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10" scale (RMC) - no valve

10" scale (RMC) with Stainless Steel Valve

2" Scale (RMA) - no valve

2" Scale (RMA) with Stainless Steel Valve

2" Scale (RMA) with Top Mounted Valve

5" scale (RMB) - no valve

5" scale (RMB) with Stainless Steel Valve

Grouped product items
Model	Description	Availability*	Price
RMA-1	Flowmeter, range .05-.4 SCFH air, no valve.	1-2 Weeks*	$60.25
RMA-10	Flowmeter, range 20-200 SCFH air, no valve.	1-2 Weeks*	$60.25
RMA-11	Flowmeter, range 30-200 cc/min air, no valve.	1-3 days*	$60.25
RMA-12	Flowmeter, range 50-500 cc/min air, no valve.	1-2 Weeks*	$60.25
RMA-13	Flowmeter, range 100-1000 cc/min air, no valve.	1-2 Weeks*	$60.25
RMA-14	Flowmeter, range 200-2500 cc/min air, no valve.	1-2 Weeks*	$60.25
RMA-150	Flowmeter, range 10-100 cc/min air, no valve. ±8% accuracy.	1-3 days*	$90.60
RMA-151	Flowmeter, range 5-50 cc/min air, no valve. ±8% accuracy.	1-3 days*	$90.60
RMA-2	Flowmeter, range .1-1 SCFH air, no valve.	1-2 Weeks*	$60.25
RMA-21	Flowmeter, range 1-10 LPM air, no valve.	1-3 days*	$60.25
RMA-22	Flowmeter, range 2-25 LPM air, no valve.	1-2 Weeks*	$60.25
RMA-23	Flowmeter, range 5-50 LPM air, no valve.	1-2 Weeks*	$60.25
RMA-24	Flowmeter, range 5-70 LPM air, no valve.	1-2 Weeks*	$60.25
RMA-25	Flowmeter, range 10-100 LPM air, no valve.	1-2 Weeks*	$60.25
RMA-26	Flowmeter, range .5-5 LPM air, no valve.	1-3 days*	$60.25
RMA-3	Flowmeter, range.2-2 SCFH air, no valve.	1-2 Weeks*	$60.25
RMA-32	Flowmeter, range 5-50 cc/min water, no valve.	1-2 Weeks*	$60.25
RMA-33	Flowmeter, range 10-110 cc/min water, no valve.	1-3 days*	$60.25
RMA-34	Flowmeter, range 20-300 cc/min water, no valve.	1-2 Weeks*	$60.25
RMA-10-SSV	Flowmeter, range 20-200 SCFH air.	1-3 days*	$79.90
RMA-10-TMV	Flowmeter, range 20-200 SCFH air.	1-2 Weeks*	$113.10
RMA-6	Flowmeter, range 2-20 SCFH air, no valve.	1-2 Weeks*	$60.25
RMA-11-SSV	Flowmeter, range 30-200 cc/min air.	1-3 days*	$79.90
RMA-6-SSV	Flowmeter, range 2-20 SCFH air.	1-3 days*	$79.90
RMA-11-TMV	Flowmeter, range 30-200 cc/min air.	1-2 Weeks*	$113.10
RMA-6-TMV	Flowmeter, range 2-20 SCFH air.	1-2 Weeks*	$113.10
RMA-12-SSV	Flowmeter, range 50-500 cc/min air.	1-3 days*	$79.90
RMA-7	Flowmeter, range 5-50 SCFH air, no valve.	1-2 Weeks*	$60.25
RMA-7-SSV	Flowmeter, range 5-50 SCFH air.	1-3 days*	$79.90
RMA-12-TMV	Flowmeter, range 50-500 cc/min air.	1-2 Weeks*	$113.10
RMA-13-SSV	Flowmeter, range 100-1000 cc/min air.	1-3 days*	$79.90
RMA-7-TMV	Flowmeter, range 5-50 SCFH air.	1-2 Weeks*	$113.10
RMA-13-TMV	Flowmeter, range 100-1000 cc/min air.	1-2 Weeks*	$113.10
RMA-8	Flowmeter, range 10-100 SCFH air, no valve.	1-2 Weeks*	$60.25
