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?

...
Read more Read less

Filters

Viewing 1 - 20 of 324 products
Results per page
Description Price 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 stock no. 257-149
BrandRS PRO
R 768.59
Each
units
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 stock no. 257-133
BrandRS PRO
R 768.95
Each
units
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 stock no. 256-578
R 1,284.00
Each
units
Liquid Control Valve 3 L/min 6 L/min 240 V ac 22 mm - 10bar - +5 °C +85°C +5°C +70°C -
RS stock no. 511-4772
BrandRS PRO
R 839.75
Each
units
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 stock no. 780-0289
Mfr. Part No.FSVPLC06
BrandCynergy3
R 1,579.72
Each
units
Liquid In-line 0.6 L/min 80 L/min 5 V ac G1 1 BSP Female 8bar Brass - +85°C - +85°C -
RS stock no. 186-0055
Mfr. Part No.EF.7731112291
BrandParker UCC
R 12,558.82
Each
units
Liquid Variable Area 4 L/min 50 L/min 240 V ac 1 in 1 BSP Female 10bar PET - - +5°C +60°C -
RS stock no. 446-8286
Mfr. Part No.173936-C
R 1,454.92
Each
units
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 stock no. 508-2704
BrandRS PRO
R 2,423.25
Each
units
- - - 0.05 → 10 L/min 4.5 → 24 V dc 8 mm - - - - - -25°C +125°C 8 mA
RS stock no. 616-2693
Mfr. Part No.212460E
R 1,132.56
Each
units
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 stock no. 446-8315
Mfr. Part No.173940-C
R 1,557.17
Each
units
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 stock no. 185-9926
Mfr. Part No.EF.7731113291
BrandParker UCC
R 10,583.95
Each
units
Liquid Variable Area 5 L/min 100 L/min 240 V ac 1 in 1 BSP Female 10bar PET - - +5°C +60°C -
RS stock no. 510-0644
BrandRS PRO
R 5,527.58
Each
units
Gas, Liquid Piston Inline 5 L/min 30 L/min 250 V ac 15 mm 1/2 BSP Female 50bar Nickel Plated Brass -20 °C +90°C -20°C +70°C 1 A
RS stock no. 256-562
R 1,217.32
Each
units
Liquid Control Valve 3 L/min 6 L/min 240 V ac 15 mm - 8bar - +5 °C +85°C +5°C +70°C -
RS stock no. 740-6433
Mfr. Part No.SM8000
R 15,924.90
Each
units
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 stock no. 780-0122
Mfr. Part No.LFS-03
BrandCynergy3
R 4,440.29
Each
units
- Paddle 15.2 L/min, 19 L/min 60.6 L/min, 83.3 L/min 230 V 1 → 3 in 1 NPT 20bar Aluminium Alloy - - -30°C +150°C 1 A
RS stock no. 395-6827
Mfr. Part No.155420BSPP
R 1,324.32
Each
units
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 stock no. 780-0282
Mfr. Part No.FSVPLC30
BrandCynergy3
R 1,585.48
Each
units
Liquid In-line - 80 L/min 5 V ac G1 1 BSP Female 8bar Brass - +85°C - +85°C -
RS stock no. 446-8292
Mfr. Part No.173037-C
R 1,557.53
Each
units
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 stock no. 780-0273
Mfr. Part No.FSP10A30
BrandCynergy3
R 1,875.60
Each
units
Liquid In-line - 80 L/min 250 V ac G1 1 BSP 8bar Brass/Polyamide - +85°C - +85°C 10 A
RS stock no. 395-6984
Mfr. Part No.166704
R 839.93
Each
units
Liquid Piston - 3.8 L/min 120 → 240 V ac/dc 1/4 in R 1/4" 10bar Noryl - +100°C - +100°C -