Flow Switches

A flow switch are flowmeter devices used to measure the flow rate and pressure of liquid, gas or vapour that passes through them. They measure flow rates over a set time, or they can continually measure the medium passed through. They operate by sending signals to another component elsewhere in the system (e.g. pumps) telling it to stop/start in order to adjust flow rate and pressure to the desired and programmed levels.


Common types of flow switches


  • Water: uses a paddle (physical or ultrasonic), for water pumps and sprinklers.

  • Gas and air: HVAC and ducting, paddle air, boilers, inline air flow switches

  • Thermal dispersion: involves a sensor probe, allows the rate of gas or liquid flow to be calculated according to how quickly heat is carried away by the molecules flowing past.

  • Oil: can operate at higher temperatures with robust seals and housing.

  • Ultrasonic, Magnetic: emits an ultrasonic signal to the medium, this is then bounced back and converted by the primary device. Commonly used in dirty applications such as wastewater

  • Mechanical: need to be tested regularly as continual movements of parts will lead to wear and tear.

  • PVC: basic type ideal where a quick visual confirmation of flow/no flow status is needed. Designed for cleaning and maintenance.

  • Industrial: larger more robust so can withstand higher volumes, pressure and flow rates, designed for heavily contaminated or hazardous materials.

  • Pneumatic: for applications where there is a necessary pressure differential between different areas of ducting.

  • Adjustable: quickly and easily recalibrate the desired flow settings

  • Rotary: functions as a basic turbine, ideal for low flow liquid monitoring.

Some basic rules to install a flow switch:


  • Install on a straight section of pipe or duct

  • Make sure there is a good length of straight pipe in front and behind the switch

  • Avoid fitting or wiring near to bends, other fittings, valves, drains, narrower or wider sections of pipe

Each type of flow switch has its own specific applications and installation constraints. The way to select the right one is to think about the application as a guide, not the technology. 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.