RMA-14-SSV	Flowmeter, range 200-2500 cc/min air.	1-3 days*	$79.90
RMA-8-SSV	Flowmeter, range 10-100 SCFH air.	1-3 days*	$79.90
RMA-14-TMV	Flowmeter, range 200-2500 cc/min air.	1-2 Weeks*	$113.10
RMA-8-TMV	Flowmeter, range 10-100 SCFH air.	1-3 days*	$113.10
RMA-9	Flowmeter, range 15-150 SCFH air, no valve.	1-2 Weeks*	$60.25
RMA-150-SSV	Flowmeter, range 10-100 cc/min air. ±8% accuracy.	1-3 days*	$110.25
RMA-150-TMV	Flowmeter, range 10-100 cc/min air. ± 8% accuracy.	1-2 Weeks*	$143.45
RMA-9-SSV	Flowmeter, range 15-150 SCFH air.	1-2 Weeks*	$79.90
RMA-151-SSV	Flowmeter, range 5-50 cc/min air. ±8% accuracy.	1-3 days*	$110.25
RMA-9-TMV	Flowmeter, range 15-150 SCFH air.	1-2 Weeks*	$113.10
RMA-151-TMV	Flowmeter, range 5-50 cc/min air. ± 8% accuracy.	1-2 Weeks*	$143.45
RMB-49	Flowmeter, range .5-5 SCFH air. ±5% accuracy.	1-2 Weeks*	$78.35
RMA-1-SSV	Flowmeter, range .05-.4 SCFH air.	1-3 days*	$79.90
RMB-49-SSV	Flowmeter, range .5-5 SCFH air. ±5% accuracy.	1-3 days*	$101.10
RMA-1-TMV	Flowmeter, range .05-.4 SCFH air.	1-2 Weeks*	$113.10
RMB-50	Flowmeter, range 1-10 SCFH air.	1-2 Weeks*	$78.35
RMA-21-SSV	Flowmeter, range 1-10 LPM air.	1-3 days*	$79.90
RMB-50D	Flowmeter, range 1.2-10 SCFH/0.6-5 LPM air.	1-2 Weeks*	$78.35
RMA-21-TMV	Flowmeter, range 1-10 LPM air.	1-3 days*	$113.10
RMB-50D-SSV	Flowmeter, range 1.2-10 SCFH/0.6-5 LPM air.	1-3 days*	$101.10
RMA-22-SSV	Flowmeter, range 2-25 LPM air.	1-3 days*	$79.90
RMB-50-SSV	Flowmeter, range 1-10 SCFH air.	1-3 days*	$101.10
RMA-22-TMV	Flowmeter, range 2-25 LPM air.	1-3 days*	$113.10
RMB-51	Flowmeter, range 2-20 SCFH air.	1-2 Weeks*	$78.35
RMA-23-SSV	Flowmeter, range 5-50 LPM air.	1-3 days*	$79.90
RMB-51D	Flowmeter, range 2-20 SCFH/1-9.5 LPM air.	1-2 Weeks*	$78.35
RMA-23-TMV	Flowmeter, range 5-50 LPM air.	1-2 Weeks*	$113.10
RMB-51D-SSV	Flowmeter, range 2-20 SCFH/1-9.5 LPM air.	1-3 days*	$101.10
RMA-24-SSV	Flowmeter, range 5-70 LPM air.	1-3 days*	$79.90
RMB-51-SSV	Flowmeter, range 2-20 SCFH air.	1-3 days*	$101.10
RMA-24-TMV	Flowmeter, range 5-70 LPM air.	1-2 Weeks*	$113.10
RMB-52	Flowmeter, range 5-50 SCFH air.	1-3 days*	$78.35
RMA-25-SSV	Flowmeter, range 10-100 LPM air.	1-3 days*	$79.90
RMB-52D	Flowmeter, range 4-50 SCFH/2-23 LPM air.	1-2 Weeks*	$78.35
RMA-25-TMV	Flowmeter, range 10-100 LPM air.	1-2 Weeks*	$113.10
RMB-52D-SSV	Flowmeter, range 4-50 SCFH/2-23 LPM air.	1-3 days*	$101.10
RMA-26-SSV	Flowmeter, range .5-5 LPM air.	1-3 days*	$79.90
RMB-52-SSV	Flowmeter, range 5-50 SCFH air.	1-3 days*	$101.10
RMA-26-TMV	Flowmeter, range .5-5 LPM air.	1-3 days*	$113.10
RMB-53	Flowmeter, range 10-100 SCFH air.	1-2 Weeks*	$78.35
RMA-2-SSV	Flowmeter, range .1-1 SCFH air.	1-3 days*	$79.90
