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. 395-6978
Fabrikantnummer166703
FabrikantGems Sensors
€ 44,80
Each
Aantal stuks
Liquid Piston - 2 L/min 120 → 240 V ac/dc 1/4 in 1/4 BSP 10bar Noryl - +100°C - +100°C -
RS-stocknr. 780-0282
FabrikantnummerFSVPLC30
FabrikantCynergy3
€ 88,89
Each
Aantal stuks
Liquid In-line - 80 L/min 5 V ac G1 1 BSP Female 8bar Brass - +85°C - +85°C -
RS-stocknr. 361-0206
Fabrikantnummer2530A4L71BVBN
FabrikantKey Instruments
€ 226,73
Each
Aantal stuks
Liquid Variable Area 1.5 L/min 20 L/min - 1/4 in 1/4 NPT Female 6.89bar Acrylic - +65°C - +65°C -
RS-stocknr. 780-0122
FabrikantnummerLFS-03
FabrikantCynergy3
€ 258,28
Each
Aantal stuks
- Paddle 15.2 L/min, 19 L/min 60.6 L/min, 83.3 L/min 230 V 1 → 3 in 1 NPT 20bar Aluminium Alloy - - -30°C +150°C 1 A
RS-stocknr. 186-0049
FabrikantnummerEF7731110220
FabrikantParker UCC
€ 132,80
Each
Aantal stuks
Liquid Variable Area 1 L/min 15 L/min - 1 in 1 BSP Female 10bar PET - - +5°C +60°C -
RS-stocknr. 198-0660
FabrikantnummerFM.26 122 129
FabrikantParker
€ 273,21
Each
Aantal stuks
Liquid Variable Area 0.2 L/min 2 L/min - 1/4 in 1/4 BSP - Brass - - - +90°C -
RS-stocknr. 804-4036
Fabrikantnummer7ME6520-4HC13-2AA1
FabrikantSiemens
€ 1.296,90
Each
Aantal stuks
Liquid Electromagnetic 0 m/s 10 m/s - 6 in 1/2 NPT 16bar Carbon Steel - - -40°C +70°C -
RS-stocknr. 744-0705
FabrikantnummerPFM725S-C6-A-W
FabrikantSMC
€ 230,03
Each
Aantal stuks
Dry Air, Gas Integrated Display 0.5 L/min 25 L/min 24 V dc 6 mm One-Touch Fitting 750kPa PBT 0 °C +50°C 0°C +50°C -
RS-stocknr. 123-7149
FabrikantnummerSFM3000-200C
FabrikantSensirion
€ 113,42
Each
Aantal stuks
Gas Low Pressure Drop -200 slm 200 slm 5 V 22 mm 2-Wire I2C 1.3bar Epoxy, Gold, Polyurethane, PPE+PS Blend, Si, Si3n4, Siox, Stainless Steel (Annealed) -20 °C +80°C -20°C +80°C -
RS-stocknr. 407-568
FabrikantnummerAWM2300V
FabrikantHoneywell
€ 105,79
Each
Aantal stuks
Dry Gas Unamplified -1000 sccm 1000 cm³/min 15 V dc 0.2 in - 25psi Plastic - - -25°C +85°C -
RS-stocknr. 286-260
FabrikantnummerEF.7731111290
FabrikantParker
€ 131,78
Each
Aantal stuks
Liquid Variable Area 2 L/min 30 L/min - 1 in 1 BSP Female 10bar PET - - +5°C +60°C -
RS-stocknr. 780-0113
FabrikantnummerLFS-02
FabrikantCynergy3
€ 284,62
Each
Aantal stuks
- Paddle 15.2 L/min, 19 L/min 60.6 L/min, 83.3 L/min 230 V 1 → 3 in 3/4 BSP 20bar Aluminium Alloy - - -30°C +150°C 1 A
RS-stocknr. 447-4449
FabrikantRS PRO
€ 378,54
Each
Aantal stuks
Liquid Oval Gear 0.01 L/min 4 L/min 5 → 24 V dc 1/4 in 1/4 BSP 50bar Stainless Steel - - - - -
RS-stocknr. 446-8292
Fabrikantnummer173037-C
FabrikantGems Sensors
€ 101,55
Each
Aantal stuks
Liquid Turbine 1 L/min 10 L/min 5 → 24 V dc 3/8 in 3/8 BSP 200psi Nylon 12 - - -20°C +100°C -
RS-stocknr. 361-0161
Fabrikantnummer2530A4A72BVBN
FabrikantKey Instruments
€ 226,73
Each
Aantal stuks
Gas Variable Area 14 L/min 140 L/min - 1/4 in 1/4 NPT Female 6.89bar Acrylic - +65°C - +65°C -
RS-stocknr. 613-4216
FabrikantRS PRO
€ 177,29
Each
Aantal stuks
Gas, Liquid Paddle 4 L/min 5.5 L/min 250 V ac 10 mm 3/8 BSP Female 25bar Nickel Plated Brass - +110°C - +110°C 5 A
RS-stocknr. 456-3066
FabrikantnummerSF5200
Fabrikantifm electronic
€ 163,20
Each
Aantal stuks
Gas, Liquid Modular Flow Monitoring 3 (Liquids) ccm/s, 200 (Gases) ccm/s 300 (Liquids) cm³/s, 3000 (Gases) cm³/s - - M18 x 1.5 300bar Stainless Steel -25 (Gases) °C, -25 (Liquids) °C +80°C - - -
RS-stocknr. 740-6436
FabrikantnummerSU7000
Fabrikantifm electronic
€ 635,21
Each
Aantal stuks
Liquid Ultrasonic 0 L/min 50 L/min 19 → 30 V dc - 3/4 BSP 16bar Aluminium Alloy -10 °C +80°C -10°C +60°C -
RS-stocknr. 510-0571
FabrikantRS PRO
€ 230,47
Each
Aantal stuks
Liquid Piston Inline 0.5 L/min 3 L/min 200 V ac 1/4 in 1/4 BSP 300bar Brass - +100°C - +120°C 1 A
RS-stocknr. 446-8309
Fabrikantnummer173939-C
FabrikantGems Sensors
€ 101,55
Each
Aantal stuks
Liquid Turbine 1 L/min 15 L/min 5 → 24 V dc 3/8 in 3/8 BSP 200psi Nylon 12 - - -20°C +100°C -