We supply a wide variety of (VA) Variable Area Meters also known as Rotameters for air / gas / water applications, with flow rates from as low as  5cc/min up to 10000 lt/min air service. Our meters can be set up for instantaneous rate of flow, flow alarms, flow transmitters, flow-switches, veterinary gas flow meters and specialist medical gas flow meters to name a few. Always discuss your specific application with BES Flowmeters to select the correct meter for your service.
These quality variable area meters are manufactured in the UK to ISO 9001:2008 and calibration are traceable to national standards (UKAS). Successful applications can be found in power generation, gas and oil production, human medical anesthesia, veterinary, aviation, pharmaceutical, water treatment, pollution control, scientific analysis, education, and many other areas.
Our variable area meters utilise a free float design which have a very low-pressure drop while others are available with or without needle control valves for flow rate control. The range includes the long 1200 series flow meters, ideal for use as a calibration master, or where high accuracy with a good resolution scale is required for the most demanding of variable area flow applications. The clearview 7200 series meters available in sizes from 1/2″ to 2″ dia. Great for water or air service.
Our Single and Dual Tube Veterinary Gas Meters are a popular anaesthetic flowmeter with independent flow control valves, photo luminescent backing and earthing tags suitable for trolley or wall mounting. A wide range of flow tubes that conforms to ISO 5358/ BS 4272 are available.
VA Meters are ideal for many industrial, process control, calibration, and analytical applications. An economical latching alarm device is also available, this enables the alarm to remain activated whilst flow is above or below a set point. This reduces expensive electronic circuitry and is ideal for remote and process control applications.
Also suitable for air / gas / water applications is the KIOBOLD range of meters. These VA meters are available in range of types and styles with stainless steel versions suitable for high pressure and high flow applications. Please check out some of our variable area flow meters below that can be utilised for gas service or call B.E.S. Flowmeters for additional technical support on any flow meter you require.
All our VA meters can also be calibrated for Liquid or Gas service. Selection of the correct meter for your application is an important task and we look forward to assisting you in that process.
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Chlorine Gas Flowmeters for Water Treatment
BES Flowmeters can supply an extensive range of flowmeters suitable for dosing dry Chlorine, Sulphur Dioxide and Ammonia gases. These can be incorporated into potable,… -
Clearview 7200 Series Variable Area Flow Meters
The Clearview 7200 Series Rotameters are an Inline Flow Meter designed to offer an economical solution for liquid flow measurements with great flow rate capabilities.… -
Human Anaesthetic Medical Gas Flowmeters
MPB supply an extensive range of human anaesthetic Variable Area Flow Meters suitable for most anaesthesia systems. These can be supplied to ISO 5358 /… -
Kobold VKP Viscosity Compensated Flow Switches
The KOBOLD plastic flow meters model VKP operate on a special suspended float principle with cylindrical measuring tube and spring loaded float with orifice can… -
Panel Mounting Kits
A full range of rear of panel mounting kits are available. Image opposite shows kits for 1200 and 1750 series Variable Area Flow Meters -
Series 1200A Variable Area Flow Meters with Alarm.
The 1200A Series Rotameters are a robust Inline Flow Meter designed to measure the instantaneous flow rate of most process gases and liquids with the… -
Series 1200BV-ANS-230 Anaesthetic Variable Area Flow Meter
This special design flowmeter is set up to house a standard 230mm long anaesthetic flow tube with any standard range. Used extensively in the Veterinary… -
Series 1200HS Hygienic Variable Area Flow Meter
The 1200HS Hygienic Rotameters have has a useful range of flow rates for liquids and are fitted with tri clamp process connections as standard. This… -
Series 1200V Variable Area Flow Meter with Control Valve.
The 1200 Series Rotameters are an Inline Flow Meter of robust design and can be used to measure the flow rate of most process gases… -
Series 1240S Dual Tube Variable Area Flow Meters
The series 1240S are dual tube Rotameters with a meter assembly that gives the user the ability to merge two gases or liquids while reading… -
Series 1241S Dual Tube Cascade Variable Area Flow Meter
The series 1241SÂ is a Dual Tube Cascade Flow Meter and is designed for air or water service and will give the user accurate readings… -
Series 1600/BA Special Veterinary Gas Variable Area Flow Meters
The series 1600/BA are Special Veterinary Gas Rotameters with independent flow control valve and are available with standard Oxygen flow rates up to 15 lt/min.… -
Series 1700 Variable Area Flow Meters
The series 1700 Rotameters are a robust Inline Flow Meter available with a variety of flow ranges up to 10 lt/min water service and 150… -
Series 1750S Variable Area Flow Meters with Control Valve
The Series 1750 Series Rotameters are a robust Inline Flow Meter that can be used to measure the flow rate of most process gases and… -
Series 3000 Variable Area Flow Meter showing Optional Latching Alarm
The Series 3000 Rotameters offers an excellent means of instantaneous flow rate measurement of most process gases and liquids. This Inline Flow Meter is constructed… -
Series 3500 Variable Area Flow Meter
The Series 3500 Rotameters range are a quality flow meter with high accuracy and excellent means of instantaneous flow rate measurement for a range of… -
Series 630 and 1000 Variable Area Flow Meters
The series 630 and 1000 Rotameters are a highly versatile all stainless steel small flowmeter with or without an integral flow control valve.  Flow rates… -
Series 640S & 1040S Dual Tube Flow Meter
The Series 640S is the smallest version dual tube arrangement we offer, ideal where mounting space is of a premium. The 1040S is the larger… -
Series CV100 Flow Control Valve
The CV100 Control Valve can be adapted to any 3/8″ BSPPM and 1/4″ BSPPF connections and are manufactured in PVC or stainless steel. The CV100… -
Series CV200 Flow Control Valve
The CV200 Control Valve can be adapted to any 1/2″ BSPP male and female connections, manufactured in PVC or stainless steel. The CV200 is suitable… -
Series CV300 Flow Control Valve
The CV300 Control Valve can be adapted to any 1″ BSPP male and female connections, manufactured in PVC or stainless steel. The CV300 is suitable… -
Series FA140 and FA280 Variable Area Flow Meter with Alarm
The Series FA140 and FA280 Flowmeters/Alarms were developed to meet the requirement for flowmeters with an integral flow control valve and incorporating a latching alarm… -
Series FA20 Flow Alarm
An in-line flow alarm offering high corrosion resistance and visible flow indication. Typical uses include pump failure, detection of filter blockages and process medium failure… -
Series FA50 Flow Alarm
The FA50 is an in-line, or panel mounted, flow alarm with an adjustable latching alarm device exhibiting excellent corrosion resistance. Widely used in the water… -
Series FA60 Flow Alarm
The FA60 is an in-line, or panel mounted, flow alarm with an adjustable latching alarm device that triggers a reed switch output at a predetermined… -
Series TX175 / TX300 Transmitting Variable Area Flowmeter
The TX175 is a 4-20 mA signal transmitting flowmeter. The TX300 is a similar instrument, with an overall length of 400mm giving a larger scale… -
Series TX50 Transmitting Variable Area Flowmeter
The TX50 is a small in-line or panel mounted flow transmitter developed from our FA50 Flow Alarm but giving a 4-20 mA output signal. See… -
Series TX600 Transmitting Variable Area Flowmeter
The Series TX600 Metal Tube Transmitting Flowmeter has been designed to meet demanding high pressure and corrosive applications where a local display, transmitted out and…