Category: Liquid Flow Meters

Liquid Flow Meters

Liquid Flow Meters are measuring devices used in various applications to measure the flow rate of a liquid. Types include variable area, paddle wheel, turbine, magmeters, ultrasonic, open channel and laminar flow meters.

  • Clamp-on Flow Sensors | MFATGx

    Call for price

    Clamp-on Flow Sensors - Overview

    This externally mounted sensor is for closed pipes and is non-invasive. This means low maintenance and cost-effective flow measurements using ultrasound.

    It can be used for temporary or permanent measurement. It can measure flow in both directions.

    The sensor can be attached by magnet, adhesive or stainless steel strap, and is easy to place. Also available with watertight or protective housing (optional).

    Clamp-on Flow Sensors - Features

    • Magnetic mount for temporary measurement
    • Adhesive for permanent installations
    • Adhesive and weather cover create a seal
    • No gel erosion
    • Easy installation
    • Multi Pipe section – 1 RISONIC Clamp-On Controller can control up to 4 pipes
    • Non-intrusive Ultrasonic flow measurement - No drilling in the pipe and no interruption of operation
    • Cost-efficient
    • Accurate measurement with 1 or 2 measuring paths
    • Bi-Directional flow measurement
    • Accuracy up to 1% of the measured value
    • No configuration software is needed
    • Easy configuration and remote diagnosis
    • IEC 60870-5-104 and Modbus RTU/TCP communication



  • Flow Sensors | MFAT

    Call for price

    Flow Sensors - Overview

    Used in water management, leak detection, and irrigation. These ultrasonic sensors measure the flow velocity of water and calculate the volume and flow information. The average water flow is measured by emitting and receiving ultrasonic signals. The more ultrasonic paths one uses, the higher the system accuracy.

    Type A for filled or partially filled pipes with a 0.75–35 m diameter.

    Type B for open channels & filled or partially filled pipes with a 0.75–35m diameter.

    Type C for filled or partially filled pipes with a 0.20 – 35 m diameter.

    Type K sensors for applications in open channels

    Type G externally mounted clamp-on sensors

    Flow Sensors - Features

    • Wide range of open channel widths of up to 130 meters
    • Wide range of pipe diameters of up to 52 meters
    • Up to 20 paths per measurement section
    • High accuracy of up to 0.5% in the field & 0.2% under ideal conditions
    • High flexibility for configurations such as crossed/non-crossed setups
    • Easy to retrofit into existing, even third-party installations
    • Drift-free and long-term stability
    • No moving parts
  • Flow Switch-Piston Type | FPC04

    Call for price

    Flow Switch-Piston Type - Overview

    This Piston Flow Switch is a mechanical flow switch used for gases or liquids. It boasts a spring-supported piston and has magnetic triggering of a reed switch.

    The rugged design makes for a very durable product.

    Available in plastic or stainless steel.

    Flow Switch-Piston Type - Overview

    • Protection Rating - IP65
    • Pressure resistance 100bar (stainless steel)
    • Minimal pressure loss
    • Good repeatability
    • Dirt-resistant
    • High switch capability
    • Housing: Plastic / Stainless Steel
  • Handheld Ultrasonic Flow Meter Kit | QTFM


    Handheld Ultrasonic Flow Meter Overview

    The Handheld Ultrasonic Flow Meter QTFM realizes non-contact measurement of liquid flow, simply install the sensor on the outer wall of the pipeline to complete the flow measurement. The instrument has characteristics of being small-sized, making it convenient carrying and it gives out an accurate measurement.
    Handheld Ultrasonic Flowmeter Principle Working: The time-transit measurement principle is adopted, the signal transmitted by one flow meter transducer passes through the pipe wall, the medium, and the other side pipe wall, and is received by another flow meter transducer. At the same time, the second transducer also transmits the signal received by the first transducer. With the influence of the medium flow rate, there is a time difference, and then the flow value Q can be obtained.

    Handheld Ultrasonic Flow Meter Applications

    This flow meter is widely used in tap water, heating, water conservancy, metallurgy chemical, machinery,  energy, and other industries. It can be used for production monitoring, flow verification, temporary detection, flow inspection, water meter balance debugging, heating network balance debugging,energy-saving monitoring, and it is a necessary tool and meter for timely flow detection.

