RS PRO Flow Meter 0.6L/min to 10L/min
RS Stock No. 511-4772
Brand RS Pro
- Category: Flow Sensors
- Connection Type: 3/8 Push On
- Maximum Flow Rate: 10 L/min
AED 311.43
in stock now
RS PRO V10981 Series Flow Meter
RS Stock No. 511-3915
Brand RS Pro
- Category: Flow Sensors
- Current Rating: 10 mA
- Supply Voltage: 4.5 → 24 V dc
AED 2.034.83
in stock now
RS PRO V10980 Series Flow Meter
RS Stock No. 508-2704
Brand RS Pro
- Current Rating: 8 mA
- Maximum Flow Rate: 0.05 → 10 L/min
- Maximum Operating Temperature: +125°C
AED 955.54
in stock now
RS PRO 22N-030-V Series Flow Meter
RS Stock No. 511-3909
Brand RS Pro
- Category: Flow Sensors
- Current Rating: 10 mA
- Minimum Operating Temperature: -25°C
AED 1.972.92
in stock now
RS PRO Flow Meter 0.01L/min to 1L/min, 1/4 in, BSP
RS Stock No. 447-4427
Brand RS Pro
- Device Type: Oval Gear
- Media Monitored: Liquid
- Pipe Diameter Range: 1/4 in
AED 3.501.22
in stock now
RS PRO Flow Meter 0.01L/min to 4L/min, 1/4 in, BSP
RS Stock No. 447-4449
Brand RS Pro
- Maximum Flow Rate: 4 L/min
- Maximum Pressure: 50bar
- Pipe Diameter Range: 1/4 in
AED 3.906.47
in stock now
RS PRO Flow Meter, 1/2 BSP, 1/4 BSP, BSP
RS Stock No. 511-3959
Brand RS Pro
- Current Rating: 10 mA
- Minimum Operating Temperature: -25°C
- Pipe Diameter Range: 1/4 in
AED 2.051.90
in stock now
RS PRO Flow Meter 0.25L/min to 6.5L/min, 1/2 BSP, 1/4 BSP, BSP
RS Stock No. 511-3965
Brand RS Pro
- Connection Type: 1/4 BSP
- Maximum Flow Rate: 6.5 L/min
- Minimum Flow Rate: 0.25 L/min
AED 2.051.90
in stock now
RS PRO 1024 Series Flow Meter 0.5L/min to 15L/min, 1/2 BSP, 1/4 BSP, BSP
RS Stock No. 511-3971
Brand RS Pro
- Device Type: Turbine
- Maximum Operating Temperature: +125°C
- Media Monitored: Liquid
AED 3.040.53
in stock now
Sensirion LG16 Liquid Flow Meter Series Flow Meter
RS Stock No. 898-6738
Brand Sensirion
- Category: Flow Sensors
- Category Link: https://ae.rsdelivers.com/browse/electrical-automation-cables/automation-control-gear/sensors/flow-sensors
- Product Type: Flow Meter
AED 1.337.81
in stock now
Sensirion LG16 Liquid Flow Meter Series Flow Meter
RS Stock No. 173-2224
Brand Sensirion
- Category: Flow Sensors
- Category Link: https://ae.rsdelivers.com/browse/electrical-automation-cables/automation-control-gear/sensors/flow-sensors
- Super Section: Sensors
AED 34.377.70
in stock now
WIKA A2G-25 Series Air Flow Meter Flow Meter for Air
RS Stock No. 262-5498
Brand WIKA
- Device Type: Air flow meter
- Media Monitored: Air
- Series: A2G-25
AED 1.379.43
in stock now
WIKA A2G-25 Series Air Flow Meter Flow Meter for Air
RS Stock No. 262-5501
Brand WIKA
- Category: Flow Sensors
- Device Type: Air flow meter
- Media Monitored: Air
AED 1.627.28
in stock now
SMC PFM711 Series Flow Meter Flow Meter for Fluid, 2L/min Min, 100L/min Max
RS Stock No. 065-5628
Brand SMC
- Category Link: https://ae.rsdelivers.com/browse/electrical-automation-cables/automation-control-gear/sensors/flow-sensors
- Maximum Supply Voltage: 24V dc
- Section: Automation & Control Gear
AED 1.384.66
in stock now
Parker SCFTT Series Turbine Flow Meter Flow Meter for Liquid, 15L/min Min, 600L/min Max
RS Stock No. 017-3984
Brand Parker
- Housing Material: Polymer, Aluminium
- Series: SCFTT
- Super Section: Sensors
AED 7.236.63
in stock now
Sensirion SFM3003 Series Bi-Directional Flow Meter Flow Meter for Air, -150L/min Min, 300L/min Max
RS Stock No. 230-7721
Brand Sensirion
- Media Monitored: Air, Gas
- Minimum Flow Rate: -150 l/min
- Series: SFM3003
AED 11.713.61
in stock now
