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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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庫存編號 510-0644
BrandRS PRO
HK$2,661.94
單位
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庫存編號 510-0622
BrandRS PRO
HK$2,351.93
單位
Gas, Liquid Piston Inline 1 L/min 5 L/min 200 V ac 8 mm 1/4 BSP Female 16bar Aluminium - +100°C - +120°C 1 A
RS庫存編號 257-149
BrandRS PRO
HK$378.26
單位
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庫存編號 511-4772
BrandRS PRO
HK$416.03
單位
Liquid Beverage 0.6 L/min 10 L/min 4.5 → 24 V dc 43315 in 3/8 Push On 10bar PVDF - - 0°C +125°C 10 mA
RS庫存編號 510-0616
BrandRS PRO
HK$2,351.93
單位
Gas, Liquid Piston Inline 0.5 L/min 3 L/min - 8 mm 1/4 BSP Female 16bar Aluminium - +100°C - +120°C -
RS庫存編號 510-0571
BrandRS PRO
HK$1,969.09
單位
Liquid Piston Inline 0.5 L/min 3 L/min 200 V ac 1/4 in 1/4 BSP 300bar Brass - +100°C - +120°C 1 A
RS庫存編號 613-4238
BrandRS PRO
HK$1,590.97
單位
Gas, Liquid Paddle 5.5 L/min 7 L/min 250 V ac 15 mm 1/2 BSP Female 25bar Nickel Plated Brass - +110°C - +110°C 5 A
RS庫存編號 508-2704
BrandRS PRO
HK$1,184.40
單位
- - - 0.05 → 10 L/min 4.5 → 24 V dc 8 mm - - - - - -25°C +125°C 8 mA
RS庫存編號 510-0565
BrandRS PRO
HK$1,969.09
單位
Liquid Piston Inline 0.1 L/min 0.6 L/min 200 V ac 1/4 in 1/4 BSP 300bar Brass - +100°C - +120°C 1 A
RS庫存編號 613-4244
BrandRS PRO
HK$1,819.22
單位
Gas, Liquid Paddle 14 L/min 18 L/min 250 V ac 25 mm 1 BSP Female 25bar Nickel Plated Brass - +110°C - +110°C 5 A
RS庫存編號 510-0600
BrandRS PRO
HK$2,363.11
單位
Gas, Liquid Piston Inline 0.1 L/min 0.6 L/min 200 V ac 8 mm 1/4 BSP Female 16bar Aluminium - +100°C - +120°C 1 A
RS庫存編號 511-3915
BrandRS PRO
HK$2,655.93
單位
- - - 6 → 100 L/min 4.5 → 24 V dc 3/4 in - - - - - -25°C +125°C 10 mA
RS庫存編號 257-133
BrandRS PRO
HK$378.26
單位
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庫存編號 511-3909
BrandRS PRO
HK$2,655.93
單位
- - - 2.5 → 30.0 L/min 4.5 → 24 V dc 1/2 in - - - - - -25°C +125°C 10 mA
RS庫存編號 447-4427
BrandRS PRO
HK$3,502.44
單位
Liquid Oval Gear 0.01 L/min 1 L/min 5 → 24 V dc 1/4 in 1/4 BSP 50bar Stainless Steel - - - - -
RS庫存編號 613-4216
BrandRS PRO
HK$1,514.85
單位
Gas, Liquid Paddle 4 L/min 5.5 L/min 250 V ac 10 mm 3/8 BSP Female 25bar Nickel Plated Brass - +110°C - +110°C 5 A
RS庫存編號 510-0559
BrandRS PRO
HK$1,969.09
單位
Liquid Piston Inline 0.04 L/min 0.13 L/min 200 V ac 1/4 in 1/4 BSP 300bar Brass - +100°C - +120°C 1 A
RS庫存編號 447-4449
BrandRS PRO
HK$3,234.13
單位
Liquid Oval Gear 0.01 L/min 4 L/min 5 → 24 V dc 1/4 in 1/4 BSP 50bar Stainless Steel - - - - -
RS庫存編號 613-4222
BrandRS PRO
HK$1,605.58
單位
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庫存編號 511-3971
BrandRS PRO
HK$4,154.99
單位
Liquid Turbine 0.5 L/min 15 L/min 4.5 → 24 V dc 1/2 in 1/2 BSP 10bar Stainless Steel - - -25°C +125°C -