Flow Meters

A flow meter is a device that determines the volume or mass of a gas or liquid. Flow meters are known by various names depending on the business, including flow gauge, flow indicator, liquid metre, flow rate sensor, etc. They all, however, measure flow. Flow meters can measure open channels such as rivers or streams.


What Type of Flow Meter is Best?


No "universal" flow meters can be used in all applications. Each meter type usually has trade-offs; therefore, knowing the relevant specs is essential.

Things you must know:

  • What is the Gas or Liquid being measured?
  • Minimum and maximum flow rates.
  • What are the accuracy requirements?
  • The fluid temperature and viscosity.
  • Fluid compatibility with the construction materials.
  • The maximum pressure at the location.
  • What pressure drop is allowable?
  • Is the meter mounted in a hazardous location where explosive gases may be present?
  • Is the fluid flow continuous or intermittent?
  • What type of output signal or readout do you need?


Maintaining a Flow Meter


Various factors influence flow meter maintenance requirements and life expectancy. The most important component, of course, is matching the appropriate instrument to the specific application. Poorly chosen devices will usually cause problems at an early stage. Flow meters with no moving parts require less maintenance than devices with moving parts. Nonetheless, all flow meters require repair at some point.


PVL Flow Meters


Pressure Vacuum Level Ltd has been selling high-quality flow meters for over 28 years. PVL provides these devices for various industries.

Don't hesitate to contact us if you have any questions about our pressure sensors or other products.


Other Products


PVL customers can rely on us for high-quality products. Flow Meters are only a handful of the products we provide customers across the United Kingdom. We are also a significant supplier of Pressure Switches and Transducers.



  • 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
  • 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
  • Velocity Range: Up to 224 Nm/s
  • Temperature Range: Up to 180°C
  • Pressure Range: Up to 16 bar
  • Size Compatibility: Usable from DN15 to DN80
  • Precision: ±1.5% or ±1% of the measured value, ±0.3% of full scale
  • Protection: IP67 rating
  • 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)
  • Optional Interfaces: Modbus Tcp (Ethernet), Poe, M-bus
  • Pressure Range Up to 40 Bar
  • Temperature Range Up to 80°c
  • Integrated Display to Show the Measured Values
  • Available From ½" to 2''
  • Settings Adjustable via the Keys of the Display
  • Pressure Range Up to 40 Bar
  • Temperature Range From -30 to 80°c
  • Protection Class IP65 Integrated Display to Show the Measured Values
  • Can Be Used From Dn 8 to Dn 80
  • Settings Adjustable via the Keys of the Display
  • Main Counter Reading Can Be Reset via the Display
  • For Velocities Up to 224 Nm/s
  • Pressure Tight Up to 50 Bar

  • Temperature Range Up to 110°c

  • Protection Class Ip65

  • Integrated Display for Showing the Measured Values

  • Easy Installation Under Pressure

  • Settings Can Be Changed via the Display

  • Main Counter Reading Can Be Reset via the Display

  • Suitable for Gas Velocities Up to 224 Nm/s
  • Engineered to provide long-term accurate flow measurement of liquids
  • 360° rotatable vivid LED display showing both Flow Rate & Flow Total and provides a frequency pulse output
  • Long-term accurate flow measurement of liquids
  • 360° rotatable vivid LED display showing Flow Rate and provides a pulse output and a 1 Amp relay
  • Accurate flow measurement for both corrosive and non-corrosive liquids
  • Blind unit equipped with an LED flow indicator and can provide pulse, 4-20mA or voltage outputs
  • Designed for tough industrial applications
  • Accurate flow measurement for both corrosive and non-corrosive liquids
  • 360° rotatable vivid LED display
  • Designed for tough industrial applications
  • Accurate flow measurement for both corrosive and non-corrosive liquids
  • 360° rotatable vivid LED display showing Flow Rate and provides a pulse output and a 1 Amp relay
  • Designed for tough industrial applications
  • Engineered to provide long-term accurate flow measurement of liquids
  • 360° rotatable vivid LED display showing both Flow Rate & Flow Total and provides a 4-20mA output
  • Designed for tough industrial applications
  • Accurate flow measurement for both corrosive and non-corrosive liquids
  • 360° rotatable vivid LED display showing both Flow Rate & Flow Total and provides a
  • 4-20mA output
  • 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
  • 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
  • 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
  • 1/4” or 1/2” Screw in connection
  • 2 - 150 cm/s metering range
  • 4-20 mA or 0-10V output
  • PNP / NPN switch output
  • All stainless wetted parts
  • Fast response times
  • High precision and linearity
  • For oils and other viscous media
  • Ranges from 1.5 to 2500 l/min
  • Connection G 1..G 21 /2
  • Very low dependence on viscosity
  • Can be used up to 40,000 mm²/s (cSt)
  • Linear frequency output (push-pull)
  • Light and compact device (aluminium housing)
  • Operation and measurement possible with forwards and reverse flow
  • For cost-sensitive applications
  • Nominal sizes of 15mm to 50mm
  • 0.2 - 330 l/min flow ranges
  • Aluminium, 316 stainless or UPVC
  • -40 to 100 °C temperature ranges
  • Quadrature pulse output option
  • Ideal for visocus fluids
  • High precision and linearity
  • For oils and other viscous media
  • Ranges from 0.02 to 150 l/min
  • Light and compact construction in an aluminium housing
  • For cost-sensitive applications
  • Optical indication of the flow rate and temperature status
  • 1x current output 4..20 mA and 1x limit PNP output
  • Settings provided by magnetic pen
  • Stainless steel case
  • Particularly suitable for extremely high flow rates
  • Extremely fast response time: 100 ms
  • Measures flow, total consumption, temperature and pressure
  • Measurement at high temperatures – max. 200 °C
  • Measurement in various gases by selecting gas type, on request
  • Can be used in pipes from DN 20 to DN 500
  • Installation via 1/2″ ball valve under pressure
  • RS 485 interface (Modbus-RTU), 4…20 mA, pulse output as standard
  • From 0.4 to 100 l/min flow ranges    
  • Very fast response time    
  • High Overload Protection    
  • High Max Flow    
  • Low pressure  Loss    
  • Compact Design    
  • 150c High Temperature Option    
  • 100 bar High pressure Version Available