Optional 2 million point Data Logger
with USB output to Flash memory
5.1 Doppler Flow Meter
Measure flow from outside a pipe. The Greyline
DFM 5.1 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 non-intrusive,
clamp-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 programmable
relays 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 standard sensor is rated non-incendive
for Class I, Division 2 hazardous locations and the DFM 5.1
can be equipped with optional Intrinsic Safety Barriers for
sensor installation in Class I, Division I hazardous locations.
Other options include extra control relays and a built-in 2
million point Data Logger with USB output to Flash Drives.
The DFM 5.1 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
Power the unit off, plug in the relay board and power
back on. The instrument detects the new hardware and automatically
loads the menu system for calibration. In this video we
add four relays to a Greyline DFM 5.0 Doppler Flow Meter.
Following the same procedure you can also add a data
logger. It takes just a couple of minutes for complete
Consider the new handheld PDFM 5.1 Portable
Doppler Flow Meter . It also works from outside the
pipe with a clamp-on ultrasonic sensor, and includes a large
digital display, totalizer and 4-20mA output.