...
Lees meer Lees minder

Filters

1 - 20 van 73 producten worden weergegeven
Resultaten per pagina
Omschrijving Prijs 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-stocknr. 613-4238
FabrikantRS PRO
180,80 €
Each
Aantal stuks
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-stocknr. 510-0571
FabrikantRS PRO
223,76 €
Each
Aantal stuks
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-stocknr. 613-4222
FabrikantRS PRO
182,44 €
Each
Aantal stuks
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-stocknr. 613-4244
FabrikantRS PRO
205,74 €
Each
Aantal stuks
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-stocknr. 510-0565
FabrikantRS PRO
223,76 €
Each
Aantal stuks
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-stocknr. 613-4216
FabrikantRS PRO
172,13 €
Each
Aantal stuks
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-stocknr. 510-0559
FabrikantRS PRO
223,76 €
Each
Aantal stuks
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-stocknr. 780-0289
FabrikantnummerFSVPLC06
FabrikantCynergy3
79,60 €
Each
Aantal stuks
Liquid In-line 0.6 L/min 80 L/min 5 V ac G1 1 BSP Female 8bar Brass - +85°C - +85°C -
RS-stocknr. 907-3928
Fabrikantnummer70824
FabrikantGems Sensors
106,80 €
Each
Aantal stuks
Liquid Piston - 1 gal/min - 1/4 in 1/4 NPT Female 69bar Brass - - -29°C +93.3°C -
RS-stocknr. 744-0913
FabrikantnummerPFM710S-C4-A-W
FabrikantSMC
230,03 €
Each
Aantal stuks
Dry Air, Gas Integrated Display 0.2 L/min 10 L/min 24 V dc 4 mm One-Touch Fitting 750kPa PBT 0 °C +50°C 0°C +50°C -
RS-stocknr. 256-578
66,89 €
Each
Aantal stuks
Liquid Control Valve 3 L/min 6 L/min 240 V ac 22 mm - 10bar - +5 °C +85°C +5°C +70°C -
RS-stocknr. 744-0705
FabrikantnummerPFM725S-C6-A-W
FabrikantSMC
230,03 €
Each
Aantal stuks
Dry Air, Gas Integrated Display 0.5 L/min 25 L/min 24 V dc 6 mm One-Touch Fitting 750kPa PBT 0 °C +50°C 0°C +50°C -
RS-stocknr. 395-6984
Fabrikantnummer166704
FabrikantGems Sensors
44,80 €
Each
Aantal stuks
Liquid Piston - 3.8 L/min 120 → 240 V ac/dc 1/4 in R 1/4" 10bar Noryl - +100°C - +100°C -
RS-stocknr. 744-0701
FabrikantnummerPFM710S-C4-B-W
FabrikantSMC
232,07 €
Each
Aantal stuks
Dry Air, Gas Integrated Display 0.2 L/min 10 L/min 24 V dc 4 mm One-Touch Fitting 750kPa PBT 0 °C +50°C 0°C +50°C -
RS-stocknr. 849-9398
FabrikantnummerPFM711-N02L-A-A
FabrikantSMC
274,16 €
Each
Aantal stuks
Dry Air, Gas Integrated Display 2 L/min 100 L/min 24 V dc 1/4 in NPT 1MPa PBT 0 °C +50°C 0°C +50°C -
RS-stocknr. 395-7195
Fabrikantnummer020-3489
FabrikantGems Sensors
316,20 €
Each
Aantal stuks
Liquid Shuttle 3 L/min 22.5 L/min 250 V 1 in 1 BSP 27bar Bronze - - -20°C +80°C -
RS-stocknr. 906-8327
Fabrikantnummer197082
FabrikantGems Sensors
42,02 €
Each
Aantal stuks
Liquid Piston - 0.5 gal/min - 3/8 in 3/8 NPT 8.6bar Glass Reinforced Polypropylene - +21°C -18°C +100°C -
RS-stocknr. 395-6990
Fabrikantnummer166701-A
FabrikantGems Sensors
44,80 €
Each
Aantal stuks
Gas Piston - 28 L/min 120 → 240 V ac/dc 1/4 in 1/4 BSP 10bar Noryl - +100°C - +100°C -
RS-stocknr. 907-3748
Fabrikantnummer26615
FabrikantGems Sensors
229,03 €
Each
Aantal stuks
Liquid Shuttle 1 gal/min 6 gal/min - 1 in 1 NPT Female 27.6bar Bronze, Stainless Steel - +37.8°C -29°C +93.3°C -
RS-stocknr. 906-8106
Fabrikantnummer135805
FabrikantGems Sensors
183,48 €
Each
Aantal stuks
Fluid, Liquid Shuttle - 0.5 gal/min - 1/2 in 1/2 NPT Female 8.3bar PVC +21 °C +37.8°C - +48.9°C -
Related Products
Provides accurate flow detection in water and oil ...
Description:
Provides accurate flow detection in water and oil with 1% repeatability. Flow settings on the adjustable version can be easily changed without disassembly. A shuttle by-pass vane inside the housing is controlled externally using an ordinary flat-blade screwdriver. These switches ...
Requires a remote signal processor to operate, see ...
Description:
Requires a remote signal processor to operate, see stock no 313-2526 or 313-2532 (Available in most markets)Pressure rating up to 60 bar static; 100 bar dynamicFluid temperature range: –25 to +80°C (100°C for 10 minutes maximum)On delay time: 8s typicalSwitch ...
The Gems Sensors FS-3 series flow switch has ...
Description:
The Gems Sensors FS-3 series flow switch has a maximum liquid flow rate of 0.2L/min. This water flow switch is an ultra-compact switch specially designed for reliable operation in clean post-filtered water. This instrument quality switch, affordably priced for pure ...
These ultra compact switches have been specially designed ...
Description:
These ultra compact switches have been specially designed for reliable operation in clean post-filtered water. FS-3 switches are instrument quality, yet affordably priced for pure water equipment, from UV lamp switching to filter life monitoring. Also suited to some chemical ...