RMB-53D	Flowmeter, range 10-100 SCFH/5-50 LPM air.	1-2 Weeks*	$78.35
RMA-2-TMV	Flowmeter, range .1-1 SCFH air.	1-2 Weeks*	$113.10
RMB-53D-SSV	Flowmeter, range 10-100 SCFH/5-50 LPM air.	1-3 days*	$101.10
RMB-53-SSV	Flowmeter, range 10-100 SCFH air.	1-3 days*	$101.10
RMA-32-SSV	Flowmeter, range 5-50 cc/min water.	1-3 days*	$79.90
RMA-33-SSV	Flowmeter, range 10-110 cc/min water.	1-2 Weeks*	$79.90
RMB-54	Flowmeter, range 20-200 SCFH air.	1-2 Weeks*	$78.35
RMA-34-SSV	Flowmeter, range 20-300 cc/min water.	1-3 days*	$79.90
RMB-54D	Flowmeter, range 20-200 SCFH/10-95 LPM air.	1-2 Weeks*	$78.35
RMA-3-SSV	Flowmeter, range.2-2 SCFH air.	1-3 days*	$79.90
RMB-54D-SSV	Flowmeter, range 20-200 SCFH/10-95 LPM air.	1-3 days*	$101.10
RMA-3-TMV	Flowmeter, range.2-2 SCFH air.	1-2 Weeks*	$113.10
RMB-54-SSV	Flowmeter, range 20-200 SCFH air.	1-3 days*	$101.10
RMA-4	Flowmeter, range .5-5 SCFH air, no valve.	1-3 days*	$60.25
RMB-55	Flowmeter, range 40-400 SCFH air.	1-2 Weeks*	$78.35
RMA-42	Flowmeter, range 1-11 GPH water, no valve.	1-3 days*	$60.25
RMB-55-SSV	Flowmeter, range 40-400 SCFH air.	1-3 days*	$101.10
RMA-42-SSV	Flowmeter, range 1-11 GPH water.	1-3 days*	$79.90
RMB-56	Flowmeter, range 50-500 SCFH air.	1-2 Weeks*	$78.35
RMA-43	Flowmeter, range 2-24 GPH water, no valve.	1-2 Weeks*	$60.25
RMB-56-SSV	Flowmeter, range 50-500 SCFH air.	1-3 days*	$101.10
RMA-43-SSV	Flowmeter, range 2-24 GPH water.	1-3 days*	$79.90
RMB-57	Flowmeter, range 60-600 SCFH air.	1-2 Weeks*	$78.35
RMA-44	Flowmeter, range 4-34 GPH water, no valve.	1-2 Weeks*	$60.25
RMB-57-SSV	Flowmeter, range 60-600 SCFH air.	1-3 days*	$101.10
RMA-44-SSV	Flowmeter, range 4-34 GPH water.	1-2 Weeks*	$79.90
RMB-82	Flowmeter, range 1-12 GPH water.	1-2 Weeks*	$78.35
RMA-45	Flowmeter, range 5-50 GPH water, no valve.	1-3 days*	$60.25
RMB-82D	Flowmeter, range 1-12 GPH/0.06-0.76 LPM water.	1-2 Weeks*	$78.35
RMA-45-SSV	Flowmeter, range 5-50 GPH water.	1-3 days*	$79.90
RMB-82D-SSV	Flowmeter, range 1-12 GPH/0.06-0.76 LPM water.	1-3 days*	$101.10
RMA-4-SSV	Flowmeter, range .5-5 SCFH air.	1-3 days*	$79.90
RMB-82-SSV	Flowmeter, range 1-12 GPH water.	1-3 days*	$101.10
RMA-4-TMV	Flowmeter, range .5-5 SCFH air.	1-2 Weeks*	$113.10
RMB-83	Flowmeter, range 1-20 GPH water.	1-2 Weeks*	$78.35
RMA-5	Flowmeter, range 1-10 SCFH air, no valve.	1-3 days*	$60.25
RMB-83D	Flowmeter, range 1-20 GPH/0.065-1.25 LPM water.	1-2 Weeks*	$78.35
RMA-5-SSV	Flowmeter, range 1-10 SCFH air.	1-3 days*	$79.90
RMB-83D-SSV	Flowmeter, range 1-20 GPH/0.065-1.25 LPM water.	1-3 days*	$101.10
RMA-5-TMV	Flowmeter, range 1-10 SCFH air.	1-2 Weeks*	$113.10
RMB-83-SSV	Flowmeter, range 1-20 GPH water.	1-3 days*	$101.10
