Flow Sensors & Indicators

Flow sensors and flow indicators are flowmeter 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, that 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 Sensors and Indicators


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 large-capacity measurement. Disadvantages are clogging and maintenance is required to cope with the axial wear otherwise the paddle needs replacing.


Rotaflow or Variable Area Flow Sensors: Rotaflow meters are a tapered tube and a float. It is most 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 flowmeter. The way to select the right flowmeter 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 totalisation?

  • Display or signal output?

  • What is the minimum and maximum flowrate, process pressure and process temperature?

  • Size of the pipe

...
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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. 198-2896
FabrikantnummerMR3A12BVBN
FabrikantKey Instruments
70,50 €
Each
Aantal stuks
Gas Variable Area 0.05 L/min 0.5 L/min - 1/8 in 1/8 NPT Female 6.9bar Polycarbonate - +65°C - +65°C -
RS-stocknr. 123-7149
FabrikantnummerSFM3000-200C
FabrikantSensirion
85,58 €
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. 395-6883
Fabrikantnummer156262BSPP
FabrikantGems Sensors
173,00 €
Each
Aantal stuks
Liquid RotorFlow Electronic 15 L/min 75 L/min 4.5 → 24 V dc 1/2 in 1/2 BSP Female 13.8bar Brass -29 °C +100°C -29°C +100°C -
RS-stocknr. 740-6433
FabrikantnummerSM8000
Fabrikantifm electronic
659,60 €
Each
Aantal stuks
Liquid Magnetic-Inductive 0.2 L/min 100 L/min 19 → 30 V dc - 1 BSP 16bar PBT, Stainless Steel -20 °C +80°C -10°C +60°C -
RS-stocknr. 198-2975
FabrikantnummerFR2A12BVBN
82,73 €
Each
Aantal stuks
Gas, Liquid Variable Area 0.04 L/min 0.5 L/min - 1/8 in 1/8 NPT Female 7bar Acrylic - +65°C - +65°C -
RS-stocknr. 740-6424
FabrikantnummerSM7000
Fabrikantifm electronic
571,70 €
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. 446-8286
Fabrikantnummer173936-C
FabrikantGems Sensors
90,78 €
Each
Aantal stuks
Liquid Turbine 0.5 L/min 5 L/min 5 → 24 V dc 3/8 in 3/8 BSP 200psi Nylon 12 - - -20°C +100°C -
RS-stocknr. 361-0199
FabrikantnummerFR4L69BVBN
FabrikantKey Instruments
220,13 €
Each
Aantal stuks
Liquid Variable Area 0.8 L/min 9 L/min - 1/4 in 1/4 NPT Female 6.89bar Acrylic - +65°C - +65°C -
RS-stocknr. 198-2981
FabrikantnummerFR2A13BVBN
FabrikantKey Instruments
89,95 €
Each
Aantal stuks
Gas Variable Area 0.1 L/min 1 L/min - 1/8 in 1/8 NPT Female 6.89bar Acrylic - +65°C - +65°C -
RS-stocknr. 395-6861
Fabrikantnummer155481BSPP
FabrikantGems Sensors
126,00 €
Each
Aantal stuks
Liquid RotorFlow Electronic 15 L/min 75 L/min 4.5 → 24 V dc 1/2 in 1/2 BSP Female 6.9bar Polypropylene -29 °C +82°C -29°C +82°C -
RS-stocknr. 257-133
FabrikantRS PRO
44,09 €
Each
Aantal stuks
Liquid Radial Flow Turbine 1.5 L/min 30 L/min 4.5 → 16 V dc 15 mm - 20bar Acetal Copolymer - - -40°C +70°C 10 mA
RS-stocknr. 511-4772
FabrikantRS PRO
45,68 €
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. 198-2969
FabrikantnummerMR3L11BVBN
FabrikantKey Instruments
70,50 €
Each
Aantal stuks
Liquid Variable Area 20 ccm 300 cm³/min - 1/8 in 1/8 NPT Female 6.9bar Polycarbonate - +65°C - +65°C -
RS-stocknr. 907-3928
Fabrikantnummer70824
FabrikantGems Sensors
115,78 €
Each
Aantal stuks
Liquid Piston - 1 gal/min - 1/4 in 1/4 NPT Female 69bar Brass - - -29°C +93.3°C -
RS-stocknr. 446-8309
Fabrikantnummer173939-C
FabrikantGems Sensors
90,78 €
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 -
RS-stocknr. 725-9965
FabrikantnummerUF25B100
FabrikantCynergy3
239,62 €
Each
Aantal stuks
Liquid Sensor/Switch without Indicator 0.5 L/min 25 L/min 7.5 → 26 V dc 10 mm 3/8 BSP 10bar ABS -10 °C +85°C -10°C +85°C -
RS-stocknr. 395-9337
Fabrikantnummer142542BSPP
FabrikantGems Sensors
117,70 €
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. 446-8292
Fabrikantnummer173037-C
FabrikantGems Sensors
90,78 €
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. 395-6877
Fabrikantnummer156261BSPP
FabrikantGems Sensors
173,00 €
Each
Aantal stuks
Liquid RotorFlow Electronic 2 L/min 20 L/min 4.5 → 24 V dc 1/4 in 1/4 BSP Female 13.8bar Brass -29 °C +100°C -29°C +100°C -
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 -
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