Flow Sensors

Flow sensors or flow indicators are flow meter devices used to measure the amount of liquid, gas or vapour that passes through them. They can also be known as flow gauges or liquid meters. Flow sensors are available as time measuring units (these measure flow rates over a set time period) or they can be totalising flow meters that continually measure the medium passed through.

Flow sensors consist of a primary medium connection device, transducer and transmitter. The transducer senses the fluid that passes through the primary device. The transmitter produces an output signal from the raw transducer signal.

Types of Flow Sensor

Paddlewheel Flow Sensors or Turbine: One of the most common types of flow sensor. The sensors are connected to a pipe with liquid passing through and turning a paddle wheel, the primary device calculates the speed as the paddle is turned. This simple structure is compact and can perform a large-capacity measurement. Disadvantages are clogging and maintenance is required to cope with the axial wear otherwise the paddle needs replacing.

Variable Area Flow Sensors also known as Rotaflow meters: identified by their tapered tube and float designs. Widely used for gases and liquids flow measurement because of its low cost, simplicity, low-pressure drop and linear output.

Magnetic-Inductive Sensors: This type of sensor detects three process categories, volumetric flow quantity, consumed quantity and medium temperature.

Applications for Flow Sensors

Each type of flow sensor has its own specific applications and installation constraints. There is no one size fits all flow meter. The way to select the right flow meter is to think about the application as a guide, not the technology. Many of the technologies work well on many applications. Starting with the application will help to select the technology based on accuracy, cost, durability and reliability, rather than trying to make the technology fit the application you have. Can include the following applications:

  • Water treatment
  • Cooling systems
  • Industrial Washing Systems
  • Irrigation

Things to consider:

  • What is the fluid being measured, if not water what is its viscosity?
  • Rate measurement or summation?
  • Display or signal output?
  • What is the minimum and maximum flow rate, process pressure and process temperature?

