Overview
The Dwyer RMC-108 air flow meter is a Rate-Master® variable area flowmeter designed for straightforward, dependable measurement of compressed air and gas flow rates. With a direct-reading scale spanning 200–1800 SCFH and ±2% accuracy, this meter eliminates the need for calculation or conversion—the float position directly indicates flow. Its robust construction and modular design make it ideal for panel mounting, process control, and equipment commissioning in industrial and commercial pneumatic systems.
Key Features
- Direct-reading scale: Brushed aluminum scale coated with epoxy, dual-sided graduations for clarity from any viewing angle
- Precision float stabilization: Integral flow guides keep the float steady throughout the entire range, eliminating hunting or wandering
- Transparent body design: Injection-molded, shatter-proof polycarbonate around a precision tapered pin for durability and visibility
- Modular construction: Bodies can be instantly interchanged within the RM series without disturbing piping or system configuration
- Stainless steel backbone: Rigid single-piece construction mounted to welded pipe thread inserts to absorb piping torque safely
- Optional metering valves: Available with brass or stainless steel precision metering valves for fine flow adjustment
Technical Specifications
- Flow Range: 200–1800 SCFH (standard cubic feet per hour) air
- Scale Size: 10 inches (254 mm)
- Accuracy: ±2% of full scale
- Maximum Operating Pressure: 100 psi (6.9 bar)
- Maximum Operating Temperature: 130°F (54°C)
- Process Connection: 1/2″ (NPT, standard)
- Body Material: Polycarbonate, clear
- Seals: Neoprene and Buna-N O-rings
- Wetted Metal Parts: Stainless steel (standard), with optional brass or stainless steel metering valve
- Float Material: Stainless steel, black glass, aluminum, K monel, or tungsten carbide (varies by range)
- Weight: 39 oz (1.1 kg)
- Mounting: Panel or surface mount
Typical Applications
The Dwyer RMC-108 is widely used in compressed air systems, pneumatic equipment control, HVAC balancing, laboratory gas flow measurement, and industrial process monitoring. Its reliable, easy-to-read output makes it suitable for:
- Compressed air line monitoring and balancing
- Pneumatic tool and equipment flow verification
- Process control loop feedback in manufacturing
- Air compressor outlet flow verification
- Portable test equipment and system commissioning
- Equipment performance baseline documentation
Compatibility & Replacements
Compatible With
- Standard 1/2″ NPT pneumatic systems and compressed air networks
- Industrial pneumatic valve blocks and manifolds
- Panel-mounted control cabinets and gauges
- Compressed air supply lines up to 100 psi
- Gases and non-corrosive liquids within rated pressure and temperature
Replaces / Drop-In Replacement For
- Earlier Dwyer RMC-108 models with worn or illegible scales
- Other Rate-Master® 10″ scale flowmeters in equivalent range brackets
- Verify specific interchangeability with your original equipment documentation before ordering
Works With
- Any ISO 1219 or ANSI pneumatic schematic standard system
- Manual and automated compressed air control loops
- Panel mount kits and bracket assemblies (sold separately)
- Optional brass valve (RMC-108-BV) or stainless steel valve (RMC-108-SSV) variants for integrated metering control
- Rate-Master® Series RM body interchangeability with other scale sizes (2″, 5″ also available)
