Dwyer RMB-51-SSV Rate-Master Flowmeter SCFH Air 5-20 70 PSI Series RMB

Dwyer RMB-51-SSV Rate-Master Flowmeter SCFH Air 5-20 70 PSI Series RMB

The Dwyer RMB-51-SSV is a variable area flowmeter (rotameter) from Dwyer Instruments' Series RMB Rate-Master line. It measures air flow in standard cubic feet per hour (SCFH), with a scale reading from 5 to 20 SCFH. The acrylic body allows direct visual reading of the float position, and the integrated stainless steel valve (SSV suffix) provides flow adjustment at the meter. Made in the U.S.A. and sold new in its original Dwyer box.

Specifications & What's Included

• Model / Cat. No.: RMB-51-SSV
• Series: Rate-Master Series RMB
• Measured fluid: Air
• Scale range: 5 to 20 SCFH (Standard Cubic Feet per Hour)
• Scale units: SCFH Air
• Valve: Stainless steel needle valve (SSV) integrated at bottom
• Tube material: Clear acrylic
• Maximum pressure: 70 PSI
• Maximum temperature: 130°F
• Connection: Threaded inlet (bottom) and outlet (top)
• Mounting orientation: Vertical
• Country of manufacture: United States
• Date code: S16D
• Includes: Flowmeter in original Dwyer Series RMB box

Applications

The Dwyer Rate-Master Series RMB is a widely used line of direct-reading variable area flowmeters designed for low-pressure gas and air flow measurement in laboratory, industrial, and HVAC applications. They are commonly used to monitor and regulate air flow to instruments, pneumatic controls, purge systems, gas analyzers, and process equipment where a simple, low-cost inline flow indication is needed. The clear acrylic tube and built-in needle valve make the RMB series a practical choice for bench-top setups, test rigs, and any application requiring visual confirmation of flow rate without electronic instrumentation. The SSV (stainless steel valve) version is suited for applications where corrosion resistance or compatibility with mildly aggressive environments is a consideration. These meters remain standard fixtures in industrial and laboratory settings today.