RMB-84	Flowmeter, range 4-40 GPH water.	1-2 Weeks*	$78.35
RMB-84-SSV	Flowmeter, range 4-40 GPH water.	1-3 days*	$101.10
RMB-85	Flowmeter, range 10-100 GPH water.	1-2 Weeks*	$78.35
RMB-85D	Flowmeter, range 10-100 GPH/0.8-6.2 LPM water.	1-2 Weeks*	$78.35
RMB-85D-SSV	Flowmeter, range 10-100 GPH/0.8-6.2 LPM water.	1-3 days*	$101.10
RMB-85-SSV	Flowmeter, range 10-100 GPH water.	1-3 days*	$101.10
RMC-101	Flowmeter, range 5-50 SCFH air.	1-2 Weeks*	$178.15
RMC-101-SSV	Flowmeter, range 5-50 SCFH air.	1-3 days*	$244.55
RMC-102	Flowmeter, range 10-100 SCFH air.	1-2 Weeks*	$178.15
RMC-102-SSV	Flowmeter, range 10-100 SCFH air.	1-3 days*	$244.55
RMC-103	Flowmeter, range 20-200 SCFH air.	1-2 Weeks*	$178.15
RMC-103-SSV	Flowmeter, range 20-200 SCFH air.	1-2 Weeks*	$244.55
RMC-104	Flowmeter, range 40-400 SCFH air.	1-2 Weeks*	$178.15
RMC-104-SSV	Flowmeter, range 40-400 SCFH air.	1-3 days*	$244.55
RMC-105	Flowmeter, range 60-600 SCFH air.	1-2 Weeks*	$178.15
RMC-105-SSV	Flowmeter, range 60-600 SCFH air.	1-3 days*	$244.55
RMC-106	Flowmeter, range 100-1000 SCFH air.	1-2 Weeks*	$178.15
RMC-106-SSV	Flowmeter, range 100-1000 SCFH air.	1-3 days*	$244.55
RMC-107	Flowmeter, range 120-1200 SCFH air.	1-2 Weeks*	$178.15
RMC-107-SSV	Flowmeter, range 120-1200 SCFH air.	1-3 days*	$244.55
RMC-108	Flowmeter, range 200-1800 SCFH air.	1-3 days*	$178.15
RMC-108-SSV	Flowmeter, range 200-1800 SCFH air.	1-3 days*	$244.55
RMC-121	Flowmeter, range 1-10 SCFM air.	1-3 days*	$178.15
RMC-121-SSV	Flowmeter, range 1-10 SCFM air.	1-3 days*	$244.55
RMC-122	Flowmeter, range 2-20 SCFM air.	1-2 Weeks*	$178.15
RMC-122-SSV	Flowmeter, range 2-20 SCFM air.	1-3 days*	$244.55
RMC-123	Flowmeter, range 3-30 SCFM air.	1-2 Weeks*	$178.15
RMC-123-SSV	Flowmeter, range 3-30 SCFM air.	1-3 days*	$244.55
RMC-134	Flowmeter, range 2-20 GPH water.	1-2 Weeks*	$178.15
RMC-134-SSV	Flowmeter, range 2-20 GPH water.	1-3 days*	$244.55
RMC-135	Flowmeter, range 8-90 GPH water.	1-2 Weeks*	$178.15
RMC-135-SSV	Flowmeter, range 8-90 GPH water.	1-3 days*	$244.55
RMC-141	Flowmeter, range .1-1 GPM water.	1-2 Weeks*	$178.15
RMC-141-SSV	Flowmeter, range .1-1 GPM water.	1-3 days*	$244.55
RMC-142	Flowmeter, range .2-2.2 GPM water.	1-2 Weeks*	$178.15
RMC-142-SSV	Flowmeter, range .2-2.2 GPM water.	1-3 days*	$244.55
RMC-143	Flowmeter, range .4-4 GPM water.	1-2 Weeks*	$178.15
RMC-143-SSV	Flowmeter, range .4-4 GPM water.	1-3 days*	$244.55
RMC-144	Flowmeter, range .8-7 GPM water.	1-2 Weeks*	$178.15
RMC-144-SSV	Flowmeter, range .8-7 GPM water.	1-3 days*	$244.55
RMC-145	Flowmeter, range 1.2-10 GPM water.	1-2 Weeks*	$178.15
RMC-145-SSV	Flowmeter, range 1.2-10 GPM water.	1-3 days*	$244.55

