Non-Contacting Ultrasonic Sensor
Accurate and Verifiable
Built-in 50,000 point Data Logger
Windows Software
USB and RS232 Outputs
4-20mA/0-5V Output
16-digit Totalizer
3 Programmable Control Relays
Password Protected
Simple 3-key Calibration

Continuously monitor, display, totalize and data log flow through any flume or weir. The OCF 4.0 includes a non-contacting ultrasonic sensor that mounts just 8" (203.2 mm) above the flowing water. It is accurate (±0.25%) and reliable. There is no obstruction to flow and no fouling. Use the built-in Keypad/menu system to select your flume or weir from the Menu and to choose measurement units (gallons, liters etc.)

The Greyline OCF 4.0 includes built-in 50,000 point Data Logger and flow reporting system. Retrieve data logs with 'Greyline Logger' software – included free with each OCF-4.0. Connect the USB or RS232 output directly to the serial port on your PC or Laptop, or by dial-up connection through modems. Configure the analog output to 0-5V for reduced power consumption.

Use the isolated 4-20mA to transmit flow to remote chart recorders or displays, and the 3 control relays are programmable for level/flow alarm, and flow proportionate pulse (for samplers, chlorinators or remote totalizers). An Intrinsic Safety Barrier is optional for sensor and cable installation in hazardous rated locations. The separate, watertight electronics/display enclosure is mounted at a convenient location within 500 ft (150 m) of the sensor.

OCF 4.0 Engineering Specifications	How It Works
OCF 4.0 User's Guide (1.5MB Adobe Acrobat file)	OCF 4.0 Brochure (800KB Adobe Acrobat file)
OCF 4.0 Order Form (50KB Adobe Acrobat file)	More Information

AVFM-II Area-Velocity Flow Monitor

Monitor flow through open channels, partially full sewer pipes and surcharged pipes without a flume or weir. Ideal for stormwater, combined effluent, raw sewage, irrigation water and streams.

The AVFM-II uses a submerged ultrasonic sensor to continuously measure both Velocity and Level in the channel. The sensor is a completely sealed ultrasonic unit with no orifices or ports. It mounts inside a pipe or at the bottom of a rectangular, trapezoid or egg-shaped channel. Calibration is simple: enter the pipe diameter or channel width and the AVFM-II computes the flow volume and displays the flow rate.

AVFM-II Engineering Specifications	AVFM-II Brochure (709KB Adobe Acrobat file)
AVFM-II Order Form (37KB Adobe Acrobat file)	AVFM-II User's Guide (965KB Adobe Acrobat file)
Optional Pipe Mounting Bands (300KB Adobe Acrobat file)	Optional Built-in Data Logger & Software   (908KB Adobe Acrobat file)
How It Works	More Information

Stingray Portable Level-Velocity Logger
for Area-Velocity Flow Surveys in Sewers, Steams and Open Channels

Stingray is a compact, battery-powered logger with an ultrasonic sensor. It data logs level, velocity and water temperature readings for flow monitoring through open channels, partially full sewer pipes and surcharged pipes. Use it for flow surveys, I&I studies, stormwater, irrigation water and sewage.

Stingray uses a submerged ultrasonic sensor to continuously measure both Velocity and Level in the channel. The sensor is a completely sealed ultrasonic unit with no orifices or ports. It mounts inside the pipe or at the bottom of a rectangular channel. No special compounds, tools or hardware are required.

Stingray Engineering Specifications	Stingray Brochure
Stingray Order Form	Stingray User's Guide
Stingray Quick Start Guide	Optional Pipe Mounting Bands
Greyline Logger Software	White Paper - Water Accountability (Glen Walter Flow Survey)
How It Works	More Information

PDFM 5.0 Portable Doppler Flow Meter

It's ideal for flow troubleshooting, balancing and checking performance of permanent flow meters. The new PDFM 5.0 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 5.0 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 5.0 is AC/DC powered with built-in NiMH batteries and external charger. With its 4-20mA output you can use the PDFM 5.0 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 5.0. Connect the USB output directly to your PC or Laptop to download data logger files.

The PDFM 5.0 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.

Portaflow PT500 Portable Transit Time Flow Meter

Recommended for clean fluids like water, glycol, oil and most chemicals. The Portaflow PT500 ultrasonic sensors clamp on the outside of vertical or horizontal pipes from 0.51" to 78" (13 to 2000 mm) outside diameter. The ultrasonic signal travels through all common metal and plastic pipe materials. Sensors can be mounted without shutting down flow and there is no obstruction or pressure drop. Flow rate and totalizer are displayed continuously along with battery status, signal strength. Press one key to instantly change the units of flow measurement (e.g. from gallons to liters). Real time flow can be displayed in large numeric values or as a graph.

Portaflow calibration is easy with the onscreen menu system. Enter the pipe diameter, wall thickness and pipe material, and the PT500 calculates the optimum mounting method and separation distance for the sensors. The PT500 includes two Sensor pairs: one set for small pipes and another for large pipe sizes.

Calibration parameters can be stored for up to twenty different sites so that operators can recall calibration setups from the Portaflow memory. Store readings with the built-in 98,000 point data logger. Logs can be displayed onscreen in text or graph formats and downloaded through USB and RS232 outputs.

