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 804-3998
Tillv. art.nr7ME6340-3TC13-2AA1
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17 700,00 kr
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Liquid Electromagnetic 0 m/s 10 m/s - 0.5 → 12 in 1/2 NPT 40bar Carbon Steel - - -40°C +100°C -
RS-artikelnummer 804-3901
Tillv. art.nr7MF4433-1HA22-2RB1
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15 769,74 kr
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Gas, Liquid, Vapour Digital Pressure Transmitter - - 9 → 24 V - 1/4 NPT 30bar Aluminium -40 °C +85°C -40°C +85°C -
RS-artikelnummer 804-3894
Tillv. art.nr7MF4433-1FA22-2RB1
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16 028,00 kr
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Gas, Liquid, Vapour Digital Pressure Transmitter - - 9 → 24 V - 1/4 NPT 1.6bar Aluminium -40 °C +85°C -40°C +85°C -
RS-artikelnummer 804-3913
Tillv. art.nr7MF4433-1CA22-2RB1
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16 672,00 kr
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Gas, Liquid, Vapour Digital Pressure Transmitter - - 9 → 24 V - 1/4 NPT 0.06bar Aluminium -40 °C +85°C -40°C +85°C -
RS-artikelnummer 804-3904
Tillv. art.nr7MF4433-1BA22-2RB1
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17 510,00 kr
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Gas, Liquid, Vapour Digital Pressure Transmitter - - 9 → 24 V - 1/4 NPT 0.02bar Aluminium -40 °C +85°C -40°C +85°C -
RS-artikelnummer 804-3917
Tillv. art.nr7MF4433-1EA22-2RB1
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15 810,00 kr
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Gas, Liquid, Vapour Digital Pressure Transmitter - - 9 → 24 V - 1/4 NPT 0.6bar Aluminium -40 °C +85°C -40°C +85°C -
RS-artikelnummer 804-4036
Tillv. art.nr7ME6520-4HC13-2AA1
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12 498,01 kr
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Liquid Electromagnetic 0 m/s 10 m/s - 6 in 1/2 NPT 16bar Carbon Steel - - -40°C +70°C -
RS-artikelnummer 804-4051
Tillv. art.nr7ME6520-3MC13-2AA1
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8 973,89 kr
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Liquid Electromagnetic 0 m/s 10 m/s - 3 in DN80 16bar Carbon Steel - - -40°C +70°C -
RS-artikelnummer 804-3910
Tillv. art.nr7MF4433-1GA22-2RB1
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15 769,74 kr
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Gas, Liquid, Vapour Digital Pressure Transmitter - - 9 → 24 V - 1/4 NPT 5bar Aluminium -40 °C +85°C -40°C +85°C -
RS-artikelnummer 804-3926
Tillv. art.nr7MF4997-1BE
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1 129,68 kr
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- Cover with Window - - - - - - Die-Cast Aluminium - - - - -
RS-artikelnummer 804-3907
Tillv. art.nr7MF4433-1DA22-2RB1
VarumärkeSiemens
15 810,00 kr
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Gas, Liquid, Vapour Digital Pressure Transmitter - - 9 → 24 V - 1/4 NPT 0.25bar Aluminium -40 °C +85°C -40°C +85°C -