Sensirion SFM3003 Series Bi-Directional Flow Meter Flow Meter for Air, -150L/min Min, 300L/min Max
RS Stock No. 230-7722
Brand Sensirion
- Maximum Flow Rate: 300 L/min
- Media Monitored: Air, Gas
- Supply Voltage: 2.7 → 5.5 V
AED 653.03
in stock now
Sensirion SFM3003 Series Bi-Directional Flow Meter Flow Meter for Air, -30L/min Min, 300L/min Max
RS Stock No. 230-7723
Brand Sensirion
- Category: Flow Sensors
- Maximum Flow Rate: 300 L/min
- Supply Voltage: 2.7 → 5.5 V
AED 11.716.98
in stock now
Sensirion SFM3003 Series Bi-Directional Flow Meter Flow Meter for Air, -30L/min Min, 300L/min Max
RS Stock No. 230-7725
Brand Sensirion
- Device Type: Bidirectional Flow Meter
- Minimum Flow Rate: -30 l/min
- Supply Voltage: 2.7 → 5.5 V
AED 13.630.30
in stock now
Sensirion SFM3003 Series Bi-Directional Flow Meter Flow Meter for Air, -30L/min Min, 300L/min Max
RS Stock No. 230-7724
Brand Sensirion
- Maximum Flow Rate: 300 L/min
- Minimum Flow Rate: -30 l/min
- Supply Voltage: 2.7 → 5.5 V
AED 588.26
in stock now
Sensirion SFM3003 Series Bi-Directional Flow Meter Flow Meter for Air, -30L/min Min, 300L/min Max
RS Stock No. 230-7726
Brand Sensirion
- Category: Flow Sensors
- Device Type: Bidirectional Flow Meter
- Series: SFM3003
AED 683.93
in stock now
Sensirion, LG16 Liquid Flow Meter Series Connectivity Kit for Use with Liquid Flow Meter, RoHS, REACH, WEEE Standard
RS Stock No. 200-9557
Brand Sensirion
- Product Type: Adapter
- Section: Automation & Control Gear
- Series: LG16 Liquid Flow Meter
AED 326.60
in stock now
Sensirion, LG16 Liquid Flow Meter Series Connectivity Kit for Use with Liquid Flow Meter, REACH, RoHS, WEEE Standard
RS Stock No. 200-9558
Brand Sensirion
- Accessory Type: Connectivity Kit
- Product Type: Connectivity Kit
- Section: Automation & Control Gear
AED 226.89
in stock now
Sensirion SFM3200 Series Digital Flow Meter Flow Meter for Air, Oxygen and Other Nonaggressive Gases, 100L/min Min
RS Stock No. 174-9067
Brand Sensirion
- Category: Flow Sensors
- Maximum Media Temperature: +50°C
- Series: SFM3200
AED 754.32
in stock now
...
What is a flow meter?
How do flow meters work across different technologies?
- Magnetic (electromagnetic) flow meter: Measures flow by generating a magnetic field across a conductive liquid. The moving fluid induces a voltage proportional to velocity, which is converted to volumetric flow rate. Ideal for water and many chemical liquids with good conductivity; not suitable for truly insulating fluids.
- Ultrasonic flow meter: Uses transit-time or Doppler principles. Transit-time meters send ultrasonic pulses upstream and downstream; the difference in arrival times gives velocity and flow. Doppler meters detect frequency shifts caused by particulates or bubbles. Useful for a wide range of fluids, including non-contact measurements and dirty liquids.
- Turbine (mechanical) flow meter: A rotor or turbine spins with the flow; the rotation rate is proportional to flow. Best for clean, low-viscosity liquids and precise, local measurements.
- Coriolis flow meter: Measures mass flow by detecting the deflection of a vibrating tube. Extremely accurate for liquids and gases, independent of density and viscosity, but typically higher in cost and installation complexity.
- Differential pressure (venturi, orifice) flow meter: Uses a pressure drop across a restriction (venturi or orifice plate). Flow rate is inferred from the differential pressure and fluid properties. Widely used, cost-effective for a range of liquids and gases.
