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Pine stocks a wide range of open channel water flow meters for highly accurate water velocity and discharge measurements in open channels and partially filled pipes. Offering some of the world's leading brands such as Marsh McBirney and Global Flow, these instruments provide reliable precise measurements in streams, sewers, mining and irrigation canals and other open channel systems.

To find out more, please click on a product from the list.  At Pine, we specialize in delivering total equipment solutions and providing technical advice on what to rent and how to use it; our rental fleet is second to none and our equipment is always tested and delivered ready to use.


EESiFlo EASZ-10P Handheld FlowMeter
EESiFlo EASZ-10P Handheld FlowMeter

The EESIFLO EASZ-10P is a handheld non -invasive microprocessor based meter for measuring the flow rate and total volume of liquids flowing through process and effluent pipelines. It is suitable for a wide range of liquids, including aerated water, liquids containing suspended solids, slurries and sludges. The EESIFLO EASZ-10P requires fluids with a minimum concentration of 100 ppm of solids or bubbles having minimum size of 100 microns and works on most pipes 2 inches and above.
The flowmeter utilises the non-intrusive Doppler principle to measure the mean velocity and is particularly useful as a temporary flow indicator or as a working tool to establish flow conditions in field or plant installations. Units of measurement available are m/s, ls, lm, lh, m3/sec, m3/m, m3/hr, ft3/h, ft3/s, usgps, usgpm, usgph, usmgd.

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GLOBAL FLOW PROBE 3' - 6'
GLOBAL FLOW PROBE 3' - 6'
The Global Flow Probe is a highly accurate water velocity instrument for measuring flow in open channels and partially filled pipes. It is ideal for stormwater runoff studies and measuring flow in rivers, streams, ditches and sewers. The probe housing can be placed directly on the bottom of a pipe or stream bed to measure low flows down to one-and-a-half inches in depth. The Flow Probe uses true velocity averaging. When the probe is put into flowing water, a running average is started. As long as the probe remains in the flow, averaging continues until it is steady reading. When the probe is pulled from the water, the average value is frozen on the display until reset.
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Greyline Instruments PDFM 4.0  Portable Doppler Flow Meter
Greyline Instruments PDFM 4.0 Portable Doppler Flow Meter

It's ideal for flow troubleshooting, balancing and checking performance of permanent flow meters. The new PDFM 4.0 is fast and easy to operate – you can mount the sensor on the outside a pipe in less than a minute. Use the built-in keypad and calibration menu to set up the flowmeter for your application. The PDFM 4.0 works on any liquid containing bubbles or solids and is recommended for "difficult liquids" like wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. Measures flow through most metal and plastic pipes including PVC, ductile iron, carbon steel and stainless steel.

The Greyline PDFM 4.0 is AC/DC powered with a built-in battery and charger. With its 4-20mA output you can even use the PDFM 4.0 as a spare transmitter in critical applications. For flow studies and troubleshooting use the built-in 50,000 point Data Logger. Retrieve data logs with 'Greyline Logger' software – included free with each PDFM 4.0. Connect the RS232 output directly to the serial port on your PC or Laptop, or by dial-up connection through modems and phone lines.

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Greyline Instruments PDFM 5.1 Portable Doppler Flow Meter
Greyline Instruments PDFM 5.1 Portable Doppler Flow Meter

It's ideal for flow troubleshooting, balancing and checking performance of permanent flow meters. The new PDFM 5.1 is fast and easy to operate – you can mount the sensor on the outside of a pipe in less than a minute. Use the built-in keypad and calibration menu to set up the flowmeter for your application. The PDFM 5.1 works on any liquid containing bubbles or solids and is recommended for "difficult liquids" like wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. Measures flow through most metal and plastic pipes including PVC, ductile iron, carbon steel and stainless steel.

The Greyline PDFM 5.1 is AC/DC powered with built-in NiMH batteries and external charger. With its 4-20mA output you can use the PDFM 5.1 as a spare transmitter in critical applications. For flow studies and troubleshooting use the built-in 300,000 point Data Logger. Retrieve data logs with 'Greyline Logger' software – included free with each PDFM 5.1. Connect the USB output directly to your PC or Laptop to download data logger files.

