Flow Switches, Meters & Indicators

Introducing our comprehensive collection of Flow Switches, Meters, & Indicators, meticulously designed to meet diverse industrial and domestic fluid management needs. Our range offers cutting-edge solutions to ensure optimal performance and efficiency, from precise flow measurement to reliable flow switching.

For DIY enthusiasts and domestic applications, our 615 - 622 - DIY Flow Switch provides hassle-free installation on 15mm or 22mm pipes, with user-adjustable settings and robust compression fittings rated up to 8 Bar pressure.

The KELCO F Series Paddle Flow Switch is engineered for industrial applications and offers unparalleled versatility with its modular construction, seal-less magnetic drive, and weatherproof IP67 housing. Choose from various models to suit your needs, including high-pressure options up to 400 Bar.

Honsberg's CM2K and CRG Paddle Flow Switches deliver reliable performance with their brass or stainless steel bodies and micro-switch-rated components for precise flow detection in various pipe sizes.

Are you seeking high-performance flow measurement solutions? Explore our Variable Area Flow Meters from HONSBERG and Chemline, offering exceptional chemical resistance, compact designs, and a wide range of capacities to suit various applications.

For advanced applications, our collection includes innovative solutions like thermal flow sensors, gearwheel volumeters, and screw volumeters, ensuring accurate measurement and control even in challenging environments.

Whether you need simple flow indicators or sophisticated flow transmitters, our collection has you covered. With features like ATEX certification, high-pressure ratings, and temperature resistance, our products are engineered to exceed industry standards and deliver reliable performance in any setting.

Experience unparalleled accuracy, reliability, and versatility with our Flow Switches, Meters & Indicators collection. Choose quality, precision, and efficiency—choose us for all your flow management needs.