What are the main types of flow meters and which fluids are they best for?
- Magnetic flow meters (mag meters): Best for conductive liquids like water, wastewater, slurries, acids. No moving parts, low maintenance, good for dirty liquids; not suitable for non-conductive fluids like pure hydrocarbons.
- Ultrasonic flow meters: Inline or clamp-on for liquids and gases; great for dirty, high-purity, or sterile processes. Ultrasonic meters are versatile for water, chemicals, and HVAC applications.
- Turbine flow meters: Excellent for clean, low-viscosity liquids; high accuracy and fast response but sensitive to particulate matter and viscosity.
- Coriolis flow meters (mass flow): Unmatched for mass flow and density; suitable for chemicals, fuels, and precise custody-transfer applications. Higher cost and installation considerations.
- Differential pressure meters (venturi, orifice): Broad applicability; cost-effective for a wide range of fluids, including gases and liquids; require known fluid properties for accurate calculations.
- Vortex, thermal, and other technologies: Niche applications, including gas flow, viscous liquids, and specialized industrial settings.
How do I choose the right flow meter for water, chemicals, or gases?
- Conductivity of liquids for mag meters; presence of particulates for turbine meters; gas versus liquid considerations for ultrasonic meters. Chemical compatibility and temperature limits matter for all technologies.
- Heavier or more viscous fluids may require magnetic or ultrasonic solutions over turbine meters.
- Inline meters offer compact, high-accuracy measurements; insertion meters can be easier to retrofit into existing piping.
- Food & beverage and pharma require sanitary fittings, cleanability, and clean-in-place (CIP) capabilities.
- Decide between digital displays, 4–20 mA emission, HART, FOUNDATION Fieldbus, or IIoT-enabled meters for remote monitoring.
- Consider maintenance intervals, sensor cleaning needs, and calibration traceability.
Where should a flow meter be installed and what installation considerations matter?
- Install flow meters in straight runs free of turbulence; use upstream and downstream straight piping per manufacturer guidance to minimize flow disturbances.
- Ensure compatible materials for wetted parts; consider temperature and pressure ratings for the process fluid.
- Position instruments for easy access, electrical connection, and maintenance; for inline meters, ensure proper orientation and flow direction.
- For magnetic meters, ensure sufficient liquid conductivity; for ultrasonic meters, ensure accessible mounting for clamp-on versions if used.
- Sanitary installations require clean-in-place (CIP) or sanitary fittings and proper sanitary gaskets to avoid contamination.
- Account for pressure loss and energy impact; select meters with acceptable pressure drop for the system.
How accurate are flow meters and how is calibration performed?
- Use reference standards or calibrated test rigs to establish a baseline.
- Perform dry-run checks with non-flow verification to ensure signals are behaving correctly.
- Apply periodical recalibration or validation against known flow standards; ensure calibration certificates are traceable to national or international standards (e.g., ISO, ASTM).
- Document installation parameters (temperature, pressure, viscosity) during calibration, as some meters have performance curves dependent on these factors.
What maintenance, troubleshooting, and common issues should I know about flow meters?
- Particulate build-up or fouling in turbine or ultrasonic sensors can alter readings; schedule regular cleaning or filter changes.
- Air entrainment, bubbles, or gas pockets may affect ultrasonic/differential pressure meters; verify installation and fluid properties.
- Electrical wiring, grounding, and signal interference can cause noisy data; check cable integrity and shielded connections.
- Low conductivity fluids can disable magnetic meters; choose the correct technology for the fluid and consider bypass options.
- Calibration drift due to temperature, viscosity changes, or aging seals; perform periodic checks and replace worn components as needed.
Can I buy flow meters from RS Components and what should I look for on a listing page?
- Technology type (magnetic flow meter, ultrasonic flow meter, coriolis, turbine, differential pressure)
- Measuring range and accuracy specification, with units (L/min, m3/h, GPM, kg/s for mass flow)
- Fluid compatibility and wetted materials (stainless steel, wetted seals, PTFE, etc.)
- Electrical output (4–20 mA, HART, FOUNDATION Fieldbus, Modbus, digital interfaces) and connector type
- Pressure rating, temperature limits, and sanitary design if applicable
- Installation style (inline vs insertion), process compatibility, and required straight-run lengths
- Calibration information, traceability, and available accessories (bypass, sensors, display modules)