    [embed] [/embed]

  • Hot Wire Thermal Flow Switch | FTC05

    Call for price

    Based on the thermodynamic principle, this flow switch features two temperature sensors inside the probe: one is for the medium temperature into which it projects, the other one is heated a few degrees above the medium temperature. When the medium flows, the heat generated in the sensor is diffused by the medium. The difference between these two sensors is used to measure flow rate.

    It comes in all-metal housing and is suitable for a variety of pipe diameters.

    Hot Wire Thermal Flow Switch - Features

    • The flow switch is suitable for oil, water, gas, and liquid level detection
    • Selectable output: PNP/NPN/Relay
    • Metal shell design
    • Easy installation
    • Measuring rod withstands pressure of 10 bar (length can be customized)
    • LED light indicator, simple shape
    • Can set the switch point or range
  • Paddle Wheel Flow Transmitter | FSE

    Call for price

    Paddle Wheel Flow Transmitter - Overview

    Paddlewheel flow transmitters use the flow of the liquid to rotate a paddlewheel (just like a riverboat) in the flow stream. As the fluid moves faster, so does the paddlewheel. Measuring the rotations of the paddlewheel then gives an accurate indication of the speed of the flow.

    Paddle Wheel Flow Transmitter - Features

    • IP68 enclosure, SUS, and chemical resistant body
    • Low power consumption
    • Stable & high-resolution rotor
    • Bi-directional
    • Easy maintenance
    • Easy to use
    • Connect to PLC / IPC directly
  • Portable Ultrasonic Flow Meter | QT621

    Call for price

    Portable Ultrasonic Flow Meter - Overview

    This full-function portable ultrasonic flow meter enables the verification of flow readings of other meters and is great for logging flow system data values over an extended period. The innovative design includes matched precision transducers and signal processing circuitry to accurately measure the flow of most liquids over a wide range of velocities. Clamp-on transducers create no wear, zero pressure loss, and do not require process interruptions to install them since they are attached to the outside of the pipe. The meter is easily transported and installed on different pipes and sites. Its portability makes it an excellent choice for measuring flows throughout the plumbing infrastructure to verify sensor pump and valve performance.

    Portable Ultrasonic Flow Meter - Features

    • Easy to install
    • Reduced installation time and cost
    • No pressure head loss
    • No moving parts to maintain or replace
    • BTU function is an option
    • Could be used as a portable ultrasonic energy meter
    • Powerful data storage
    • Supports the datasheet analysis software
  • Ultrasonic Flow Transmitter | RISONIC COMPACT

    Call for price

    Ultrasonic Flow Transmitter - Overview

    RISONIC Compact uses non-intrusive transducers,  providing the highest precision and reliable measurements as a drift-free flow measurement solution.

    The system measures and determines the path velocities and computes the flow rate and volume in two directions. Costs for installation are low and no operation outage is required.

    Ultrasonic Flow Transmitter - Features

    • No drift
    • No re-calibration
    • No de-watering
    • No pipe-cutting
    • Price/performance ratio
    • Precise, robust flow measurement
    • Quick installation
    • Easy commissioning
    • Pre-set path configurations
    • Web interface and wizard
    • 2 paths and pipes
    • Flexible pipe-materials
    • Latest IT- and Cyber security
    • Integration into plant systems
    • Data logger feature
    • Remote access control/monitoring
    • IoT and Rittmeyer RITUNE® capable
  • Ultrasonic Flow Transmitter | RISONIC Modular

    Call for price

    Ultrasonic Flow Transmitter - Overview

    The RISONIC modular system consists of three components:

    • The Controller : Integrated data logger, limited value monitoring, volume counter, Individually galvanically isolated I/O's, SMS alarm via external GSM / GPRS modem
    • Up to five RISONIC Ultrasonic Transit Time Modules: prepare and process the sensor signals, which then gets sent to the controller
    • Various ultrasonic sensors that are mounted internally or externally, or non-invasively to the outside of the pipe

    This modular measurement system for hydroengineering applications was developed for ultrasonic flow measurements in open channels and filled and partially filled pipes.

    The modular design makes it suitable for a broad spectrum of applications, whether for turbine and pump efficiency measurements, penstock leak detection, or flow measurements in water supplies or irrigation systems.

    The system is user-friendly and intuitive, so it requires minimal training. It can be remotely serviced with a variety of diagnostic functions to pinpoint malfunctions quickly, reducing  downtimes.

    Suitable for use in hydropower plants, water supplies, irrigation systems, and water cooling circuits.

