No obstruction. No pressure drop. Just minutes to install. Fast, Easy, Flow Measurement with Non-Contacting, Ultrasonic Sensor Versatile, Easy to Use Use a Greyline PDFM 5.1 Portable Doppler Flow Meter to monitor and balance flow, or to troubleshoot flow problems in full pipes. It is ideal to evaluate system performance and can be installed, calibrated, and startedup in minutes. Use it for projects where a permanent flow meter is not required, or to temporarily replace installed flow transmitters. Ideal for “Difficult” Fluids The PDFM 5.1 ultrasonic sensor is clamped on the outside of a pipe. An acoustic pulse is reflected to the sensor from particles or gases in the flowing liquid. The flow rate of any fluid can be measured as long as it contains air bubbles or solids. It is ideal for wastewater, slurries, sludge, viscous fluids, pulp stock, and abrasives. With its internal battery, the PDFM 5.1 can be operated all day and then recharged overnight. For continuous use it can be powered by a supplied 110-240 V AC wall plug adapter, or use Sleep Mode to only wake up the meter to take a measurement periodically, extending battery life. A 300,000 point data logger is built-in. THE RIGHT METER FOR • Raw Sewage • Aerated Water • Return & Waste Sludge • Slurries • Viscous Liquids • Pulp Stock • Abrasives Quick, Easy, Flow Measurements from Outside a Pipe Each Greyline PDFM 5.1 comes complete with a rugged watertight carrying case, clamp-on sensor, and stainless steel mounting kit. Use the simple 5-key menu system to select units of measurement and to configure for any pipe diameter 12.5 mm (0.5 in) or larger.

Simple Start-Up & Calibration Sensor mounting and a full calibration can be done in just a few minutes. It is fast and easy! Put coupling compound gel (included) on the sensor face and mount the sensor on the outside of a pipe with the stainless steel mounting bracket (supplied). Use the 5-key calibration system to enter pipe diameter and to select your choice of engineering units (liters, gallons, etc.) The PDFM 5.1 will immediately begin to display, transmit, and totalize. No Calculations — No Programming Codes Select your choice of display units: the PDFM 5.1 will display and totalize flow...

Technical Specifications GENERAL SPECIFICATIONS Operating Parameters: Liquids containing suspended solids or bubbles minimum size of 100 microns, minimum concentration 75 ppm Pipe Size: Ultrasonic sensor mounts on any pipe from 12.7 mm to 4.6 m ID (0.5 in to 15 ft) Power Input: • Built-in NiMH battery for up to 18 hours continuous operation • External charger with 100-240 V AC 50/60 Hz input Analog Output: • 4-20mA (500 Ω) when AC powered • USB for Data Log transfer by direct PC connection Data Logger: Programmable 300,000 data point capacity, time and date stamped or formatted flow reports including...

Ideal for Tough Flow Applications The PDFM 5.1 works best with “difficult” fluids in applications that would defeat or damage regular flow meters. Because the sensor is mounted on the outside of the pipe, there is no contact with the moving fluid. The ultrasonic sensor clamps onto the outside of pipes 12.5 mm (0.5 in) ID or larger and measures flow in common pipe materials: PVC, carbon steel, stainless steel, cast iron, fiberglass, lined or unlined ductile iron pipes, or any pipe that conducts ultrasound. Doppler signals cannot be transmitted through pipe walls that contain air pockets (materials...