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 81 - 100 of 279 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
New
RS Stock No. 213-3260
Mfr. Part No.FFUS25-1G1IO
BrandSick
$1,440.78
Each
units
- Flow Meter 5 l/min 240 L/min 18 → 30 V dc 25 mm G1 1/4 Male 10bar PPSU 0 °C +80°C 0°C +60°C 100 mA
RS Stock No. 210-0717
Mfr. Part No.PF20H-11.010.C043.20.1.0000.0
BrandBaumer
$1,135.42
Each
units
Liquid FlexFlow Hygienic Flow & Temperature Measurement Sensor 10 cm/s 400 cm/s 30 V dc - 1 1/2" Tri-Clamp - - - - - - -
RS Stock No. 185-9982
Mfr. Part No.S.900001
BrandParker
$189.36
Each
units
Liquid Variable Area 1 L/min 25 L/min 5 V dc 3/8 in 3/8 BSP 10bar - - - +5°C +50°C -
RS Stock No. 780-0119
Mfr. Part No.LFS-01
BrandCynergy3
$478.62
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 +75°C 1 A
RS Stock No. 744-0717
Mfr. Part No.PFM750S-C8-A-W
BrandSMC
$478.23
Each
units
Dry Air, Gas Integrated Display 1 L/min 50 L/min 24 V dc 8 mm One-Touch Fitting 750kPa PBT 0 °C +50°C 0°C +50°C -
RS Stock No. 613-4222
BrandRS PRO
$350.90
Each
units
Gas, Liquid Paddle 7.5 L/min 10 L/min 250 V ac 20 mm 3/4 BSP Female 25bar Nickel Plated Brass - +110°C - +110°C 5 A
RS Stock No. 804-3998
Mfr. Part No.7ME6340-3TC13-2AA1
BrandSiemens
$4,268.57
Each
units
Liquid Electromagnetic 0 m/s 10 m/s - 0.5 → 12 in 1/2 NPT 40bar Carbon Steel - - -40°C +100°C -
RS Stock No. 201-2075
Mfr. Part No.SFM3019
BrandSensirion
$274.11
Each
units
- - - - - - - - - - - - - -
RS Stock No. 144-9339
Mfr. Part No.85 04 73
BrandXylem
$3,528.38
Each
units
Liquid Flow Meter 0.2 m/s 10 m/s 230 V ac - DN25 - - - - -20°C +60°C -
New
RS Stock No. 218-9954
Mfr. Part No.HAFBLF0100C4AX5
BrandHoneywell
$210.97
Each
units
Air Bidirectional Flow 0 l/min 0.1 L/min 5 V - - - - - - - - -
RS Stock No. 122-8441
Mfr. Part No.51582
$486.40
Each
units
Liquid Piston - 0.1 gal/min - 1/4 in 1/4 NPT Female 69bar Brass - - -29°C +148.9°C -
RS Stock No. 205-7751
Mfr. Part No.SLF3S-0600F
BrandSensirion
$200.06
Each
units
Fluid Liquid Flow Sensor -2000 μl/min 2000 μl/min 3.5 V dc - - - - - - - - -
RS Stock No. 256-281
Mfr. Part No.S.800001
BrandParker
$243.71
Each
units
Liquid Variable Area 0.2 L/min 2 L/min - 3/4 in 3/4 BSP 10bar - - - - +60°C -
RS Stock No. 395-7016
Mfr. Part No.166703-A
$75.14
Each
units
Gas Piston - 158 L/min 120 → 240 V ac/dc 1/4 in 1/4 BSP 10bar Noryl - +100°C - +100°C -
RS Stock No. 780-0122
Mfr. Part No.LFS-03
BrandCynergy3
$468.05
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. 395-7224
Mfr. Part No.020-3499
$765.94
Each
units
Liquid Paddle 15 L/min 125 L/min 250 V 1 in 1 BSP 55bar Stainless Steel - - -18°C +100°C -
RS Stock No. 361-0161
Mfr. Part No.2530A4A72BVBN
$416.36
Each
units
Gas Variable Area 14 L/min 140 L/min - 1/4 in 1/4 NPT Female 6.89bar Acrylic - +65°C - +65°C -
RS Stock No. 181-0651
Mfr. Part No.E8FC-25T
BrandOmron
$1,266.34
Each
units
Liquid Flow Sensor 0.6 (Nominal Diameter B 3/8 in) L/min, 1 (Nominal Diameter B 1/2 in) L/min, 1.5 (Nominal Diameter B 3/4 in) L/min, 2 (Nominal Diameter B 1 in) L/min 14 (Nominal Diameter B 3/8 in) L/min, 30 (Nominal Diameter B 1/2 in) L/min, 60 (Nominal Diameter B 3/4 in) L/min, 100 (Nominal Diameter B 1 in) L/min 15 → 30 V dc 9.525 mm, 12.7 mm, 19.05 mm, 25.4 mm M12 4 Pole Connector 10MPa Chassis), FKM (O-Ring), PBT (Button), PES (Display Unit), PPSU (Head), SUS304 (Nut), SUS304L (Detecting Unit 0 °C +85°C -20°C +80°C 192 mA
RS Stock No. 200-9556
Mfr. Part No.LS32-1500 Liquid Flow Meter
BrandSensirion
$995.45
Each
units
Liquid Liquid Flow Meter 0.01 l/min 0.04 L/min 5 V - - - - - - - - -
RS Stock No. 205-1292
Mfr. Part No.14270749
BrandWIKA
$813.24
Each
units
Liquid Electronic Flow Switch 5 cm/s 300 cm/s 15 → 35 V - - - - - - - - -