Description
AT221 is a full function handle transfer time ultrasonic flow meter. No matter you want to quickly verify the flow reading of another meter or to data log flow system values over an extended time period, the AT221 is the suitable tool. The AT221 portable meter has the clamp on transducers no tapping or cutting is required, just clamp outside of the pipe.
The meter can installed be easily moved and in different pipe and convenient to carry site to site.Its portability makes it an excellent choice for measuring flows throughout the plumbing infrastructure to verify sensor, pump and valve performance.
Working Principle
When the ultrasonic signal is transmitted through the flowing liquid, there will be a difference between the upstream and downstream transit time ( travel time or time of flight ), which is proportional to flow velocity, according to the formula below.
Remark:
V: Medium Velocity
M: Ultrasonic frequency of reflection
D: Pipe Diameter
θ: The angle between the ultrasonic signal and the flow
Tup: Transit time in the forward direction
Tdown: Transit time in the reverse direction
ΔT = Tup – Tdown