The PDFM 5.1 includes a non-intrusive Doppler ultrasonic sensor for pipes from 1/2" to 180" (12.5 mm to 4.5 m) diameter, a stainless steel sensor mounting bracket and clamps, coupling compound and AC charger with a rugged IP67 carry case. It operates up to 18 hours from internal batteries and recharges overnight.

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Greyline Instruments Portable Area-Velocity Flow Meter - Manta Ray
Greyline Instruments Portable Area-Velocity Flow Meter - Manta Ray

The MantaRay Portable Area-Velocity Flow Meter measures flow in open channels, partially filled and surcharged pipes using an ultrasonic sensor. It's designed for monitoring stormwater, sewage, industrial effluent, irrigation water and natural streams. The MantaRay displays and datalogs flow rate and total flow and connects to samplers, SCADA and telemetry systems.

Calibration is simple: enter the pipe diameter or channel dimensions and the MantaRay automatically computes and displays the flow rate and total on its backlit LCD display. Mount the sensor at the bottom of the pipe or channel and hang the IP67 electronics case above the high water level.

Hydrodynamic Ultrasonic Sensor

The MantaRay uses a submerged ultrasonic sensor to continuously measure flow or reverse flow in open channels, partially filled or surcharged pipes. The sensor is a completely sealed ultrasonic unit with no orifices or ports. It is hydrodynamically shaped and designed to shed deposits and stringers for reliable operation in sewage, stormwater and stream flow applications.

The QZ02L sensor mounts inside the pipe or at the bottom of an open channel. No special compounds, tools or hardware are required. A stainless steel mounting bracket is included and a size range of optional pipe bands are available for sensor installation in manholes.

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Hach FLO-DAR® AV Sensor
Hach FLO-DAR® AV Sensor

It’s pretty easy to understand why “staying out of the flow” is a smart approach to avoid sensor-fouling and the resulting missed flow data. That’s exactly why we developed the non-contact FLO-DAR® AV Sensor. Using advanced digital Doppler radar velocity-sensing technology, along with ultrasonic level-sensing, the FLO-DAR revolutionizes open-channel flow monitoring by measuring from above the flow. This means it can more effectively provide highly-accurate flow data under a wide range of challenging flow and site conditions, including sensor disturbances, high solids content, high temperature, shallow and caustic flows, large man-made channels, and high velocities of up to 20 ft/s, to name a few.

And because the FLO-DAR is mounted above it all, personnel have little or no contact with the flow during installation. In fact, future sensor removal or replacement can even be done without the need for confined space entry. Talk about a time saver.

Lastly, for those times when a surcharge event does raise the flow to sensor level, the FLO-DAR's pressure level sensor and optional electromagnetic Surcharge Velocity Sensor will continue to provide uninterrupted and accurate flow data. All of this mean less need for routine sensor cleaning or maintenance, and more consistent flow data for your analysis. And that’s a good thing.

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Hach Flo-Tote Portable Open Channel Flowmeter
Hach Flo-Tote Portable Open Channel Flowmeter

The Flo-Tote flowmeter has been the industry standard for over two decades and has now been updated to include customer requested features including a disconnectable/interchangeable electromagnetic sensor that is also field replaceable.
The original Flo-Tote Open Channel Flowmeter has been the industry standard for over two decades. Tens of thousands of users worldwide have verified Flo-Tote's accuracy. Now, the revolutionary NEW Flo-Tote 3 is available with customer requested features while utilizing the same proven electromagnetic sensor technology.

Here's How It Works
The Flo-Tote 3 measures both velocity and level in the same cross-section, a requirement necessary for accurate flow rate measurement using the Continuity Equation Q = V x A where Q = Flow, V = Average Velocity and A = Area. The flow accuracy of the Flo-Tote is based upon the accurate measures of both velocity and level in hydraulic flow labs, as well as under actual sewer conditions. Verification of our specifications by an independent flow laboratory assures you of our commitment to accuracy.

