SR41 Metal Tube Rotameter Manufacturers

The SR41 Rotameter is an all-metal Variable Area (VA) flowmeter designed for accurate measurement of liquids, gases, and steam. It is widely used in industries including oil & gas, chemical processing, metallurgy, power generation, food & beverage, pharmaceuticals, and pulp & paper.

The SR41 Rotameter features a fully metallic construction with an integrally formed conical measuring tube, providing exceptional mechanical strength, long-term stability, and resistance to process stress. Its modular and intelligent indicator design, combined with a compact footprint and short float travel, ensures reliable measurement even in space-constrained installations.

With a low pressure loss profile, high-temperature and high-pressure capability, and extensive use of corrosion-resistant materials, the SR41 Rotameter is ideally suited for harsh operating environments and aggressive media. A newly developed magnetic coupling transmission system ensures stable signal output while maintaining complete isolation between the measuring chamber and the indication or transmission unit.

• All-metal Variable Area Rotameter for liquid, gas, and steam measurement

• One-piece formed conical measuring tube for enhanced mechanical robustness

• Modular, intelligent indicator design for flexible configuration

• Compact structure with short stroke and reduced installation space

• Low pressure loss for improved system efficiency

• Advanced magnetic coupling transmission for stable and reliable signal output

• Designed for high-temperature and high-pressure applications

• Corrosion-resistant materials suitable for harsh and aggressive media

• Intelligent LCD display supporting:

• Instantaneous and totalized flow indication

• 4–20 mA analog output

• Switch signal output

• High and low alarm functions

• HART communication protocol

• Multiple power supply options: 24 VDC or battery-powered

• Multi-stage correction for viscosity, density, temperature, and pressure

• Optional magnetic filter or thermal insulation / heating jacket available upon request

• Measured Media: Gas / Liquid / Steam

• Accuracy Class: Class 1.5 / Class 2.5

• Flow Range Ratio: 20:1

• Nominal Diameter: DN15 to DN100 (15–100 mm)

• Maximum Working Pressure:

  1.6 MPa / 2.5 MPa / 4.0 MPa /

  Class 150 / Class 300 / Class 600 / Class 900

• Flow Measurement Range:

• Water (20 °C): 2.5 to 100,000 L/h

• Air (0.1 MPa, 20 °C): 0.07 to 1,000 m³/h

• Applicable Viscosity:

• DN15: ≤ 5 mPa·s

• DN25–DN100: ≤ 350 mPa·s

• Measuring Principle: Variable Area (VA)

• Measuring Tube Type: Conical metal tube

• Scale Graduation: Calibrated according to selected flow units

Process Temperature Range

• Local indication / Remote transmitter / PTFE-lined: –130 to +80 °C

• Local indication / Remote transmitter: –130 to +250 °C

• High-temperature local indication version: –130 to +350 °C

Wetted Materials

• Measuring tube & float materials:

  304 / 304L / 316 / 316L / Hastelloy C /

  Stainless steel with PTFE lining / Inconel / Monel

Process Connection

• Flanged connection

• Sanitary (hygienic) connection

Installation Orientation & Flow Direction

• Vertical installation: bottom inlet, top outlet

• Horizontal installation: left-to-right or right-to-left

• Side inlet to side outlet

• Bottom inlet to side outlet

Electrical & Communication

• Ingress Protection: IP67

• Power Supply Options: None / 24 VDC / Battery-powered

• Output Signal: Local indication / 4–20 mA

• Communication Protocol: HART

• Electrical Cable Entry: M20×1.5, 1/2"-14 NPT

Explosion Protection

• Non-Ex

• Intrinsically safe (Ex ia)

• Flameproof (Ex d)

Ambient Conditions

• Ambient Temperature: –25 to +60 °C

• Relative Humidity: 5% to 90%

Self-Diagnostic Functions

• Float sticking detection

• Pointer sticking detection

• Float magnetic field abnormality detection

• Zero-point deviation detection

• Abnormal flow fluctuation detection

• Flow over-limit detection

• 4–20 mA output accuracy diagnostics

• Parameter configuration error detection

• Core electronics operating status diagnostics

• Totalizer error diagnostics

• Upper and lower flow alarm diagnostics