range 150 and 151: ±8%) of full scale RMB: ±3% (range 49: ±5%) of full scale RMC: ±2% of full scale
Ordering Information (see table below for ‘x’ range number) RMA-x Standard RMA RMA-x-BV RMA with Brass Valve RMA-x-SSV RMA with Stainless Steel Valve RMA-x-TMV RMA with Top Mount Valve, for vacuum applications RMB-x Standard RMB RMB-x-BV RMB with Brass Valve RMB-x-SSV RMB with Stainless Steel Valve RMC-x Standard RMC RMC-x-BV RMC with Brass Valve RMC-x-SSV RMC with Stainless Steel Valve
Range Codes (’x’)
RMA Series for Air Range Code SCFH Air 0.05-0.5 1 0.1-1 2 0.2-2 3 0.5-5 4 1-10 5 2-20 6 5-50 7 10-100 8 15-150 9 20-200 10 cc/min Air 5-50 151 10-100 150 30-240 11 50-500 12 100-1000 13 200-2500 14 l/m Air 0.5-5 26 1-10 21 2-25 22 5-50 23 5-70 24 10-100 25
RMA Series for Water Range Code cc/min Water 5-50 32 10-110 33 20-300 34 US Gal./hr Water 1-11 42 2-24 43 4-34 44 5-50 45
RMB Series for Air Range Code SCFH Air 0.5-5 49 1-10 50 3-20 51 4-50 52 10-100 53 20-200 54 40-400 55 50-500 56 60-600 57 SCFH & l/m Air 1.2-10/0.6-5 50D 3-20/1.5-9.5 51D 4-50/2-23 52D 10-100/5-50 53D 20-200/5-95 54D
RMB Series for Water Range Code US Gal/hr. Water 1-12 82 1-20 83 4-40 84 10-100 85 US GPH & l/m Water 1-12/0.06-0.76 50D 1-20/0.065-1.25 83D 10-100/0.8-6.2 85D
RMC Series for Air Range Code SCFH Air 5-50 101 10-100 102 20-200 103 40-400 104 60-600 105 100-1000 106 120-1200 107 200-1800 108 SCFM Air 1-10 121 2-20 122 4-30 123
RMC Series for Water Range Code US GPH Water 2-20 134 8-90 135 US GPM Water 0.1-1 141 0.2-2.2 142 0.4-4 143 0.8-7 144 1.2-10 145
Dimensions
Flowmeter Dimensions - click image to enlarge