Doppler ultrasonic flow meter
- Non-intrusive, clamp-on sensor for most pipes from DN 6 to DN 1500 (¼" to 59”).
- Wide velocity range: 0.05 to 9 m/s (0.15 to 30 ft/s).
- Flexibility: with automatic gain control and in-fieldlinearization, the DFX will adapt to a wide variety of applications.
- Inherent immunity to VFD and other electronic / ultrasonic noise.
- Hot-tap insertion probe sensor available for concrete, FRP/GRP, or wood stave pipes.
- Microprocessor-based system; configuration and accumulation data stored in non-volatile flash ROM.
Water, Lubricant oil
from 0.85 up to 3945213 l/min
from -40 up to 204 °C
Water & waste water industry, Chemical industry, Pharmaceutical industry, Food & beverage industry, General industry, Oil industry
Two sensor types are available with the DFX meter:
Series DT9 clamp-on, non-intrusive sensor is recommended for use on most pipes, constructed from metal or plastic. The DT9 is rated to Type 6 (IP67) and has the ability to work with temperatures up to +200 ºC (+400 ºF).
Series DP7 hot-tap insertion probe sensor is available for installations on pipe systems that do not permit ultrasound penetration. The DP7 inserts into the pipe wall and directly contacts the flowing liquid
|Liquid types||Fluids with a minimum of 100 ppm* useful suspended sound reflectors greater than 35 microns, and at least 25 % of the total particle volume is greater than 100 microns|
|Pipe sizes||DN 6 up to DN 1500|
|Accuracy||±2 % full scale|
|Power supply||115/100/230 VAC 50/60 Hz ±15 % @ 17 VA max.; 12 – 28 VDC @ 7 VA max.|
|Ambient conditions||-40 °C up to +85 °C|
|Velocity range||0,05 up to 9 m/s|
|Display||Two line LCD, LED backlit|
|*ppm = Particel per million|
Ultrasonic flow meters
Ultrasonic signals are alternately sent in and against the flow direction. Ultrasonic energy bursts are transmitted and received via well-defined paths across the flow stream. The velocity of the flow is accurately measured by the difference in the arrival times of signals from the upstream and downstream transducers. The transit time difference (Δt = t 2 – t 1) determines the average flow velocity.