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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Beskrivning Pris 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-artikelnummer 395-6827
Tillv. art.nr155420BSPP
VarumärkeGems Sensors
672,78 kr
Each
Enheter
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-artikelnummer 446-8286
Tillv. art.nr173936-C
VarumärkeGems Sensors
900,82 kr
Each
Enheter
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-artikelnummer 906-7765
Tillv. art.nrVFA-3
VarumärkeDWYER INSTRUMENTS
389,15 kr
Each
Enheter
Air Variable Area 0.6 SCFH 5 SCFH - 1/8 in 1/8 NPT Female 6.9 (With Valve) bar, 10 (Without Valve) bar Acrylic Plastic - +38 (Without Valve) °C, +48 (With Valve) °C - - -
RS-artikelnummer 123-7149
Tillv. art.nrSFM3000-200C
VarumärkeSensirion
912,92 kr
Each
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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-artikelnummer 198-2903
Tillv. art.nrMR3A13BVBN
VarumärkeKey Instruments
699,62 kr
Each
Enheter
Gas Variable Area 0.1 L/min 1.2 L/min - 1/8 in 1/8 NPT Female 6.9bar Polycarbonate - +65°C - +65°C -
RS-artikelnummer 740-6424
Tillv. art.nrSM7000
Varumärkeifm electronic
6 289,00 kr
Each
Enheter
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-artikelnummer 616-2693
Tillv. art.nr212460E
VarumärkeGems Sensors
721,90 kr
Each
Enheter
Liquid Turbine 0.026 gal/min 0.65 gal/min 5 → 24 V dc 1/4 in 1/4 BSP Male 24bar Nylon 12 - - -20°C +100°C -
RS-artikelnummer 907-3959
Tillv. art.nr155420
VarumärkeGems Sensors
648,32 kr
Each
Enheter
Fluid, Liquid RotorFlow 0.1 gal/min 5 gal/min - 1/4 in 1/4 NPT Female 6.9bar Polypropylene - +21°C -29°C +82°C -
RS-artikelnummer 257-149
VarumärkeRS PRO
450,64 kr
Each
Enheter
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-artikelnummer 407-596
Tillv. art.nrAWM3300V
VarumärkeHoneywell
1 079,91 kr
Each
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Dry Gas Amplified -1000 sccm 1000 cm³/min 15 V dc 0.2 in - 25psi Plastic - - -25°C +85°C -
RS-artikelnummer 906-7793
Tillv. art.nrVFA-9
VarumärkeDWYER INSTRUMENTS
389,15 kr
Each
Enheter
Air Variable Area 20 SCFH 200 SCFH - 1/8 in 1/8 NPT Female 6.9 (With Valve) bar, 10 (Without Valve) bar Acrylic Plastic - +38 (Without Valve) °C, +48 (With Valve) °C - - -
RS-artikelnummer 511-3965
VarumärkeRS PRO
3 039,05 kr
Each
Enheter
Liquid Turbine 0.25 L/min 6.5 L/min 4.5 → 24 V dc 1/4 in 1/4 BSP 10bar Stainless Steel - - -25°C +125°C -
RS-artikelnummer 740-6433
Tillv. art.nrSM8000
Varumärkeifm electronic
7 255,00 kr
Each
Enheter
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-artikelnummer 907-3953
Tillv. art.nr155421
VarumärkeGems Sensors
1 289,60 kr
Each
Enheter
Liquid RotorFlow Electronic 0.1 gal/min 5 gal/min 4.5 → 24 V dc 1/4 in 1/4 NPT Female 6.9bar Ploypropylene - +21°C -29°C +82°C 8 mA
RS-artikelnummer 511-3971
VarumärkeRS PRO
4 973,63 kr
Each
Enheter
Liquid Turbine 0.5 L/min 15 L/min 4.5 → 24 V dc 1/2 in 1/2 BSP 10bar Stainless Steel - - -25°C +125°C -
RS-artikelnummer 395-6833
Tillv. art.nr155480BSPP
VarumärkeGems Sensors
672,78 kr
Each
Enheter
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-artikelnummer 257-133
VarumärkeRS PRO
450,64 kr
Each
Enheter
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-artikelnummer 511-4772
VarumärkeRS PRO
466,89 kr
Each
Enheter
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-artikelnummer 198-0682
Tillv. art.nrFM.26 222 129
VarumärkeParker UCC
3 623,11 kr
Each
Enheter
Liquid Variable Area 2 L/min 20 L/min - 1/2 in 1/2 BSP - Brass - - - +90°C -
RS-artikelnummer 725-9965
Tillv. art.nrUF25B100
VarumärkeCynergy3
2 377,77 kr
Each
Enheter
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 -
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