Overview
The Dwyer RMB-50-SSV is a precision variable-area flowmeter from Dwyer’s Rate-Master line, engineered for low-flow air measurement in industrial, laboratory, and test environments. This direct-reading flowmeter requires no external power or conversion calculations, making it ideal for applications requiring simple, accurate flow monitoring across a 1–10 SCFH (standard cubic feet per hour) range.
Key Features
- Direct-reading dial: Brushed aluminum scale coated with epoxy, with graduations visible on both sides of the indicating tube—no conversion required.
- Polycarbonate construction: Injection-molded, shatter-proof body mounted to a stainless steel backbone for durability and reliable readings.
- Integral flow guides: Prevent float hunting and wandering, ensuring stable, repeatable measurements across the full range.
- Stainless steel valve: Precision metering capability for controlled air adjustments; enables precise flow adjustments with SSV suffix.
- Easy maintenance: Four screws secure the plastic body to the steel frame, allowing quick disassembly for cleaning without tools.
- Wide compatibility: Works with air and other compatible gases or liquids (verify with manufacturer for caustic or aromatic solvents).
Technical Specifications
- Flow Range: 1–10 SCFH (air)
- Accuracy: ±3% of full scale
- Maximum Pressure: 100 PSI (6.9 bar)
- Temperature Limit: 130 °F (54 °C)
- Body Material: Polycarbonate (clear, shatter-proof)
- Float Material: Stainless steel
- Valve Material: Stainless steel (SSV)
- Seals: Neoprene and Buna-N O-rings
- Process Connection: 1/4″ NPTF
- Port Size: 6.35 mm
- Scale Length: 5 inches
- Overall Height: 8.75 inches
- Weight: 13 oz (1 lb)
- Manufacturer: Dwyer Instruments
- Series: RM Rate-Master RMB
Typical Applications
The Dwyer RMB-50-SSV is commonly used in:
- Laboratory and analytical instrumentation for gas flow control
- Test benches and process monitoring equipment
- Low-flow air measurement in pilot plants and small-scale manufacturing
- Medical gas delivery systems and respiratory equipment (with compatible gases)
- HVAC and pneumatic system diagnostics
- Calibration and verification of airflow in low-range applications
Compatibility & Replacements
Compatible With
- Air, nitrogen, argon, and other compatible non-corrosive gases
- Low-flow water and compatible liquids (verify with Dwyer for specific media)
- Pneumatic test equipment and benchtop analytical instruments
- Process control systems requiring visual-only flow indication
Replaces / Drop-In Replacement For
The Dwyer RMB-50-SSV is a specific model within the Rate-Master RMB series. For alternative flow ranges within the same series, consider:
- RMB-52-SSV: 5–50 SCFH range
- RMB-54-SSV: 10–100 SCFH range
- RMB-56-SSV: 50–500 SCFH range
For applications requiring a brass valve instead of stainless steel, the RMB-50-BV is available. Always verify compatibility with your application requirements before substitution.
Works With
- Mechanical pressure gauges and analog monitoring systems
- Laboratory data loggers with visual reference scales
- ISO 9001/ISO 10012 calibration workflows (±3% accuracy supports many industrial standards)
- Compressed air and gas delivery systems from major manufacturers
- Vacuum applications with optional top-mounted valve configuration (RMA series available)
