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

...
Read more Read less

Filters

Viewing 21 - 40 of 193 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. 395-6833
Mfr. Part No.155480BSPP
$135.56
Each
units
Liquid RotorFlow 15 L/min 75 L/min - 1/2 in 1/2 BSP Female 6.9bar Polypropylene -29 °C +82°C -29°C +82°C -
RS Stock No. 198-2919
Mfr. Part No.MR3A14BVBN
$175.45
Each
units
Gas Variable Area 0.4 L/min 5 L/min - 1/8 in 1/8 NPT Female 6.9bar Polycarbonate - +65°C - +65°C -
RS Stock No. 898-6738
Mfr. Part No.LG01-2000A005
BrandSensirion
$283.65
Each
units
Liquid Liquid Flow Switch 250 (Isopropyl Alcohol) 220 (Water) ml/min, 250 (Isopropyl Alcohol) ml/min 5 → 12 V 9.2 mm 5 Pin PCB Header 3bar Borosilicate Glass (Tube Material), FEP (Sealing), PEEk (Fitting) - - +10°C +50°C 6.8 mA
RS Stock No. 173-2224
Mfr. Part No.LG01-2000A005
BrandSensirion
$240.141
Each (In a Tray of 25)
units
Liquid Liquid Flow Switch 250 (Isopropyl Alcohol) 220 (Water) ml/min, 250 (Isopropyl Alcohol) ml/min 5 → 12 V 9.2 mm 5 Pin PCB Header 3bar Borosilicate Glass (Tube Material), FEP (Sealing), PEEk (Fitting) - - +10°C +50°C 6.8 mA
RS Stock No. 361-0199
Mfr. Part No.FR4L69BVBN
$420.79
Each
units
Liquid Variable Area 0.8 L/min 9 L/min - 1/4 in 1/4 NPT Female 6.89bar Acrylic - +65°C - +65°C -
RS Stock No. 286-260
Mfr. Part No.EF.7731111290
BrandParker
$476.88
Each
units
Liquid Variable Area 2 L/min 30 L/min - 1 in 1 BSP Female 10bar PET - - +5°C +60°C -
RS Stock No. 914-8495
Mfr. Part No.SPP-N118-1421-1-4-001
BrandSimex
$452.14
Each
units
Fluid, Gas Flow Counter - - 85 → 260 V ac - Screw 25kPa ABS, Fibreglass - - 0°C +50°C 4 → 20 mA
RS Stock No. 395-9337
Mfr. Part No.142542BSPP
$221.29
Each
units
Liquid RotorFlow 15 L/min 75 L/min - 1/2 in 1/2 BSP Female 13.8bar Brass -29 °C +100°C -29°C +100°C -
RS Stock No. 198-2903
Mfr. Part No.MR3A13BVBN
$170.33
Each
units
Gas Variable Area 0.1 L/min 1.2 L/min - 1/8 in 1/8 NPT Female 6.9bar Polycarbonate - +65°C - +65°C -
RS Stock No. 198-2981
Mfr. Part No.FR2A13BVBN
$194.88
Each
units
Gas Variable Area 0.1 L/min 1 L/min - 1/8 in 1/8 NPT Female 6.89bar Acrylic - +65°C - +65°C -
RS Stock No. 198-3029
Mfr. Part No.FR2L10BVBN
$179.69
Each
units
Liquid Variable Area 10 ccm 100 cm³/min - 1/8 in 1/8 NPT Female 6.89bar Acrylic - +65°C - +65°C -
RS Stock No. 198-0705
Mfr. Part No.FM.26 322 129
BrandParker UCC
$631.60
Each
units
Liquid Variable Area 5 L/min 55 L/min - 3/4 in 3/4 BSP - Brass - - - +90°C -
RS Stock No. 198-0806
Mfr. Part No.FS.643 322 229
BrandParker UCC
$1,524.50
Each
units
Liquid Boxed Two-Switch 10 L/min 110 L/min 250 V ac 3/4 in - 350bar Stainless Steel - - -20°C +90°C -
RS Stock No. 901-0239
Mfr. Part No.198807008
$366.02
Each
units
Liquid Variable Area 500 l/h 500 L/h - - DN25 Socket - Plastic - - - - -
RS Stock No. 198-3041
Mfr. Part No.GR2-20 LPM AIR
$463.12
Each
units
Gas Variable Area 2 L/min 10 L/min - 1/8 in 1/8 NPT Female 13.7bar Borosilicate Glass - - - +93°C -
RS Stock No. 123-7151
Mfr. Part No.SFM4100 Air
BrandSensirion
$303.11
Each
units
Gas Digital Mass 0 slm 20 slm 3.5 → 9 V 15.35 mm 2-Wire I2C 6 bar, 10 (Over Pressure) bar Aluminium (Coated), Epoxy, Gold, Nickel Plated Brass, Nitrile, Nylon, Oxygenoex, Pa-12, Si, Si3n4, Siox, Stainless Steel, Viton® 0 °C +50°C -20°C +80°C <12.5 mA
RS Stock No. 123-7147
Mfr. Part No.ASF1400
BrandSensirion
$487.01
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. 407-574
Mfr. Part No.AWM3100V
BrandHoneywell
$196.10
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. 901-0236
Mfr. Part No.199335425
$645.10
Each
units
Liquid Variable Area 300 l/h 3000 L/h - - DN40 Socket - Plastic - - - - -
RS Stock No. 901-0065
Mfr. Part No.159001733
$1,588.68
Each
units
- Signet Flow Integral System - - 24 V dc 0.5 → 4 in - - Polypropylene - - - - 4 → 20 mA
Related Products
The Atrato Process ultrasonic flowmeter has been designed ...
Description:
The Atrato Process ultrasonic flowmeter has been designed to operate in challenging process and control environments. The body is manufactured from durable 316 stainless steel and the electrical components are sealed to IP65 rating. Four flow ranges are available from ...
Multi-sensing of “Pressure + temperature” for preventing a ...
Description:
Multi-sensing of “Pressure + temperature” for preventing a sudden stops or manufacturing defects. Various lineup of replacement adapters to enable easy replacement of your current pressure gauges and flow meters. Analog current output function in addition to the IO-Link communications ...
MR3000 molded flow meters supplied with scales in ...
Description:
MR3000 molded flow meters supplied with scales in LPM and SCFH for air, or CCM and GPH for water.Manufactured from high-impact polycarbonate, the MR3000 series can operate at pressures of 100 psig and temperatures of 150°F (65°C).These economically designed units ...
Solid state flow sensor, no moving parts. Displays ...
Description:
Solid state flow sensor, no moving parts. Displays flow and volume. Multi-language, menu driven operation. Simulation option provides all output signals for commissioning. Teach-in, automatic calibration for specific applications. Outputs: 4 to 20mA, calibrated pulse and two relays. Display and ...