  • 0 - 500V 15Amp S.P.D.T switch or;
  • Low Voltage model also available ('RL' model)
  • Polypropylene or 316 Stainless models
  • Switches available with 3/4" & 1" BSP & NPT threads
  • Manual override built in to all 'F-H' models
  • Modular construction
  • High pressure 400 Bar 5800 psi models available
  • Seal-less magnetic drive
  • Weatherproof IP67 housing
  • Easily serviceable
  • 4 x paddles supplied with each switch
  • Pipe sizes from 25mm to 200mm
  • 1”BSP threaded pipe fitting
  • Brass or stainless steel option
  • 0.9 - 6.7 m3/h H2O switching range
  • C/O Micro-switch Rated 250Vac/5A
  • 4 x paddle supplied with each switch
  • Pipe sizes from 1” to 6” diameter.
  • Standard 1” BSP fitting
  • 0.19 to 39.90 m³/h switching ranges
  • Brass or stainless steel body
  • C/O Micro-switch Rated 250Vac/15A
  • For 25mm pipe sizes
  • Detects low flows from 0.1 l/min
  • 1”BSP connections
  • Pressure up to 100 bar
  • Max Flow 100 l/min
  • Reed switch or relay option
  • Nominal pipe sizes 10-50 mm
  • 3.5 - 69 l/min switching range
  • 3/8” - 2” BSP threaded connections
  • Low pressure loss
  • Brass or stainless steel option
  • C/O reed switch rated at 230Vac/1A
  • 8mm pipe size
  • 0.04 - 3 l/min switching range
  • 1/4” threaded connections
  • Pressure up to 350 bar
  • Brass or stainless steel option
  • -20..+100 °C optionally 160 °C
  • Nominal pipe sizes 10-50 mm
  • 1.3 - 35 l/min switching range
  • 3/8” - 2” BSP threaded connections
  • Low pressure loss
  • Brass stainless steel or plastic option
  • ATEX option available
  • Process connection: female thread 1/8 "NPT
  • Metering range: 0.005..25 l/min
  • Pressure resistance: PN 6 bar
  • Media: water, gases
  • Weight: 0.13 kg
  • 0 to 500V AC 15 Amp S.P.D.T switch
  • 316 Stainless Process Connection
  • Super Tough Billet Aluminium Housing
  • Manual override built in
  • 3/4” & 1” models available with BSP or NPT threads
  • 400 Bar (5800 psi) pressure rating
  • Seal-less magnetic drive
  • Dieselene & High Temperature versions available
  • Weatherproof IP67 housing
  • Easily serviceable
  • For 15mm to 25mm pipe sizes
  • Detects flows from 2.5 l/min
  • 1” BSP Threaded and PVC push fit
  • Pressure up to 18 bar
  • No metal wetted parts
  • 100 l/min max flow
  • Nominal pipe sizes 8-25 mm
  • 0.1 - 80 l/min switching range
  • 1/4” - 1” BSP threaded connections
  • Pressure 200 bar (500 bar option)
  • Brass or stainless steel option
  • Viscosity compensated version(HD2K)
  • Nominal pipe sizes 10-50 mm
  • 4 - 93 l/min switching range 3/8” - 2” BSP threaded connections
  • Low pressure loss
  • Brass or stainless steel option
  • C/O micro switch rated at 250Vac/5A
  • 40 to 200mm nominal width
  • 40 to 1050 l/min switching range
  • -20-+90 °C (-20-+200 °C option VMX)
  • Flange process connection DIN 2527
  • Precise stepless adjustment
  • ATEX option available
  • Nominal width: DN 8.0.25
  • Process connection: female thread G 1/4..G 1
  • Display range: 0.7..60 l/min
  • Pressure loss: up to 0.7 bar
  • Pressure resistance: up to 0.7 bar
  • Pressure resistance: PN 16 bar
  • Nominal pipe sizes up to 80mm
  • 5-174 l/min switching range
  • Brass / Stainless Steel / Plastic Welded 
  • 1/2″ BSP connection
  • Low Pressure Loss
  • ATEX option
  • Momentary value indicator and totalisation
  • Pulse output with adjustable pulse per volume
  • Antivalent outputs
  • Analogue output of the momentary value
  • Simple guided menu via graphics display
  • Metal insert up to 30 l/min.
  • Media temperature up to 300°C
  • Nominal widths DN 15 and DN 20
  • Brass/stainless steel materials
  • Optional installation
  • No wear-parts
  • No additional power supply
  • For 32-50 mm pipe size
  • 2-220 l/min switching range
  • 1 1/4” - 2” threaded connections
  • Brass or stainless steel option
  • Pressure up to 200 bar
  • Viscosity stabilised
  • Suitable for both liquids & gases
  • 3/8″ to 2″ BSP sizes
  • Optional high & low switch points Optional 4 – 20mA transmitter
  • Pressures up to 16 bar
  • PVC or cast iron connections
  • For 15 mm nominal width
  • 0.4-12 l/min switching range
  • 1/2” male threads
  • Integrated filter
  • Plastic wetted parts
  • Up to 10 bar pressure
  • For 15 mm pipe size
  • 1 l/min switching point
  • 1/2” threaded connections
  • Bi-directional flow switching
  • Pressure up to 300 bar
  • Viscosity stabilised
  • Nominal pipe sizes 8-25 mm
  • 0.1 - 80 l/min switching range
  • 1/4” - 1” BSP threaded connections
  • Optionally side or top displays
  • Brass or stainless steel option
  • Viscosity compensated version(HD2F)
  • Nominal pipe sizes 8-25 mm
  • 0.4 - 60 l/min switching range
  • 1/4” - 1” BSP threaded connections
  • Pressure 200 bar (500 bar option)
  • Brass or stainless steel option
  • -20..+120 °C (-20..+150 °C option)
  • Nominal pipe sizes 8-25 mm
  • 1 - 11 l/min switching range
  • 1/4” - 1” BSP threaded connections
  • Not affected by dirt
  • Brass connection material
  • 230Vac/0.5A reed switch
  • Excellent Chemical Resistance
  • No Programming Required
  • Ultra Low Flow Ranges from 50 ml/min (.013 GPM)
  • Compact Lightweight Design
  • Temperature Rating -40 -120°C (-40 -248°F)
  • NPN or PNP Pulse Output, 4-20mA, RS485
  • FC Series: Compact – 5” Single Scale
  • FS Series: Full Size – 7” Dual Scale
  • Tube: Clear PVC, Polyamide (PA), Polysulfone (PSU), or PVDF
  • Float: PVDF
  • Ends: PVC, CPVC, PP, PVDF, Socket, Threaded, Flanged, Butt or ChemFlare™
  • O-rings: EPDM, FPM (Viton®)
  • Capacities: FC: Up to 220 USGPM (50,000 litres per hour)
