Ultrasonic and Insertion Magnetic Flow Meters :: Products :: Transit Time Flow Meters

By: Dynasonics  09-12-2011
Keywords: flow meters, Flow Meter, Complete Product


Dynasonics offers a full line of transit time ultrasonic flow meters to satisfy a variety of customer applications. The TFX family of products features non-invasive meters designed to provide superb accuracy and response characteristics for measuring clean liquids.

To view complete product details, select from the following list of products:

– Clamp-on Flow and Energy Meter, Integral and Remote Models
– Compact Flow Meter, Integral and Remote Models
– Portable Flow Meter

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 = K * D * dt, where K is a constant and D is the distance between the transducers.

The TFX family of transit time flow meters is equipped with either two transducers that are clamped on the outside of a closed pipe at a specific distance from each other or a single clamp-around design.  For applications that use two transducers, the transducers can be mounted in V-Mount where the sound transverses the pipe two times, W-Mount where the sound transverses the pipe four times, or in Z-Mount where the transducers are mounted on opposite sides of the pipe and the sound crosses the pipe once.


Keywords: Complete Product, Flow Meter, flow meters, Operating Principle, Portable Flow Meter, Transit Time Ultrasonic, Ultrasonic Flow Meters,

Other products and services from Dynasonics

09-12-2011

Ultrasonic and Insertion Magnetic Flow Meters :: Products :: TFX Ultra Transit Time Flow Meters

The technology has inherent advantages over alternate devices including: low-cost installation, no pressure head loss, no moving parts to maintain or replace, no fluid compatibility issue, and a large, bi-directional measuring range that ensures reliable readings even at very low and high flow rates.


09-12-2011

Ultrasonic and Insertion Magnetic Flow Meters :: Products :: ULTRALINK

ULTRALINK™ communicates with TFX and MFX flow meters through a PC serial communications port and infrared serial adapter (TFX Ultra™ uses any standard A/B USB cable and TFXL products require a hardwire interconnection). Designed with the user/operator in mind, configuration and calibration of transit time ultrasonic flow meters has never been as simple and straightforward as it is with Series TFX and Series MFX.


09-12-2011

Ultrasonic and Insertion Magnetic Flow Meters :: Products :: Hybrid Ultrasonic Flow Meters

By automatically determining which principle to use, these meters are able to provide the most accurate measurement for the present conditions of the application. Since sound energy in a moving liquid is carried faster when it travels in the direction of fluid flow, a differential in the times of flight will occur. The flow meter operates by transmitting and receiving a frequency modulated burst of sound energy between two transducers.


09-12-2011

Ultrasonic and Insertion Magnetic Flow Meters :: Products :: Doppler Flow Meters

Availble in three separate product styles to accomodate a variety of customer applications, the DFX family of products includes non-invasive meters as well as an insertion probe for applications where the pipes do not readily pass untrasound, such as concrete, FRP/GRP or wooden materials. Dynasonics Doppler ultrasonic flow meters are designed to measure the flow of liquids that contain sound reflectors – suspended solids or gas bubbles.


09-12-2011

Ultrasonic and Insertion Magnetic Flow Meters :: Products

Dynasonics offers four different flow measurement technologies to satisfy a variety of customer application requirements. The selection of the proper technology is pertinent to the satisfactory operation of the flow measurement instrument.