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. 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. 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. 446-8286
Fabrikantnummer173936-C
FabrikantGems Sensors
93,50 €
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. 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. 446-8309
Fabrikantnummer173939-C
FabrikantGems Sensors
93,50 €
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. 446-8292
Fabrikantnummer173037-C
FabrikantGems Sensors
93,50 €
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. 907-3997
Fabrikantnummer173138
FabrikantGems Sensors
225,15 €
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. 907-3965
Fabrikantnummer155480
FabrikantGems Sensors
66,94 €
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. 395-6827
Fabrikantnummer155420BSPP
FabrikantGems Sensors
69,80 €
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. 907-3969
Fabrikantnummer155481
FabrikantGems Sensors
133,86 €
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. 907-3984
Fabrikantnummer156261
FabrikantGems Sensors
249,48 €
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
126,00 €
Each
Aantal stuks
Liquid RotorFlow Electronic 2 L/min 20 L/min 4.5 → 24 V dc 1/4 in 1/4 BSP Female 6.9bar Polypropylene -29 °C +82°C -29°C +82°C -
RS-stocknr. 907-3959
Fabrikantnummer155420
FabrikantGems Sensors
66,94 €
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. 616-2693
Fabrikantnummer212460E
FabrikantGems Sensors
75,00 €
Each
Aantal stuks
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-stocknr. 395-6934
Fabrikantnummer156268BSPP
FabrikantGems Sensors
282,00 €
Each
Aantal stuks
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 -
RS-stocknr. 907-4057
Fabrikantnummer212465
FabrikantGems Sensors
133,86 €
Each
Aantal stuks
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 -
RS-stocknr. 446-8315
Fabrikantnummer173940-C
FabrikantGems Sensors
65,53 €
Each
Aantal stuks
Liquid Turbine 2 L/min 30 L/min 5 24 V dc 3/8 in 3/8 BSP 200psi Nylon 12 - - -20°C +100°C -
RS-stocknr. 907-3953
Fabrikantnummer155421
FabrikantGems Sensors
133,86 €
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. 907-3993
Fabrikantnummer165077
FabrikantGems Sensors
395,51 €
Each
Aantal stuks
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)