|
The Dynasonic Series DTFXL ultrasonic flow meter clamps
onto the outside of a pipe and does not contact the internal
liquid. This non-invasive system allows solids to pass through
the pipe with no effect on the flow meter. Y-strainers or
filtering devices are not needed. In addition, installation of
these ultrasonic flow meters is easy and low cost.
This ultrasonic flow meter from the Dynasonics DTFXL Series
provides instantaneous rate and accumulated flows along with
4-20mA and pulse outputs. The DTFXL flow meter is housed in an
enclosure suitable for outdoor mounting and is available with
or without a local display. Compact integral mount systems can
accommodate pipes 2 inches [50 mm] and smaller. For additional
flexibility, remote mount systems are available for pipe sizes
1/2 inch [12 mm] and higher. A software utility is available
for customer configuration and in-field calibration.
Greater accuracy can be attained in applications with high
levels of entrained gases. Ultrasonic flow meters from the
Dynasonics DTFXL Series will automatically correct displayed
flow rates and electronic outputs.
The DTFXL’s inherent advantages over competitive
technologies include ease of installation, immunity to
suspended solids and gas pockets, and a large bi-directional
measuring range. In addition, this ultrasonic flow meter’s
non-contact design eliminates any fluid compatibility issues.
The DTFXL flow meter was designed to replace mechanical flow
meters in applications where liquid conditions tend to damage
or impede mechanical flowmeter operation. No maintenance is
required.
Operating Principle
Transit time flow meters utilize two transducers which
function as both ultrasonic transmitters and receivers. The
flow meters operate by alternately transmitting and receiving
a frequency modulated burst of sound energy between the two
transducers. The burst is first transmitted in the direction
of fluid flow and then against fluid flow. Since sound energy
in a moving liquid is carried faster when it travels in the
direction of fluid flow (downstream) than it does when it
travels against fluid flow (upstream), a differential in the
times of flight will occur. The sound’s time of flight is
accurately measured in both directions and the difference in
time of flight calculated. The liquid velocity (V) inside the
pipe can be related to the difference in time of flight (dt)
through the following equation: V = KDdt, where K is a
constant and D is the distance between the transducers.
| 
PATHFINDER
INSTRUMENTS
Order or Shop On Line
