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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Description Prix 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
N° de stock RS 907-3993
Référence fabricant165077
MarqueGems Sensors
305,04 €
Each
Unité
Liquid RotorFlow Electronic 1.5 gal/min 20 gal/min 24 V dc 1/2 in 1/2 NPT Female 13.8bar Stainless Steel - +21°C -29°C +100°C 20 mA @ 24 V dc (No Load), 35 mA @ 24 V dc (Load)
N° de stock RS 395-6934
Référence fabricant156268BSPP
MarqueGems Sensors
290,45 €
Each
Unité
Liquid RotorFlow Electronic 15 L/min 75 L/min 24 V dc 1/2 in 1/4 BSP Female 13.8bar Brass -29 °C +100°C -29°C +100°C -
N° de stock RS 448-7467
Référence fabricantMR3A18BVBN
61,07 €
Each
Unité
Gas Variable Area 10 L/min 100 L/min - 1/8 in 1/8 NPT Female 6.9bar Polycarbonate - +65°C - +65°C -
N° de stock RS 198-0698
Référence fabricantFM.26 222 229
MarqueParker
327,85 €
Each
Unité
Liquid Variable Area 5 L/min 46 L/min - 1/2 in 1/2 BSP - Brass - - - +90°C -
N° de stock RS 906-7639
Référence fabricantRMC-106
127,65 €
Each
Unité
Air Variable Area 100 SCFH 1000 SCFH - 1/2 in 1/2 NPT Female 6.9bar Polycarbonate - - - +54°C -
N° de stock RS 901-0258
Référence fabricant198807005
167,67 €
Each
Unité
Liquid Variable Area 20 l/h 200 L/h - - DN25 Socket - Plastic - - - - -
N° de stock RS 740-6449
Référence fabricantSU9000
992,90 €
Each
Unité
Liquid Ultrasonic 0 L/min 200 L/min 19 → 30 V dc - 1-1/4 BSP 16bar Aluminium Alloy -10 °C +80°C -10°C +60°C -
N° de stock RS 906-7765
Référence fabricantVFA-3
39,22 €
Each
Unité
Air Variable Area 0.6 SCFH 5 SCFH - 1/8 in 1/8 NPT Female 10 (Without Valve) bar, 6.9 (With Valve) bar Acrylic Plastic - +38 (Without Valve) °C, +48 (With Valve) °C - - -
N° de stock RS 804-4051
Référence fabricant7ME6520-3MC13-2AA1
MarqueSiemens
936,90 €
Each
Unité
Liquid Electromagnetic 0 m/s 10 m/s - 3 in DN80 16bar Carbon Steel - - -40°C +70°C -
N° de stock RS 907-4057
Référence fabricant212465
MarqueGems Sensors
63,04 €
Each
Unité
Liquid Turbine 0.1 l/min 2.5 L/min 5 → 24 V dc 1/4 in 1/4 NPT Female 24bar Nylon 12 - - -20°C +100°C -
N° de stock RS 907-4035
Référence fabricant180392
MarqueGems Sensors
148,20 €
Each
Unité
Fluid, Liquid RotorFlow 5 gal/min 30 gal/min - 3/4 in 3/4 NPT Female 13.8bar Brass - +21°C -29°C +100°C -
N° de stock RS 395-6849
Référence fabricant142541BSPP
MarqueGems Sensors
121,25 €
Each
Unité
Liquid RotorFlow 2 L/min 20 L/min - 1/4 in 1/4 BSP Female 13.8bar Brass - - -29°C +100°C -
N° de stock RS 286-298
Référence fabricantEF.7731114291
MarqueParker
295,40 €
Each
Unité
Liquid Variable Area 10 L/min 150 L/min 240 V ac 1 in 1 BSP Female 10bar PET - - +5°C +60°C -
Nouveau
N° de stock RS 196-4458
Référence fabricantPF2A721-F03-27N
MarqueSMC
474,94 €
Each
Unité
- Flow Switch 20 L/min 200 L/min 12 → 24 V dc - G 0.75MPa PBT - - 0°C +50°C -
N° de stock RS 361-0278
Référence fabricantFR5A55PI
242,90 €
Each
Unité
Gas Variable Area 400 L/min 4000 L/min - 1 in 1 NPT Female 6.89bar Acrylic - +65°C - +65°C -
N° de stock RS 804-3894
Référence fabricant7MF4433-1FA22-2RB1
MarqueSiemens
1.839,60 €
Each
Unité
Gas, Liquid, Vapour Digital Pressure Transmitter - - 9 → 24 V - 1/4 NPT 1.6bar Aluminium -40 °C +85°C -40°C +85°C -
N° de stock RS 361-0234
Référence fabricantFR5L61PI
242,90 €
Each
Unité
Liquid Variable Area 5 L/min 75 L/min - 1 in 1 NPT Female 6.89bar Acrylic - +65°C - +65°C -
Nouveau
N° de stock RS 201-7957
Référence fabricantHAFUHH0200L4AXT
MarqueHoneywell
105,45 €
Each
Unité
Air, Gas Digital 0 l/min 200 L/min 3 → 10 V dc - - - - - - - - -
N° de stock RS 441-4879
Référence fabricantS.800004
MarqueParker
78,10 €
Each
Unité
Liquid Variable Area 3 L/min 22 L/min - 3/4 in 3/4 BSP 10bar - - - - +60°C -
N° de stock RS 181-0595
Référence fabricantE8PC-YA-A18
MarqueOmron
98,90 €
Each
Unité
- Adapter - - - - R 1/8 Male - SUS304 - - -20°C +80°C -