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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Viewing 221 - 234 of 234 products
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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. 181-0602
Mfr. Part No.E8PC-YS
BrandOmron
SGD46.47
Each
units
- Throttle - - - - M6 x 0.75 - SUS304 - - -20°C +80°C -
New
RS Stock No. 201-7956
Mfr. Part No.HAFUHH0100L4AXT
BrandHoneywell
SGD181.06
Each
units
Air, Gas Digital 0 l/min 100 L/min 3 → 10 V dc - - - - - - - - -
RS Stock No. 914-8495
Mfr. Part No.SPP-N118-1421-1-4-001
BrandSimex
SGD311.11
Each
units
Fluid, Gas Flow Counter - - 85 → 260 V ac - Screw 25kPa ABS, Fibreglass - - 0°C +50°C 4 → 20 mA
New
RS Stock No. 201-2079
Mfr. Part No.SFM3020
BrandSensirion
SGD3,415.19
1 Tray of 20
Tray(s)
- - - - - - - - - - - - - -
New
RS Stock No. 196-4461
Mfr. Part No.PF3W740S-F06-BTN-M
BrandSMC
SGD1,176.85
Each
units
- Flow Switch 5 L/min 40 L/min 12 → 24 V dc - G 1MPa PPS, Stainless Steel 0 °C +90°C 0°C +50°C 50 mA
RS Stock No. 181-0601
Mfr. Part No.E8PC-YA-C14
BrandOmron
SGD150.89
Each
units
- Adapter - - - - NPT 1/2 Male - SUS304 - - -20°C +80°C -
RS Stock No. 123-7147
Mfr. Part No.ASF1400
BrandSensirion
SGD464.65
Each
units
Air, Gas Flow Meter -400 sccm 400 sccm 7 → 18 V dc 5 mm RS-232, SPI 2bar PBT 0 °C +70°C 0°C +70°C 20 mA
RS Stock No. 144-9340
Mfr. Part No.85 04 63
BrandXylem
SGD3,109.67
Each
units
Liquid Flow Meter 0.2 m/s 10 m/s 230 V ac - DN45 - - - - -20°C +60°C -
RS Stock No. 906-9730
Mfr. Part No.RMB-85-SSV
SGD109.57
Each
units
Liquid Variable Area 10 gal/h 100 gal/h - 1/4 in 1/4 NPT Female 6.9bar Polycarbonate - - - +54°C -
RS Stock No. 407-546
Mfr. Part No.AWM2100V
BrandHoneywell
SGD201.23
Each
units
Dry Gas Unamplified -200 sccm 200 cm³/min 15 V dc 0.2 in - 25psi Plastic - - -25°C +85°C -
New
RS Stock No. 201-7955
Mfr. Part No.HAFUHH0020L4AXT
BrandHoneywell
SGD181.04
Each
units
Air, Gas Digital 0 l/min 20 L/min 3 → 10 V dc - - - - - - - - -
RS Stock No. 906-7793
Mfr. Part No.VFA-9
SGD61.38
Each
units
Air Variable Area 20 SCFH 200 SCFH - 1/8 in 1/8 NPT Female 6.9 (With Valve) bar, 10 (Without Valve) bar Acrylic Plastic - +38 (Without Valve) °C, +48 (With Valve) °C - - -
RS Stock No. 181-0611
Mfr. Part No.E8PC-010-E
BrandOmron
SGD872.96
Each
units
Gas, Liquid Flow Sensor -0.1 MPa 1 MPa 10 → 30 V dc G3/4 Male in M12 4 Pole Connector 1MPa Al2O3 ((alumina) Diaphragm Pressure Port), FKM (O-Ring), PBT (Button), PES (Display Unit), PPSU (Head), SUS304L (Chassis), SUS304L (Pressure Port) -20 °C +100°C -20°C +80°C 120 mA
RS Stock No. 901-0264
Mfr. Part No.198801898
SGD573.44
Each
units
Liquid Variable Area 50 l/h 500 L/h - Maximum of 32 mm DN25 Socket - Plastic - - - - -
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