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Omschrijving Prijs Media Monitored Device Type Minimum Flow Rate Maximum Flow Rate Supply Voltage Pipe Diameter Range Connection Type Maximum Pressure Material Minimum Media Temperature Maximum Media Temperature Minimum Operating Temperature Maximum Operating Temperature Current Rating
RS-stocknr. 446-8315
Fabrikantnummer173940-C
FabrikantGems Sensors
€ 101,55
Each
Aantal stuks
Liquid Turbine 2 L/min 30 L/min 5 → 24 V dc 3/8 in 3/8 BSP 200psi Nylon 12 - - -20°C +100°C -
RS-stocknr. 511-4772
FabrikantRS PRO
€ 48,46
Each
Aantal stuks
Liquid Flow Meter 0.6 L/min 10 L/min 4.5 → 24 V dc 3/8 in 3/8 Push On 10bar PVDF - - 0°C +125°C 10 mA
RS-stocknr. 198-2919
FabrikantnummerMR3A14BVBN
FabrikantKey Instruments
€ 72,62
Each
Aantal stuks
Gas Variable Area 0.4 L/min 5 L/min - 1/8 in 1/8 NPT Female 6.9bar Polycarbonate - +65°C - +65°C -
RS-stocknr. 395-6827
Fabrikantnummer155420BSPP
FabrikantGems Sensors
€ 71,90
Each
Aantal stuks
Liquid RotorFlow 2 L/min 20 L/min - 1/4 in 1/4 BSP Female 6.9bar Polypropylene -29 °C +82°C -29°C +82°C -
RS-stocknr. 257-149
FabrikantRS PRO
€ 46,77
Each
Aantal stuks
Liquid Radial Flow Turbine 0.25 L/min 6.5 L/min 4.5 → 16 V dc 15 mm - 20bar Acetal Copolymer - - -40°C +70°C 10 mA
RS-stocknr. 198-2931
FabrikantnummerMR3A15BVBN
FabrikantKey Instruments
€ 72,62
Each
Aantal stuks
Gas Variable Area 1 L/min 10 L/min - 1/8 in 1/8 NPT Female 6.9bar Polycarbonate - +65°C - +65°C -
RS-stocknr. 740-6424
FabrikantnummerSM7000
Fabrikantifm electronic
€ 588,80
Each
Aantal stuks
Liquid Magnetic-Inductive 0.2 L/min 50 L/min 19 → 30 V dc - 3/4 BSP 16bar PBT, Stainless Steel -20 °C +80°C -10°C +60°C -
RS-stocknr. 256-297
FabrikantnummerS.800002
FabrikantParker
€ 78,57
Each
Aantal stuks
Liquid Variable Area 1.5 L/min 10 L/min - 3/4 in 3/4 BSP 10bar - - - - +60°C -
RS-stocknr. 186-0027
FabrikantnummerEF.7731113290
FabrikantParker
€ 134,42
Each
Aantal stuks
Liquid Variable Area 5 L/min 100 L/min - 1 in 1 BSP Female 10bar PET - - +5°C +60°C -
RS-stocknr. 256-578
€ 66,89
Each
Aantal stuks
Liquid Control Valve 3 L/min 6 L/min 240 V ac 22 mm - 10bar - +5 °C +85°C +5°C +70°C -
RS-stocknr. 448-7445
FabrikantnummerMR3A16BVBN
FabrikantKey Instruments
€ 62,90
Each
Aantal stuks
Gas Variable Area 2 L/min 30 L/min - 1/8 in 1/8 NPT Female 6.9bar Polycarbonate - +65°C - +65°C -
RS-stocknr. 744-0913
FabrikantnummerPFM710S-C4-A-W
FabrikantSMC
€ 230,03
Each
Aantal stuks
Dry Air, Gas Integrated Display 0.2 L/min 10 L/min 24 V dc 4 mm One-Touch Fitting 750kPa PBT 0 °C +50°C 0°C +50°C -
RS-stocknr. 256-281
FabrikantnummerS.800001
FabrikantParker
€ 78,57
Each
Aantal stuks
Liquid Variable Area 0.2 L/min 2 L/min - 3/4 in 3/4 BSP 10bar - - - - +60°C -
RS-stocknr. 623-7927
FabrikantnummerAWM43300V
FabrikantHoneywell
€ 110,84
Each
Aantal stuks
Dry Gas Amplified - 1000 cm³/s 15 V dc 0.246 in - 150psi Plastic - - -25°C +85°C -
RS-stocknr. 395-6833
Fabrikantnummer155480BSPP
FabrikantGems Sensors
€ 71,90
Each
Aantal stuks
Liquid RotorFlow 15 L/min 75 L/min - 1/2 in 1/2 BSP Female 6.9bar Polypropylene -29 °C +82°C -29°C +82°C -
RS-stocknr. 448-7451
FabrikantnummerMR3A17BVBN
FabrikantKey Instruments
€ 62,90
Each
Aantal stuks
Gas Variable Area 4 L/min 50 L/min - 1/8 in 1/8 NPT Female 6.9bar Polycarbonate - +65°C - +65°C -
RS-stocknr. 395-6849
Fabrikantnummer142541BSPP
FabrikantGems Sensors
€ 121,25
Each
Aantal stuks
Liquid RotorFlow 2 L/min 20 L/min - 1/4 in 1/4 BSP Female 13.8bar Brass - - -29°C +100°C -
RS-stocknr. 780-0289
FabrikantnummerFSVPLC06
FabrikantCynergy3
€ 88,89
Each
Aantal stuks
Liquid In-line 0.6 L/min 80 L/min 5 V ac G1 1 BSP Female 8bar Brass - +85°C - +85°C -
RS-stocknr. 395-9337
Fabrikantnummer142542BSPP
FabrikantGems Sensors
€ 121,20
Each
Aantal stuks
Liquid RotorFlow 15 L/min 75 L/min - 1/2 in 1/2 BSP Female 13.8bar Brass -29 °C +100°C -29°C +100°C -
RS-stocknr. 907-3773
Fabrikantnummer26941
FabrikantGems Sensors
€ 527,85
Each
Aantal stuks
Gas, Liquid Piston - 0.045 gal/min - 1/4 in 1/4 NPT Female 69bar Brass - - -29°C +148.9°C -