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. 395-6883
Fabrikantnummer156262BSPP
FabrikantGems Sensors
178,20 €
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. 395-6861
Fabrikantnummer155481BSPP
FabrikantGems Sensors
129,80 €
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. 446-8286
Fabrikantnummer173936-C
FabrikantGems Sensors
101,55 €
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. 907-3928
Fabrikantnummer70824
FabrikantGems Sensors
106,80 €
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
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 -
RS-stocknr. 395-9337
Fabrikantnummer142542BSPP
FabrikantGems Sensors
121,20 €
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
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. 395-6877
Fabrikantnummer156261BSPP
FabrikantGems Sensors
178,20 €
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. 907-3997
Fabrikantnummer173138
FabrikantGems Sensors
165,62 €
Each
Aantal stuks
Fluid, Liquid RotorFlow 1.5 gal/min 20 gal/min - 1/2 in 1/2 NPT Female 13.8bar Stainless Steel - +21°C -29°C +100°C -
RS-stocknr. 395-6827
Fabrikantnummer155420BSPP
FabrikantGems Sensors
71,90 €
Each
Aantal stuks
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-stocknr. 907-3965
Fabrikantnummer155480
FabrikantGems Sensors
64,52 €
Each
Aantal stuks
Fluid, Liquid RotorFlow 1.5 gal/min 20 gal/min - 1/2 in 1/2 NPT Female 6.9bar Polypropylene - +21°C -29°C +82°C -
RS-stocknr. 395-6984
Fabrikantnummer166704
FabrikantGems Sensors
44,80 €
Each
Aantal stuks
Liquid Piston - 3.8 L/min 120 → 240 V ac/dc 1/4 in R 1/4" 10bar Noryl - +100°C - +100°C -
RS-stocknr. 907-3969
Fabrikantnummer155481
FabrikantGems Sensors
114,46 €
Each
Aantal stuks
Liquid RotorFlow Electronic 1.5 gal/min 20 gal/min 4.5 → 24 V dc 1/2 in 1/2 NPT Female 6.9bar Ploypropylene - +21°C -29°C +82°C 8 mA
RS-stocknr. 907-3959
Fabrikantnummer155420
FabrikantGems Sensors
64,52 €
Each
Aantal stuks
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-stocknr. 907-3984
Fabrikantnummer156261
FabrikantGems Sensors
154,25 €
Each
Aantal stuks
Liquid RotorFlow Electronic 0.1 gal/min 5 gal/min 4.5 → 24 V dc 1/4 in 1/4 NPT Female 13.8bar Brass - +21°C -29°C +100°C 8 mA
RS-stocknr. 395-6855
Fabrikantnummer155421BSPP
FabrikantGems Sensors
129,80 €
Each
Aantal stuks
Liquid RotorFlow Electronic 2 L/min 20 L/min 4.5 → 24 V dc 1/4 in 1/4 BSP Female 6.9bar Polypropylene -29 °C +82°C -29°C +82°C -
RS-stocknr. 395-6990
Fabrikantnummer166701-A
FabrikantGems Sensors
44,80 €
Each
Aantal stuks
Gas Piston - 28 L/min 120 → 240 V ac/dc 1/4 in 1/4 BSP 10bar Noryl - +100°C - +100°C -
RS-stocknr. 906-8106
Fabrikantnummer135805
FabrikantGems Sensors
183,48 €
Each
Aantal stuks
Fluid, Liquid Shuttle - 0.5 gal/min - 1/2 in 1/2 NPT Female 8.3bar PVC +21 °C +37.8°C - +48.9°C -
RS-stocknr. 907-3953
Fabrikantnummer155421
FabrikantGems Sensors
114,46 €
Each
Aantal stuks
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-stocknr. 395-6833
Fabrikantnummer155480BSPP
FabrikantGems Sensors
71,90 €
Each
Aantal stuks
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 -