  • FS: Up to 220 USGPM (50,000 litres per hour)
  • No moving parts internally
  • Internal wiper provides ability to clean the glass without removing the device.
  • Installation location as desired    
  • For heavily soiled or coloured fluids    
  • 360 ° visibility
  • For 8 mm pipe
  • 0.005 - 5l/min display ranges
  • 1/4” BSP threaded connections
  • Maximum temperature 100 °C
  • Switching contact option(VFR)
  • Brass or Stainless Steel
  • All plastic (POM or PVDF) flow indicator
  • Can be installed in any position
  • Low ‘start-up’ benefit due to low friction design
  • 3/8″ and 1″ BSP sizes
  • Maximum pressure 16 bar
  • Maximum temperature 60ºC
  • Easy to fit to existing pipework
  • Sizes from 1/4″ to 2″ BSP
  • Large glass area allow viewing from any direction
  • Maximum pressure 6 bar
  • Maximum temperature 70°C
  • Brass body
  • Integral flow indicator & scale
  • Brass housing
  • Plastic sight glass
  • Ranges from 0.6 to 8 l/min
  • Temperatures up to 100°C max
  • Max pressure 10 bar
  • 3/4″ BSP male/female thread EPDM Seals
  • Rotor on both sides directly behind natural glass
  • Installation location as desired
  • Mechanical flow indicator
  • With twin rotor for quantitative flow display
  • Medium temperature 100°C
  • High temperature resistance
  • Double-sided large-surface window
  • Natural glass
  • Display of flow rate
  • High temperature resistance
  • Double-sided large-surface window
  • Natural glass
  • Visualisation of the flow rate
  • Ball rises in glass dome to indicate flow
  • Stainless steel body
  • Sizes from 1/4" to 1½" BSP
  • Maximum temperature 200°C
  • Maximum pressure 16 bar
  • Suitable for liquids and gases
  • Nominal pipe sizes 8mm to 80 mm
  • 1 - 600 l/min switching ranges
  • 1/4” -3” BSP threaded connections
  • Medium Temperature -20 °C to 120 °C
  • 720 l/min max flow
  • ATEX option available
  • Nominal pipe sizes 15mm to 100 mm
  • 2 - 1600 l/min switching ranges
  • Flanged process connections
  • Medium Temperature -20 °C to 120 °C
  • Up to 8000 l/min max flow
  • ATEX option available
  • For 25mm pipe sizes
  • Detects low flows from 0.23 l/min
  • 1” BSP male to 1” BSP female thread
  • Pressure up to 200 bar
  • Rated from -20 °C to 90 °C
  • 100 l/min max flow
  • Nominal pipe sizes up to 200mm
  • 1.2 - 34 m3/h switching range
  • Transparent cover to view operation
  • 1” BSP thread / flange options
  • Silver or gold contacts options
  • Suitable for media with ferric particles
  • 40 to 100mm nominal width
  • 50 to 1050 l/min measuring range
  • For fluid or gaseous media
  • Large analogue display
  • Simple adjustment using gauge
  • Brass or stainless steel options
  • Nominal pipe sizes 10mm to 80mm
  • 2 - 500 l/min switching ranges
  • Screw Connection with socket
  • Medium Temperature -20 °C to 60 °C
  • 250 l/min max flow
  • No contact switching
  • Signal conditioning – Linearisation – Characteristic adjustment
  • Input for standard signals 0/2..10 V and 0/4..20 mA
  • Measuring range programmable
  • Linearisation and characteristic adjustment programmable via 32 bases
  • Automatic input fault detection
  • Simple and affordable flow transmitter for pipe diameters of DN32 or larger
  • Plastic version    
  • Suitable for retrofitting in existing pipelines with tapping clamps or weld-on nozzles
  • Simple and affordable flow transmitter for pipe diameters of DN32 or larger
  • Stainless steel version
  • Suitable for retrofitting in existing pipelines with tapping clamps or weld-on nozzles
  • Intrinsically safe use of Pt100 sensors
  • Intrinsically safe use of 0(4)…20 mA sensors
  • Intrinsically safe use of 4…20 mA, loop-powerd indicators
  • Measuring range 0..50 Ω up to 100 kΩ
  • Processor technology with 12 Bit AD/DA-converter
  • Teach-in programming for start- and end-value    
  • Increase or decrease output characteristic programmable
  • Operation mode indicated by use of a 2-color LED
  • Flow transmitter for water and other liquids with integrated temperature measurement
  • Fast response timeIntegrated volume meter with preset
  • Measuring method without moving parts, no wear
  • Stainless steel material coming into contact with medium
  • 1 analog output (20 mA / 10 V)
  • 2 versatile configurable switching outputsIO-Link interface
  • High-resolution graphic LCD Parameters programmable with multifunction ring
  • Waterproof all-metal housing (IP67)
  • Mineral glass front, scratch-proof and chemically resistant
  • Flow transmitter with display
  • For pipe diameters of DN32 or larger
  • Plastic version
  • Suitable for retrofitting in existing pipelines with tapping clamps
  • Analog output 4..20 mA or 0..10 V
  • Two programmable switches
  • Selectable units in the display
  • Parameter change via rotating ring
  • Electronics housing with non-scratch, chemically resistant glass
  • Rotatable electronic housing for best reading position
  • Flow transmitter with display
  • For pipe diameters of DN 32 or larger
  • Stainless steel version
  • Suitable for retrofitting in existing pipelines with tapping clamps
  • Analog output 4..20 mA or 0..10 V
  • Two programmable switches
  • Selectable units in the display
  • Parameter change with rotating ring
  • Electronics housing with non-scratch, chemically resistant glass
  • Rotatable electronic housing for best reading position
  • Metal inserts up to 210 l/min.
  • Media temperature up to 200°C
  • Nominal widths DN 32 to DN 80
  • Brass/stainless steel materials
  • Male thread Installation location as desired
  • No need for auxiliary power