    Ultrasonic Flow Transmitter - Features

    • Excellent long-term stability, no need for recalibration
    • Easy commissioning and signal analysis
    • Wide range of ultrasonic transducers for pipes and channels
    • High measuring accuracy of up to 0.5% of measured value displayed
    • Up to 4 measurement sections per Controller (incl. multi-pipe, multi-channel)
    • Flow measurement in both directions (pump storage power plant)
    • 1 ... 5 ultrasonic modules for a maximum of 20 measurement paths (5 x 4)
    • Modular concept of ultrasonic modules reduces cost for lower path sections
    • Controller with built in web server for easy configuration
    • IEC 60870-5-104 and Modbus RTU/TCP communication
  • Variable Area Flowmeter | 335

    Call for price

    Variable Area Flowmeter 335 Overview

    The Variable Area Flowmeter 335 from GF Piping Systems are radially installed, dismountable meters for measuring the flow rate in industrial piping system constructions. The measuring principle is advanced and efficient. The measurement ranges, which are tailored to our customers‘ needs, and the range of materials available for the tubes and screwed fittings, allow the flow meters to be used for a wide range of applications and a great variety of media.

    If a medium flows upwards through the vertically mounted measuring tube at a sufficient flow velocity, the float is raised to the point at which a state of equilibrium sets in between the lifting force of the medium and the weight of the float. As the mean flow velocity is proportional to the quantity flowing through per unit of time, this state of equilibrium corresponds to the measurement of the current flow volume.

    Variable Area Flowmeter 335 Features

    • Easy and cost-effective measurement principle.
    • No additional energy required for the operation.
    • Easy reading of the measured value.
    • Available scale range from 50 l/h up to 60 000 l/h.
    • Printed double scale for water in percent and l/h.
    • Special scales for liquid and gaseous media can be attached.
    • Wide range of materials.
    • Break-proof and corrosion-resistant.
    • Large dimensions with guiding rod (PVDF-coated).


  • Wall Mount Ultrasonic Flow Meters


    Wall Mount Ultrasonic flow meters - Overview

    Ultrasonic flow meters operate by alternately transmitting and receiving a frequency between two transducers and measuring the time that it takes for sound to travel between the two. The difference in the transit time is directly and accurately related to the velocity of the liquid in the pipe.

    This wall mount type ultrasonic flow meter is designed for use in a closed conduit.

    The transducers are clamp-on types, which in turn makes for easy installation and operation.

    Wall Mount Ultrasonic flow meters - Features

    • Stable and accurate measurement
    • Accuracy: ±1% of reading at rates >0.2 mps
    • High precision
    • One flow meter for all applications
    • Pipe Size: DN15mm-DN6000mm
    • Easy maintenance
    • Highest process safety
    • Repeatability: 0.2%
    • Velocity: ±32m/s


  • Clamp-On Ultrasonic Flow Meter FLO100

    Call for price

    WESS FLO100 Series is the fixed type ultrasonic transit-time flow meter for long-term flow measurement. The flow meter measures the flow rate of liquid in a closed pipe by using a pair of clamp-on sensors. WESS use its own patented technologies such as advanced signal processing and low-voltage operation to achieve high accuracy and reliable performance. Besides, the product provides versatile output interfaces, analog and digital, which can be easily used by a PLC or a flow controller.

    Ultrasonic Flow Meter Flo100 Features

    • Positive / Negative / Net flow totalizer
    •  Proprietary Low-Voltage Transmission and Self-Adaptation Technologies
    • No pipe Cutting or Process Interruption by Using Clamp-On Technology
    •  Able to Measure Electrically Conductive and Non-Conductive Liquids
  • Magmeter Flow Sensor 2551

    Call for price

    Insertion Magmeter Flow Sensor 2551

    The Georg Fischer 2551 Magmeter is an insertion magnetic flow sensor that features no moving parts, available in corrosion-resistant materials to provide long-term reliability with minimal maintenance costs. Material options include PP with stainless steel, PVDF with stainless steel, PVDF with Hastelloy-C, or PVDF with Titanium. Utilizing the comprehensive line of Georg Fischer installation fittings, sensor alignment and insertion depth is automatic. These versatile, simple-to-install sensors deliver accurate flow measurement over a wide dynamic range in pipe sizes ranging from DN15 to DN900 (½ to 36 inches), satisfying the requirements of many applications.

