• Reed switch rated at 250Vac/50VA
• Sizes from 3/8" to 2" BSP
• 3 to 62 l/min adjustment ranges
• Brass, stainless steel or plastic bodies
• Up to 25 bar system pressure
• Temperatures up to 110°C

• 4 x paddles supplied with each switch
• Suitable for pipe sizes from 25mm to 200mm (1" to 8")
• 1"BSP threaded pipe fitting
• All stainless steel option
• Easily adjusted by screw under sliding cover
• Standard (IP65) Din plug
• C/O microswitch rated 250Vac/5A

• Suitable for pipe sizes from 1" to 6" diameter.
• Standard 1" BSP fitting
• 0.19 to 39.90 m³/h (H²O) adjustment ranges
• 4 x paddle sizes supplied with each switch
• Brass or stainless steel body
• Protected to IP65

• Suitable for pipe sizes from 1" to 7.5"" diameter.
• Standard 1" BSP fitting
• 0.2 to 90.80 m³/h (H²O) adjustment ranges
• 4 x paddle sizes supplied with each switch
• Brass or stainless steel body
• Protected to IP65

• All polypropylene construction with s/steel thread option.
• Suitable for acids, chemicals & seawater
• Standard 1" BSPT thread
• 15A or 20A 500V SPDT switch
• Suits pipe sizes 25mm and above
• 18 or 100 bar pressure rating
• Protected to IP65
• Fully adjustable with manual override.

• Polypropylene body with stainless steel thread
• Standard 1" BSPT thread
• 15A or 20A 500V SPDT switch
• Suits pipe sizes 25mm and above
• 100 bar pressure rating
• Fully adjustable with manual override

• Dry running protection for pumping systems
• Built-in timer
• Automatic run-on timer
• No metal parts in contact with the liquid
• Suitable for acids, chemicals & seawater
• Directly controls pumps up to 3.75kW 5HP
• For pipe sizes 25mm and above
• 18 bar pressure rating

• Integrated flow and pressure control
• Built-in timer and run-on timer
• Directly controls pumps up to 3.75kW 5HPs
• Suitable for acids, chemicals & seawater
• Dry running protection for pumping systems
• Microprocessor digital control

• Corrosion resistant body
• Unique, stainless steel trailing cable sensor
• Adjustable flow sensitivity
• Ideal for open channel or piped systems
• Conveyor belt solids detection
• River management & farm run off systems
• 18 bar pressure rating

• Unique, stainless steel trailing cable sensor
• Standard 1" BSPT fitting
• Corrosion resistant body
• Manual override for testing
• Powerful 15Amp 500Volt SPDT switch
• Suitable for data logging of effluent flow
• Protected to IP67
• 18 bar pressure rating

• Unique, stainless steel trailing cable sensor
• Standard 1" BSPT fitting
• Corrosion resistant body
• Manual override for testing
• Powerful 15Amp 500Volt SPDT switch
• Suitable for data logging of effluent flow
• Protected to IP67
• 100 bar pressure rating

• Detects flows of less than 5ml/min
• Handles flows up to 4l/min
• All wetted parts are UPVC with Viton® O-ring seals
• Suitable for plastic tubing with 6, 8 & 12mm adaptors
• Suitable for acids, chemicals & seawater & gases
• Maximum pressure 108 bar
• PVDF model also available

• Suits tubes and pipes 6 to 20mm (1/4 to 3/4") diameter
• No metal parts are in contact with the liquids
• Suitable for acids, chemicals & seawater
• Choice of three switching flow rates
• 18 bar pressure rating
• Reed switch or solid state switching options
• Liquids, gases, water treatment or chemical dosing uses

• No metal parts are in contact with the liquids
• Suitable for acids, chemicals & seawater
• Suits tubes and pipes 15 to 25mm (1/2" to 1") diameter
• 100l/min flow rating
• Detects very low flows
• Directly switches pump motors up to 1.5kW 2HP
• Versatile all position mounting
• Manual override built in

• Hostaform body
• 1/2" BSP male threads
• Switch-point ranges 0.4 - 12l/min (adjusted at factory)
• Integral built-in filter
• Maximum pressure 10 bar at 20degC
• N/O reed switch rated 250Vac/10VA max

• All plastic (POM)construction (see brass model below)
• Ideal for water, oil or air
• 1/4"; 3/8; 1/2; 3/4 & 1" BSP female threads
• Maximum pressure 10bar
• Adjustable setting range 1 - 11l/min
• N/O reed switch rated 250Vac/50VA max

• Brass body
• Ideal for water, oil or air
• 1/4"; 3/8; 1/2; 3/4 & 1" BSP female threads
• Maximum pressure 100bar
• Adjustable setting range 1 - 11l/min
• N/O reed switch rated 250Vac/50VA ma

• N/O reed switch rated at 220V/100VA
• 1/4" BSP standard thread
• 5 ml/min to 3 l/min switch adjustment ranges
• Brass or stainless steel body
• 300 bar maximum system pressure
• Horizontal or vertical mounting
• See more flow switches for low flow rates.