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Marsh McBirney Flo-Mate 2000 Flow Meter
Marsh McBirney Flo-Mate 2000 Flow Meter

The Flo-Mate 2000 has long been the standard portable water flow monitoring. The Flo-Mate is a lightweight, portable electromagnetic flowmeter that provides instantaneous readout of flow stream velocity, river velocity, sewer flow, and irrigation channels, is ideal for weir/flume calibration, and works well with aquafuel pumping tests. Unit has data storage/recall and water resistant electronics. Direct replacement for USGS type mechanical meters. Ideal for NSIP (National Streamflow Monitoring Program).

With instantaneous readout of flow velocity, the Flo-Mate flowmeter is ideal for calibrating flumes, weirs and other primary devices, or for measuring flow velocity in streams, sewers, mining and irrigation canals and other open channel systems.

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Peak DCT 7088 Digital Correlation Transit Time Flowmeter
Peak DCT 7088 Digital Correlation Transit Time Flowmeter

The Polysonics DCT7088 portable, digital-correlation, transit-time flowmeter is the most durable meter of its kind! Housed in a virtually indestructible, waterproof carrying case, this user-friendly device features a 40,000-point data logger and a memory function that stores four sets of site parameters to simplify installation and ongoing operation.

The DCT7088 combines digital signal processing (DSP) with correlation detection methods to measure velocity, flow rate and volumetric flow. Principally engineered for clean liquid applications, the instrument is tolerant of liquids with higher concentrations of entrained solids or gas bubbles than was previously possible with transit-time technology. Unlike competitive transit-time flowmeters, multiple transducers are not required for different pipe materials and sizes. The standard transducer set is suitable for most plastic, metal and even concrete-lined pipes that range in size from 1 inch (25 mm) to 200 inches (5 m). The non-intrusive, clamp-on transducers install without flow interruption and ensure leak-free measurements with zero pressure drop.

Housed in a rugged NEMA 6 enclosure, the DCT7088 is waterproof against accidental immersion, is splashproof with the lid open, and is built to operate in severe weather conditions. Simple menu-driven operation enables the DCT7088 to be configured in a fraction of the time necessary for competitive transit-time flowmeters, and it is programmable to start and finish flow measurements at predetermined times for unattended operation. The meter provides up to 16 hours of continuous battery operation and fully recharges in only 8 hours.

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Seametrics jWAVE Portable Transit Time Ultrasonic Flow Meter
Seametrics jWAVE Portable Transit Time Ultrasonic Flow Meter

Meet the Seametrics jWAVE. Capture accurate and reliable flow readings with your mobile device, with less hassle and in less time—wherever you need a flow or volume measurement.

No wires. No bulky electronics box to lug around. Your ultrasonic flow meter hardware installs on the outside of your pipe in a snap—and senses through the pipe wall. Your mobile device displays readings and helps you set up the hardware.

The jWAVE Flow Meter solution starts with the jWAVE App (downloadable from the app stores) and works on both iOS and Android devices with Bluetooth 4.0 (BT LE).

The jWAVE Flow meter is a compact, strap-on transit time ultrasonic transducer device. The jWAVE operates by alternately transmitting and receiving a frequency modulated burst of sound energy between two transducers. It then wirelessly transmits flow measurements to your mobile device.

Use the built-in data logger to conveniently record flow for as long as 14 days or as little as one minute.

The jWAVE is highly portable. Just bring the rechargeable clamp-on meter in its lightweight, weatherproof case, along with a tablet or smartphone (iOS or Android). Bluetooth connectivity replaces wires, and the jWAVE App guides you through setup.

The convenient Cam Cleat lets you mount the meter on any pipe in seconds—no cumbersome clamps required.

Bi-directional readings are transmitted to your mobile device for display, and your location’s settings are stored in the jWAVE App, ready for reuse.

When you are done, simply release the cleats, then take the compact flow meter on to your next location.

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SonTek FlowTracker Handheld-ADV
SonTek FlowTracker Handheld-ADV

The FlowTracker Handheld-ADV® (Acoustic Doppler Velocimeter) measures 2D or 3D currents, attaches easily to wading rods, and features an automatic discharge computation using a variety of international methods, including ISO and USGS standards. The FlowTracker also features SonTek's exclusive "SmartQC" which involves a series of built-in data quality checks, so you know your data is right. At the end of the data run, just press a button and the FlowTracker calculates the discharge for you!

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