The PT500 includes two sensor pairs, stainless steel guiderail and mounting clamps, sensor cables, coupling compound and AC charger with a rugged IP67 carry case. It operates up to 16 hours from internal batteries and recharges overnight.

Portaflow PT400 Portable Transit Time Flow Meter

Recommended for clean fluids like water, glycol, oil and most chemicals. Sensors can be mounted without shutting down flow and there is no obstruction or pressure drop. The ultrasonic signal travels through all common metal and plastic pipe materials. Flow rate and totalizer are displayed continuously along with battery status, signal strength. Press one key to instantly change the units of flow measurement (e.g. from gallons to liters). Real time flow can be displayed in large numeric values or as a graph.

Portaflow calibration is easy with the onscreen menu system. Enter the pipe diameter, wall thickness and pipe material, and the PT400 calculates the optimum mounting method and separation distance for the sensors.

The Portaflow PT400 ultrasonic sensors clamp on the outside of vertical or horizontal pipes. Select a Sensor pair for the range of pipe sizes you will monitor:

'A' Transducers for 0.51" to 4.5" Outside Diameter (13 to 115 mm)*

'B' Transducers for 2” to 39.37” Outside Diameter (50 to 1000 mm)*

Calibration parameters can be stored for up to twenty different sites so that operators can recall calibration setups from the Portaflow memory. Use the 5V pulse or 4-20mA output to transmit to external devices like data loggers or recorders.

The P400 includes 'A' or 'B' sensor pairs, stainless steel guiderail and mounting clamps, sensor cables, coupling compound and AC charger with a rugged polypropylene carry case. It operates up to 16 hours from internal batteries and recharges overnight.

Measure flow from outside a pipe. The Greyline DFM 5.0 is designed for "difficult liquids" that would damage regular flow meters - wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. There is no obstruction to flow and no pressure drop. The standard, strap-on ultrasonic sensor fits any pipe 1/2" (12.5 mm) Inside Diameter or larger. The electronics/display enclosure can be mounted nearby.

Use the isolated 4-20mA to transmit flow to remote displays, recorders or controllers. The 2 programmable relays (optional 4 total) can be used for flow control, pump protection or flow proportionate pulse. Calibration is easy with the built-in 5-key calibrator. Display and totalize flow in your choice of engineering units (gallons, liters etc.)

Sensor cable can be extended up to 500 ft. (152 m) with no loss of signal. The DFM 5.0 can be equipped with intrinsic safety barriers for sensor installation in hazardous rated locations. Other options include high temperature sensors and a built-in 2 million point Data Logger with USB output.

The DFM 5.0 includes a new digital signal processor to filter background noise and interference and to measure flow rates accurately in liquids containing gas bubbles or solids particles.

Note : The DFM 5.0 is not yet available with CE marking. Select the Greyline model DFM 4.0 if the CE mark is required.

DFM 4.0 Doppler Flow Meter

Measure flow from outside a pipe. The Greyline DFM 4.0 is ideal for "difficult liquids" that would damage regular flow meters - wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. There is no obstruction to flow and no pressure drop. The standard, strap-on ultrasonic sensor fits any pipe 1/2" (12.5 mm) Inside Diameter or larger. The electronics/display enclosure can be mounted nearby.

Use the isolated 4-20mA to transmit flow to remote displays, recorders or controllers. The 3 programmable relays can be used for flow control, pump protection or flow proportionate pulse. Calibration is easy with the built-in 3-key calibrator. Display and totalize flow in your choice of engineering units (gallons, liters etc.)

Sensor cable can be extended up to 500 ft. (152 m) with no loss of signal. The DFM 4.0 can be equipped with intrinsic safety barriers for sensor installation in hazardous rated locations. Other options include high temperature sensors and a built-in 50,000 point Data Logger.

The DFM 4.0 includes a new digital signal processor to filter background noise and interference and to measure flow rates accurately in liquids containing gas bubbles or solids particles.

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.

Portaflow Portable Transit Time Flow Meter

Recommended for clean fluids like water, glycol, oil and most chemicals. Portaflow ultrasonic sensors strap-on the outside of vertical or horizontal pipes from 2" to 40" (50 to 1000 mm) diameter. The ultrasonic signal travels through all common metal and plastic pipe materials. Sensors can be mounted without shutting down flow and there is no obstruction or pressure drop. Flow rate and totalizer are displayed continuously along with battery status, signal strength. Press one key to instantly change the units of flow measurement (e.g. from gallons to liters). Real time flow can be displayed in large numeric values or as a graph.

Calibration is easy with the onscreen menu system. Enter the pipe diameter, wall thickness and pipe material, and the Portaflow calculates the optimum mounting method and separation distance for the sensors. Calibration parameters can be stored for up to twenty different sites so that operators can recall calibration setups from the Portaflow memory.

DFS-II Doppler Flow Switch

Control Flow from outside a pipe. Recommended for "difficult liquids" including wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. The Greyline DFS-II is ideal for pump protection or to activate flow/no-flow alarms.

The DFS-II strap-on Sensor mounts on any pipe over 1/2" diameter without cutting the pipe or shutting down flow. It installs in minutes and requires no maintenance. Includes one 5 amp DPDT control relay with 0-60 second adjustable time delay. Bright LED indicators show relay status and signal strength. Electronics are housed in a watertight enclosure and Sensor cable is shielded and can be extended up to 500 ft. (152 m).