• C/O reed switch rated at 250V/50VA
• Sizes from 1/4" to 1" BSP
• 0.4 l/min to 60 l/min adjustment ranges
• Brass or stainless steel body
• 200 bar maximum system pressure
• 1; 2 ; 3 or 4 independant switch head option

• C/O reed switch rated at 250V/50VA
• Sizes from 1/4" to 1" BSP
• 0.4 ml/min to 60 l/min adjustment ranges
• Brass or stainless steel body
• 200 bar maximum system pressure
• Horizontal or vertical mounting
• 2.5 meters of PVC cable

• Wider settings eg 1.5 to 15 l/min
• Wider indication range
• Very effective viscosity compensation 30 - 300mm²/s
• New optional displays available - see our What's New page

• C/O reed switch rated at 220V/50VA
• Horizontal or vertical meter option
• Rack & pinion switch setting
• Brass or stainless steel body
• 200 or 500 bar system pressure options
• Sizes from 1/4" to 3" BSP
• ATEX Certified switch-head option - Datasheet 92.1.A-H

• Only 30mm x 15mm
• M5 threaded ports - brass bodyr
• Adjustment range 1 - 100l/min Air (1bar, 20°C)
• N/O reed switch rated at 125Vac/0.5A (10VA)
• For gaseous media only
• More switches for low flow rates

• Only 63mm x 20mm
• M10x1 threaded ports - brass body
• Range: 0.05 to 1.0 l/min H²/O
• Adjustable switch housing
• N/O reed switch rated at 120 Vac/0.5A, 10 VA
• See more switches for low flow rates

• We supply low-cost flow switches suitable for OEM high volume applications.
• Braze or screw-in using adapters supplied
• Suitable for pipes up to 80mm dia
• Please call us to discuss your requirements
• ATEX Certified switch-head option - See Datasheet 92.1.A-U1

• 3/8" to 2" BSP thread sizes
• Brass or stainless steel body
• Maximum liquid temperature - 110°C
• User adjustable reed-switch
• ATEX Certified switch-head option - See Datasheet 92.1.A-U1

• Adjusted to switch between 0.015 and 0.4 l/min H2O
• Sizes from 1/4" to 1/2" BSP
• Low pressure loss design
• Bronze body
• Reed switch rated at 250Vac/1A 50VA
• Can be used with liquids and gases
• More switches for low flow rates

• This flow switch does not rely on any magnets and is therefor ideal for flow switching application where the liquid is contaminated by ferrous (iron) particles - for example:- Cooling water on grinding machines.
• Inductive proximity switch: 10 - 30Vdc/200mA max
• Sizes from 1/4" to 3" BSP
• Bronze or stainless steel body options

• Small, simple flow switch for liquids up to 200 bar
• Bronze body with 1/4", 3/8" or 1/2" BSP ports
• Maximum temperature 90degC
• C/O microswitch rated 250Vac/6A
• Reed switch (Model FF) rated at 250Vac 32VA

• PVC body sizes suitable for 15mm to 80mm PVC pipes
• Screwed fitting (illustrated) flanges or solvent weld options
• PTFE coated stainless steel (1.430) spring
• PVC piston and PVC encapsulated magnet
• Maximum pressure & temperature = 10bar and 60degC
• Ranges from 2 - 500 l/min
• C/O reed switch rated at 250Vac/1.5A (50VA)

• C/O reed switch rated at 250Vac/50VA
• Sizes from 1/4" to 3" BSP
• Up to 300mm DIN flange option
• 1 to 600 l/min adjustment ranges
• Bronze or stainless steel body
• Protected to IP65
• ATEX 11 2G EEx d 11C T6 option - See Datasheet 92.1.A-V1

• C/O microswitch rated at 250Vac/50VA
• Sizes from 1/4" to 3" BSP
• Up to 300mm DIN flange option
• 1 to 600 l/min adjustment ranges
• Bronze or stainless steel body
• Protected to IP65
• ATEX 11 2G EEx d 11C T6 option - See Datasheet 92.1.A-V3

• Flange sizes from DN15 to DN300
• Bronze; Cast Iron or Stainless Steel body options
• Flow rates from 2 - 1,600 l/min (water)
• Suitable for liquids and gases
• Maximum pressures up to 40 bar (stainless steel)
• C/O reed switch rated at 250Vac 80VA max
• Optional microswitch model VM.RF

• Sizes from 1/4" to 3" BSP
• 2 - 600 l/min adjustment ranges (H°O)
• Maximum temperature of 120degC
• Models available for up to 100 bar maximum pressure
• Switch rated at 250Vac/50VA
• Bronze body
• ATEX Certified switch-head option - See Datasheet 92.1.A-V1

