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 Stock No. 407-574
Mfr. Part No.AWM3100V
BrandHoneywell
TWD3,940.00
Each
units
Dry Gas Amplified -200 sccm 200 cm³/min 15 V dc 0.2 in - 25psi Plastic - - -25°C +85°C -
RS Stock No. 407-596
Mfr. Part No.AWM3300V
BrandHoneywell
TWD5,487.00
Each
units
Dry Gas Amplified -1000 sccm 1000 cm³/min 15 V dc 0.2 in - 25psi Plastic - - -25°C +85°C -
RS Stock No. 395-213
Mfr. Part No.AWM5104VN
BrandHoneywell
TWD6,910.00
Each
units
Dry Gas Amplified 0 sLpm 20 SLPM 15 V dc - 1/4 NPT 50psi Plastic - - 0°C +50°C -
RS Stock No. 623-7933
Mfr. Part No.AWM720P1
BrandHoneywell
TWD7,177.00
Each
units
Dry Gas Compensated/Amplified - 200 SLPM 15 V dc 22 mm 4-Pin 25psi Plastic - - -25°C +85°C -
RS Stock No. 201-7953
Mfr. Part No.HAFBLF0200CAAX3
BrandHoneywell
TWD3,850.00
Each
units
Air, Gas Analog 1 l/min 10 L/min 3.3 V dc - - - - - - - - -
RS Stock No. 623-7927
Mfr. Part No.AWM43300V
BrandHoneywell
TWD3,940.00
Each
units
Dry Gas Amplified - 1000 cm³/s 15 V dc 0.246 in - 150psi Plastic - - -25°C +85°C -
RS Stock No. 201-7960
Mfr. Part No.HAFUHM0200L4AXT
BrandHoneywell
TWD5,318.00
Each
units
Air, Gas Digital 0 l/min 200 L/min 3 → 10 V dc - - - - - - - - -
RS Stock No. 407-568
Mfr. Part No.AWM2300V
BrandHoneywell
TWD3,687.00
Each
units
Dry Gas Unamplified -1000 sccm 1000 cm³/min 15 V dc 0.2 in - 25psi Plastic - - -25°C +85°C -
RS Stock No. 201-7955
Mfr. Part No.HAFUHH0020L4AXT
BrandHoneywell
TWD5,076.00
Each
units
Air, Gas Digital 0 l/min 20 L/min 3 → 10 V dc - - - - - - - - -
RS Stock No. 201-7956
Mfr. Part No.HAFUHH0100L4AXT
BrandHoneywell
TWD5,319.00
Each
units
Air, Gas Digital 0 l/min 100 L/min 3 → 10 V dc - - - - - - - - -
RS Stock No. 201-7957
Mfr. Part No.HAFUHH0200L4AXT
BrandHoneywell
TWD5,076.00
Each
units
Air, Gas Digital 0 l/min 200 L/min 3 → 10 V dc - - - - - - - - -
RS Stock No. 407-546
Mfr. Part No.AWM2100V
BrandHoneywell
TWD3,687.00
Each
units
Dry Gas Unamplified -200 sccm 200 cm³/min 15 V dc 0.2 in - 25psi Plastic - - -25°C +85°C -
RS Stock No. 201-7954
Mfr. Part No.HAFBLF0200CAAX5
BrandHoneywell
TWD3,812.00
Each
units
Air, Gas Analog 1 l/min 10 L/min 5 V dc - - - - - - - - -
RS Stock No. 201-7961
Mfr. Part No.HAFUHM0300L4AXT
BrandHoneywell
TWD5,850.00
Each
units
Air, Gas Digital 0 l/min 300 L/min 3 → 10 V dc - - - - - - - - -
RS Stock No. 203-6327
Mfr. Part No.AWM92100V
BrandHoneywell
TWD2,514.00
Each
units
Liquid Mass Air Flow -200 cc/m 200 cc/m 8 → 15 V dc - - - - - - - - -
RS Stock No. 201-7952
Mfr. Part No.HAFBLF0200C4AX3
BrandHoneywell
TWD3,850.00
Each
units
Air, Gas Digital 1 l/min 10 L/min 3.3 V dc - - - - - - - - -
RS Stock No. 395-190
Mfr. Part No.AWM5102VN
BrandHoneywell
TWD4,887.00
Each
units
Dry Gas Amplified 0 sLpm 10 SLPM 15 V dc - 1/4 NPT 50psi Plastic - - 0°C +50°C -
RS Stock No. 201-7963
Mfr. Part No.HAFUHT0020L4AXT
BrandHoneywell
TWD6,065.00
Each
units
Air, Gas Digital 0 l/min 20 L/min 3 → 10 V dc - - - - - - - - -
RS Stock No. 201-7951
Mfr. Part No.HAFBLF0200C2AX5
BrandHoneywell
TWD3,255.00
Each
units
Air, Gas Digital 1 l/min 10 L/min 5 V dc - - - - - - - - -
RS Stock No. 201-7958
Mfr. Part No.HAFUHM0010L4AXT
BrandHoneywell
TWD5,719.00
Each
units
Air, Gas Digital 0 l/min 10 L/min 3 → 10 V dc - - - - - - - - -