    Georg Fischer 2551 Magmeters offer many output options of frequency/digital (S3L) or 4 to 20 mA which are available on both the blind and display versions. The frequency or digital (S3L) sensor output can be used with Georg Fischer's extensive line of flow instruments while the 4 to 20 mA output can be used for a direct input to PLCs, chart recorders, etc. Both the 4 to 20 mA output and digital (S3L) sensor interface is available for long distance signal transmission. An additional benefit is the empty pipe detection which features a zero flow output when the sensors are not completely wetted. Also, the frequency output is bi-directional while the 4 to 20 mA output can be set for uni- or bi-directional flow using the display or the 3-0250 USB to Digital (S3L) Configuration / Diagnostic set-up tool which connects to PCs for programming capabilities.

    In addition the display version of the 2551 Magmeter is available with relays and features permanent and re-settable total values which can be seen on the display. Also, the display contains multi-languages with English, Spanish, German, French, Italian and Portuguese menu options.

    Magmeter flow sensor features:

    • Installs into pipe sizes: DN15 to DN900, 0.5 to 36 in
    • Operating range: 0.05 to 10 m/s, 0.15 to 33 ft/s
    • Max Pressure rating: PP 10.3 bar @ 25 °C, 150 psi @ 77 °F
    • Power source: 4 to 20mA: 21.6 to 26.4 VDC, 22.1mA max
    • *Only Georg Fischer installation fittings
  • Paddle Wheel Flow Meter with Integral Transmitter 9900

    Call for price

    Signet has combined the 9900 SmartPro® Transmitter with the 515/8510 and 2536/8512 Paddlewheel Flow sensors to create integral systems that are easy to order and simple to install. Integral systems are also available in conductivity, level, temperature, and pressure configurations.

    Each integral system features a 9900 Transmitter which provides a local and easy to read LCD display. The push button keypad makes it easy to navigate through the transmitter’s menu. The DC-powered 9900 features a scalable 4 to 20 mA output and open collector for process control.

    Flow Integral Systems with 9900 Transmitters are combined with Signet’s field-proven Models 515/8510 and 2536/8512. These sensors reliably perform in flow ranges from 0.3 to 6 m/s (1 to 20 ft/s) and 0.1 to 6 m/s (0.3 to 20 ft/s) respectively for pipe sizes from ½ to 8 inches. They are available in a variety of materials including polypropylene and PVDF and are easily mounted in the pipe using Signet’s comprehensive line of standard fittings.

    Paddle wheel Flow meter Features

    • Warning LED indicator
    • Selectable error mode for current outputs, 3.6 mA or 22 mA
    • Large auto-sensing backlit display with “at a glance” visibility
    • Local display for sensor mounted instruments
    • Provides 4 to 20 mA output
    • "Dial-type" digital bar graph
    • NEMA 4X/IP65
  • Standard Mount Paddlewheel Flow sensor -515

    Call for price

    Overview of Paddle Wheel flow sensor 515

    The Model 515 sensors are offered in a variety of materials for a wide range of pipe sizes and insertion configurations. The many material choices include PP and PVDF make this model highly versatile and chemically compatible to many liquid process solutions. Sensors can be installed in up to DN900 (36 in.) pipes using Signet's comprehensive line of custom fittings which include tees, saddles, and weldolets, set the sensor to the proper insertion depth into the process flow. The sensors are also offered in configurations for wet-tap and intrinsically safe installation requirements.

    Simple to install with time honored reliable performance, Model 515 Rotor-X paddle wheel flow sensors are highly repeatable, rugged sensors that offer exceptional value with little or no maintenance. The output signal of the Model 515 is a sinusoidal frequency capable of driving a self-powered flowmeter (Model 5090). The wide dynamic flow range of 0.3 to 6 m/s (1 to 20 ft/s) allows the sensor to measure liquid flow rates in full pipes and can be used in low pressure systems.

    Paddle wheel flow sensor features

    • Operating range: 0.3 to 6 m/s, 1 to 20 ft/s
    • Simple, economical design
    • Installs into pipe sizes: DN15 to DN900, 0.5 to 36 in
    • Max Pressure rating: PP 12.5 bar @ 20 °C, 180 psi @ 68 °F PVDF 14 bar @ 20 °C, 200 psi @ 68 °F
    • Power source: Self powered
    • Highly repeatable output
    • Chemically resistant materials
    • Compatibility: 8150, 8900, 9900, 9900-1BC, 9950
    • *Only Signet installation fittings