• Suitable for use with temperatures up to 350degC
• Visual flow indicator option
• Adjustable switch-point
• Up to 40 bar system pressure
• Standard DIN flanges
• Cast steel body
• More switches for high temperatures here

• Flange sizes from DN 40 to DN 200
• Suitable for temperatures up to 90degC
• Change-over microswitch
• ATEX Certified Switch-head Datasheet 92.1.A-V2
• Brass or stainless steel body
• User adjustable switch-point
• (Multiply water flow-rates by 15 to obtain flow-rates for air)

• Visual flow meter (VA principle)
• Adjustable switch-point
• Stainless steel or aluminium body
• 1/2" & 1" BSP sizes
• Up to 16bar and 100°C
• Proportional linear flow
• Manifold option for up to 8 x instruments

• 1/4", 3/8",1/2", 3/4" and 1"BSP sizes
• 100 bar maximum pressure
• Viscosity compensated option (Model NJV)
• Optional switch-head with LED indicator
• Brass or stainless steel body
• Manifold option for up to 8 x instruments

• Suites pipe sizes from 1/2" to 2" BSP
• 2 to 500 l/min flow ranges
• Slave needle sets the switch-point
• Optional red & green LED's indicate switch status
• SPDT microswitch rated at 220V/3A
• See also Model TZ with 4-20mA output + switch
• Protected to IP65

• Sizes from 1/2" to 8" BSP or ANSI flange
• Up to 500m³/h maximum flow.
• Metal, PVL or PP body
• Up to 200degC with cooling fins
• +/- 10% accuracy (full scale)
• EExd 11C T6 and pneumatic switch option

• New flow sensor operates on the calorimetric principle
• 4 - 20mA output with 2 x user adjustable switch-points
• All stainless steel with no moving parts
• Very fast response times for air, oil or water
• Clear & easy to read back-lit LCD display
• Simple to adjust with removable setting ring
• For more information on the Omni System - Click here

• Stainless steel probe - 1/4 or 1/2" BSP
• No moving parts
• Ideal for air, oil & water monitoring
• LED's show flow trend
• Heavy duty housing option
• Optional integral temperature switch & swan-neck

• Stainless steel probe - 1/4 or 1/2" BSP
• No moving parts
• 6Ideal for air, oil & water monitoring
• LED's show flow trend
• Heavy duty housing option
• Optional integral temperature switch

This stainless steel housing which had been specifically designed to house the Smart display heads for use in hostile conditions, is now available for the Type EFK range of flow sensors.

The picture shows the removable bezel which retains the 8mm thick lens.

• All stainless steel (1.4571) wetted parts
• 1/4" or 1/2"BSP thread
• 28mm or 45mm sensor length
• M12x1 connector plug & 2m cable supplied
• Suitable for Oil, Air & Water
• Maximum pressure 100 bar & 0 - 70degC temp range
• Used with EEFK & EEFKT Din rail control units

• All stainless steel (1.4571) wetted parts
• Hygienic Tri-clover (Tri-clamp) fitting
• M12x1 connector plug & 2m cable supplied
• Ideal for the food & pharmaceutical industries
• Maximum pressure 100 bar
• Operating temperature 0 - 70degC
• Used with EEFK & EEFKT Din rail control units

• Models available for 230Vac and 24Vdc
• Standard Din rail mounting
• 9 x green LED's shows flow trend
• Red LED indicates switch-point
• Relay output plus PNP, NPN
• Easy adjustment for flow & optional temperature switch

PVL now has Britain's largest range of flow switches, manufactured by Honsberg of Germany. Honsberg is a long-established family-owned company in Remscheid which designs and manufactures the finest quality flow, pressure and level switches, plus many other products, in one of Europe's fastest growing businesses in this market. PVL has been a UK distributor for the full Honsberg range for many years and works closely with the Honsberg design team to meet customers' needs.

On this page you can see Honsberg piston, paddle and inductive-signal flow switches for just about every application, including high-pressure flow switches, flow switches for extremely low flow rates, flow switches for ferrous-contaminated water (for example, from water cooled grinding machines), all-plastic switches with no metal wetted parts, flanged flow switches, high-temperature (to 350ºC) flow switches, ATEX-approved flow switches for hazardous areas, even a range of flow switches with dials for fast and easy readout. Add to all the flow switches ranges of Honsberg flow indicators and flow transmitters and you have everything you could need to monitor, log and record flow accurately and reliably in almost any circumstances.

If you need Technical Advice, our Engineers are waiting for your call on 01892 664499 or click here to send a us your enquiry

This page has lots and lots of flow switches and the choice is so vast that quite possibly you will have difficulties in making the best selection for your application - but help is at hand...

We have a team of experienced engineers (Dave, Tony & Jamie) who are sitting at their desks, twiddling their thumbs waiting for the phone to ring. To stir them into action, just click this button once, their phones will ring and they will fall over themselves to offer you the best possible advice and prices!

                                                                           
Go on..... try it now. Our advice is FREE and you won't even have to pay for the call*

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