Specifications

Service:: Compatible gases and liquids.
Wetted Materials:: Body: Polycarbonate; O-ring: Neoprene and Buna-N; Metal parts: SS; Float: SS, 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 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).
Compliance:: 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.

Features

Eliminate the need for troublesome conversions with direct reading scales
Reduce installation damage and cost due to stainless steel backbone that absorbs piping torque
Long operation life with durable, shatter-proof polycarbonate body
High repeatability enabled by precision injection molding around a precision tapered pin
Increased reading accuracy with special integral flow guides that stabilize float movement
Save time with instantaneous flow reading from scale graduations on both sides of the indicating tube

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.

Support Library

Product Literature

Manuals

Catalog Pages

Series RM Catalog Page

Product Data Sheet

RM

Approvals

Drawings

Model Chart

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 30-200 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 NIST SPCL SSV TMV VIT WL	Adjustable Pointer Flag Arbitrary Scale (no units) Aluminum Tag Body Only Body Only Valve Unit NIST Traceable Calibration Certificate 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 NIST SPCL SSV VIT WL	Arbitrary Scale (no units) Aluminum Tag Body Only Body Only Valve Unit Adjustable Pointer Flag NIST Traceable Calibration Certificate 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 200-1800 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 NIST CPF SPCL SSV VIT WL	Arbitrary Scale (no units) Aluminum Tag Body Only Body Only Valve Unit NIST Traceable Calibration Certificate Adjustable Pointer Flag Special Cleaning Stainless Steel Valve Fluoroelastomer O-rings Without Logo

FAQ

Questions

Question

How are Dwyer flowmeters properly read?

Answer

The flow rate is read at the maximum width portion of the float regardless of shape.

Related

Series VFC/VFCII

Series VF

Series MM

Series RM

Question

I am looking to use an "Air" flowmeter RMA-6-SSV to monitor CO2 flow. I am wondering if there are are any concerns or correction factors I need to apply.

Answer

A specific gravity correction factor will need to be considered when monitoring other gases with a meter calibrated for air. The correction factor equation is as follows: Q2=Q1 x sqrt (1/S.G.) Where: Q1= Observed Flowmeter reading Q2= Standard Flow Corrected for Specific Gravity 1= Specific Gravity of Air or Water S.G.= Specific Gravity of media being used in flowmeter originally calibrated for air or water.
This equation can be found in the beginning of the Flow section in the catalog. Alternatively, special ranges and scales can be provided; for specific information please contact our technical service department.

Related

Series DR

Series RM

Series VF

Series LFM

Series VFC/VFCII

Series VA

Question

Instruction Sheet specs on RM series flowmeters list 100 PSI max pressure, but have seen several RMC flowmeter labels with 35 PSI max pressure rating. Some clarification on pressure ratings please? Thank you.

Answer

The older version of the RMC used to have a pressure limit of 35psi because the back plate was assembled from 2 separate pieces. The pressure rating increased to 100psi when we began to stamp the back plate from 1 solid piece.

Related

Series RM

Question

Where is the date code or lot number located on the flowmeter Model RMA-3-SSV?

