Handheld ultrasonic flow meters feature advanced Transit-Time measuring technology, providing accurate and reliable flow rate and total flow display, This unit utilizes a non-invasive transducer which is hand-held or strapped to the outside of a pipe, which will provide benefits of non-fouling operation and ease of installation.
The Handheld transit time flow meters utilize two transducers that function as both ultrasonic transmitters and receivers.
The transducers are clamped on the outside of a closed pipe at a specific distance from each other. The transducers can be mounted in V-mode where the sound transverses the pipe two times, W-mode where the sound transverses the pipe four times, or in Z mode where the transducers are mounted on opposite sides of the pipe and the sound crosses the pipe once. This selection is based on pipe and liquid characteristics. The flow meter operates by alternately transmitting and receiving a frequency modulated burst of sound energy between the two transducers and measuring the time interval that it takes for sound to travel between the two transducers. The difference in the time interval measured is directly related to the velocity of the liquid in the pipe.
The Handheld flow meter can be successfully applied on a wide range of metering applications. The simple to program transmitter allows the standard product to be used on pipe sizes ranging from 20mm -6000mm internal diameters. A variety of liquid applications can be accommodated: ultra-pure liquids, potable water, chemicals, raw sewage, reclaimed water, cooling water, river water, plant effluent, etc. Because the transducers are non-contacting and have no moving parts, the flow meter is not affected by system pressure, fouling or wear. Standard transducers are rated to 85°C.
The transit time flow meter features the ease of operation, high accuracy and outstanding reliability, while the software provides a very user-friendly interface and much more functions. It employs a patent balanced lower voltage multi-pulse igniting circuit which increases the anti-interference ability magnificently so that the flow meter will work properly even in demanding industrial environments such as those with power frequency transmitter working nearby. The signal receiving circuits feature self-adapting performance so as to ensure that the user can easily operate the instrument without any adjustment. The built-in rechargeable Ni-H battery can work continuously for more than 12 hours without recharge.