Answer

The date code is on the label.

Related

Series RM

Question

Are your flowmeters (particularly the brass body models) RoHS compliant? Can you provide a statement to that effect?

Answer

You can find the RoHS Compliance letter in the tab marked APPROVALS on RM Series.

Related

Series RM

Question

For the VFA-44-BV product, what is the minimum flow that I can reliably control with a pressure head of up to 4 bar? Will the needle valve function properly at that pressure/flow combination? Thank you.

Answer

At a pressure of 4 bar (58 psi), the needle valve should function properly and provide reliable control over the whole range, which is 8-40 gallons of water per hour.

Related

Series VF

Series RM

Question

Is a Dwyer Certificate of Conformance offered with any of the flowmeter models?

Answer

A standard Dwyer Certificate of Conformance can be offered with all Dwyer Mini-Master®, Rate-Master®, and Visi-Float® flowmeters on all water ranges (or other compatible liquids).

Related

Series VFC/VFCII

Series MM

Series VF

Series RM

Question

Are special ranges available for the Rate-Master® and/or Visi-Float® Flowmeter?

Answer

Yes, other ranges are available which are not specified in our catalog. Please feel free to contact Dwyer with questions on these ranges.

Related

Series VFC/VFCII

Series RM

Series VF

Question

Is the Rate-Master® or Visi-Float® Flowmeter compatible with any media?

Answer

The Rate-Master® Flowmeter is manufactured from a polycarbonate plastic and the Visi-Float® Flowmeter is manufactured from acrylic. Compatibility charts need to be reviewed to determine if these materials of construction are compatible with your media.

Related

Series VF

Series RM

Series VFC/VFCII

Question

Why are top mounted valves recommended for flowmeters used for vacuum service?

Answer

To maintain atmospheric pressure in the indicating bore and therefore preserve accuracy; an inlet restriction would reduce pressure in the bore. This is essentially the opposite situation to outlet back-pressure in a pressure system which increases pressure in the bore and also affects accuracy. Remember that all standard Dwyer flowmeters are calibrated for standard atmospheric pressure and temperature in the bore.

Related

Series MM

Series RM

Question

What factor is used to correct for different flowmeter inlet pressure?

Answer

If the flowmeter is exhausting to atmosphere, no correction factor is needed. If back-pressure is present due to downstream plumbing or restrictions, this error can be corrected utilizing the conversion curves in our full-line catalog or the following equation.

Pressure: Q2 = Q1 x √((P1 x T2)/(P2 x T1))

Where:
Q1 = Observed Flowmeter Reading
Q2 = Standard Flow Corrected for Specific Gravity
P1 = Actual Pressure (14.7 psia + Gage Pressure)
P2 = Standard Pressure (14.7 psia, which is 0 psig)
T1 = Actual Temperature (460 R + Temp °F)
T2 = Standard Temperature (530 R, which is 70°F)

Related

Series RM

Series VFC/VFCII

Series MM

Series VF

Question

What is the calibration frequency, if required, for a RMB flowmeter?

Answer

Calibration frequency would be once a year if necessary. We offer a NIST calibration certificate which expires in one year. Contact Customer Service for additional details.

Related

Series RM

Question

Which flowmeters are available with NIST traceability?

Answer

All Dwyer Mini-Master®, Rate-Master®, and Visi-Float® flowmeters are available with NIST traceability on all air ranges except for RMA-1, RMA-11, RMA-150, RMA-151, VFA-1, VFA-21 and VFB-60 models.

Related

Series VF

Series MM

Series VFC/VFCII

Series RM

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Accessories

Model	Description	Availability*	Price
RKA	Regulator kit for RMA or VFA.	1-3 days*	$304.25
RK-RMB	Regulator kit for RMB.	1-2 Weeks*	$304.25
100042-00	Optional pointer flag, for RMA flowmeter	1-3 days*	$9.70
100043-00	Optional pointer flag, for RMB flowmeter	1-3 days*	$10.20
100044-00	Optional pointer flag, for RMC flowmeter	1-3 days*	$10.20

VFB-91D-SSV

Series VF Visi-Float® Acrylic Flowmeter

Series RM Rate-Master® Polycarbonate Flowmeter

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